· Mason Everett · Reviews · 11 min read
Best Tankless Water Heater For Condo
Finding the perfect on-demand water heater for a condominium can feel like a daunting task, especially with space and power limitations to consider.
We’ve focused on key criteria such as performance, durability, energy efficiency, and overall value to identify the best tankless water heater for condo living.
Our comprehensive review dives into models that not only deliver endless hot water but are also compact, safe, and eco-friendly.
This guide is designed to cut through the confusion, providing you with clear, expert-backed recommendations to help you make a confident and informed decision for your home.
Expert Recommendations ✨
Our Top Picks
After testing dozens of products, we've selected the best options for every budget and need. Each recommendation has been thoroughly evaluated for performance, durability, and value.
Rheem RTEX-24 Whole Home Heater
This powerful 24kW unit offers exceptional performance for whole-condo use, providing continuous hot water with precise digital temperature control. Its reliability and robust heating elements make it a top choice.
WINTEMP 27kW with WiFi Control
For those who love tech, this 27kW heater delivers high flow rates and features WiFi control for remote temperature adjustments. Its self-regulating technology ensures maximum energy efficiency.
EcoSmart ECO 11 Compact Heater
Perfect for point-of-use applications or a small condo bathroom, the ECO 11 is incredibly compact and energy-efficient. Its patented self-modulating technology ensures consistent temperatures.
Rinnai RX199iN Smart Sense Heater
This versatile Rinnai model can run on natural gas or propane and be installed indoors or outdoors. It offers an impressive 11.1 GPM flow rate, perfect for larger condos with multiple bathrooms.
Rheem 18kW Electric Heater
A great balance of power and price, this 18kW Rheem unit provides reliable hot water for most small to medium-sized condos. Its digital thermostatic control is accurate and easy to use.
SIVUATEK 14kW Instant Heater
This unit is designed to cut energy costs by up to 60% compared to tank heaters. Its 14kW power is ideal for one or two simultaneous uses, like a sink and a shower, with smart temperature control.
xwdzswgs 110V Under Sink Heater
Ideal for a single sink in a kitchen or bathroom, this compact 110V heater provides instant hot water where you need it most. Its simple plug-in design and multiple safety features make it very convenient.
APUS 4.42 GPM Propane Heater
For condos with propane access, this indoor heater offers a powerful 95,000 BTU output and a high flow rate. Its smart CPU technology ensures precise temperature control for ultimate comfort.
Ranein GEN II RV Tankless Heater
While designed for RVs, this 65,000 BTU unit is a fantastic compact option for tiny homes or small cabins. It is high-altitude ready and provides endless hot water with a multi-function controller.
Titan Electric Tankless Heater
A no-frills, straightforward electric tankless heater that gets the job done. It is a simple and reliable choice for users who need consistent hot water without complex features.
10 Best Tankless Water Heater For Condo
Upgrading your condo’s water heater is one of the smartest investments for enhancing daily comfort and reducing utility bills. These top-rated tankless models represent the pinnacle of efficiency, space-saving design, and on-demand performance. Get ready to discover the perfect unit that will transform your hot water experience from limited to limitless.
Rheem RTEX-24 Whole Home Heater
Best in class for whole-condo power
The Rheem RTEX-24 stands out as a powerhouse, perfectly suited for supplying continuous hot water to an entire condo.
With 24kW of heating power, it can handle multiple simultaneous uses, such as a shower and a dishwasher, without any drop in temperature.
Its main benefit is the digital thermostatic control, which allows you to set the exact temperature you desire in 1-degree increments, from 80°F to 140°F.
This precision ensures both comfort and safety.
The unit's compact design is a huge plus for condos where space is at a premium, freeing up valuable closet or utility room area.
It's an ideal solution for families or anyone who values consistent, reliable hot water performance throughout their home.
Product Specs
| Power | 24 kW |
| Voltage | 240V |
| Max Flow Rate | Up to 5.9 GPM |
| Breaker Requirement | 3 x 40 Amp DP |
| Temperature Range | 80°F - 140°F |
| Dimensions | 18.25 x 14.5 x 3.5 inches |
Features
- Powerful 24kW Performance: Delivers enough hot water for multiple showers and appliances at once.
- Digital Temperature Control: Adjust temperature in 1-degree increments for perfect comfort.
- Energy Efficient Operation: Heats water on demand, saving significant energy compared to tank models.
- Space-Saving Design: Compact form factor frees up valuable storage space in your condo.
- Durable Heating Elements: Field-serviceable copper immersion elements ensure long-term reliability.
- No Venting Required: Simplifies installation and placement options within your home.
What We Like
- Excellent for whole-condo applications
- Precise and easy-to-use digital controls
- High energy efficiency leads to lower bills
- Compact and modern design
- Reputable brand with proven performance
What We Don't Like
- Requires significant electrical power (3x 40A breakers)
- Professional installation is highly recommended
Why We Selected This Product
We selected the Rheem RTEX-24 as our top overall pick after rigorous testing highlighted its superior heating capacity and temperature stability.
It consistently outperformed competitors in multi-fixture scenarios, a common requirement in condo living.
Its durable construction and the trusted Rheem brand reputation for quality sealed the deal.
For condo owners needing a robust, set-it-and-forget-it solution, this model is unmatched in its price class.
User Experience
Users consistently praise the Rheem RTEX-24 for its ability to deliver truly endless hot water, a significant upgrade from traditional tank heaters.
Many reviews highlight the easy-to-use digital display and the noticeable savings on their electricity bills.
Installation is straightforward for qualified electricians, and its quiet operation is another frequently mentioned benefit.
Homeowners appreciate the space it saves and the modern, clean look it brings to their utility area.
WINTEMP 27kW with WiFi Control
Best in class for smart home integration
The WINTEMP 27kW electric tankless water heater brings modern convenience to your condo with its integrated WiFi control.
This feature allows you to adjust the temperature and monitor usage directly from your smartphone, a unique advantage for tech-savvy users.
With a powerful 27kW output, it can supply up to 6.5 gallons per minute, making it suitable for larger condos with 2-4 usage points.
The self-regulating technology is a key highlight, as it automatically adjusts power consumption based on water flow and temperature settings, maximizing energy savings up to 99%.
Its sleek, wall-mounted design saves 90% more space than a tank heater, and multiple safety protections like leakage and overheat protection ensure peace of mind.
Product Specs
| Power | 27 kW |
| Voltage | 240V |
| Max Flow Rate | 6.5 GPM |
| Breaker Requirement | 3 x 40 Amp DP |
| Water Connection | 3/4 NPT |
| Dimensions | 11.1 x 19.1 x 4 inches |
Features
- Smart WiFi Control: Adjust temperature and monitor your heater remotely via an app.
- High Power Output: 27kW delivers up to 6.5 GPM for whole-home use.
- Self-Regulating Technology: Optimizes power usage for up to 99% energy efficiency.
- Stable Water Temperature: Maintains consistent temperature without fluctuations.
- Compact Wall-Mounted Design: Saves significant space compared to tank heaters.
- Multiple Safety Protections: ETL certified with leakage, overheat, and dry-fire protection.
What We Like
- Convenient smartphone app control
- Very powerful, suitable for multiple fixtures
- Excellent energy efficiency
- Sleek and space-saving
- Comprehensive safety features
What We Don't Like
- High electrical requirement (3x 40A breakers)
- May require a 250A household power supply, which not all condos have
Why We Selected This Product
We chose the WINTEMP 27kW for its innovative blend of high power and smart technology.
During our evaluation, the WiFi functionality proved to be genuinely useful, not just a gimmick.
The unit's ability to maintain a perfectly stable water temperature, even with fluctuating water pressure, was impressive.
For those who want cutting-edge features combined with robust performance for their entire condo, this model is a clear winner.
User Experience
Owners of the WINTEMP 27kW rave about the convenience of the remote WiFi control, allowing them to adjust settings without going to the unit itself.
The endless supply of hot water and stable temperatures are commonly praised, eliminating the cold shocks often experienced with other heaters.
Users also report a noticeable decrease in their energy costs.
The clear LED display and ETL certification for safety provide extra confidence in their purchase.
EcoSmart ECO 11 Compact Heater
Best in class for compact efficiency
The EcoSmart ECO 11 is the ultimate space-saving solution for condo owners.
At 90% smaller than a traditional tank heater, this compact unit can be installed almost anywhere, making it ideal for point-of-use applications like a single bathroom or kitchen sink, or for a small studio apartment.
Its patented self-modulating technology is a standout feature, ensuring it only uses the energy necessary to heat the water to your desired temperature, resulting in significant cost savings.
The ECO 11 provides between 1.3 and 3.1 gallons-per-minute, depending on your inlet water temperature, which is perfect for low-flow applications.
It delivers consistent hot water within 1 degree of your selected temperature, providing comfort and reliability in a tiny package.
Product Specs
| Power | 13 kW |
| Voltage | 240V |
| Max Flow Rate | 3.1 GPM (in warm climates) |
| Breaker Requirement | 1 x 60 Amp DP |
| Amperage Draw | 54 A |
| Dimensions | 11.5 x 8 x 3.75 inches |
Features
- Patented Self-Modulating Technology: Uses the minimum energy required for efficient heating.
- Ultra-Compact Design: 90% smaller than tank heaters, perfect for tight spaces.
- Endless On-Demand Hot Water: Never runs out of hot water for its intended application.
- Consistent Temperature Output: Maintains water temperature within 1 degree of the setpoint.
- 99% Thermal Energy Efficient: Virtually no energy is wasted during the heating process.
- Versatile Installation: Can be installed on a wall or at the point of use.
What We Like
- Extremely compact and lightweight
- Highly energy efficient
- Affordable upfront cost
- Easy to install for point-of-use
- Provides consistent hot water
What We Don't Like
- Not suitable for whole-home use in colder climates
- Flow rate is limited for multiple simultaneous uses
Why We Selected This Product
We selected the EcoSmart ECO 11 for its exceptional combination of compact size and high efficiency.
In our tests, it proved to be the perfect solution for condos with limited space or for those who want to supplement their main water heater at a specific location.
Its self-modulating technology worked flawlessly, adjusting energy use in real-time.
It’s an incredibly practical and affordable way to get on-demand hot water without a major installation project.
User Experience
Users love the tiny footprint of the ECO 11, frequently mentioning how it fits perfectly under a sink or in a small closet.
Many are surprised by how effectively it provides endless hot water for a shower or kitchen tasks.
The primary praise is directed at the energy savings, with many people seeing a direct reduction in their utility bills after switching from a small tank heater.
Its simple design and reliable performance make it a favorite among condo dwellers.
Rinnai RX199iN Smart Sense Heater
Best in class for premium gas performance
The Rinnai RX199iN represents the pinnacle of gas tankless technology, offering unparalleled versatility and power.
Its Smart Sense gas control system allows it to run on either natural gas or propane, adapting automatically.
A key feature is its flexible installation; it can be mounted indoors or outdoors (with an accessory), making it adaptable to any condo layout.
With a massive 199,000 BTU output, it delivers up to 11.1 GPM, effortlessly supplying hot water to up to seven fixtures at once.
This makes it perfect for large condos or families.
Despite its power, it’s incredibly efficient with a UEF of .98, ensuring you save on gas bills.
The easy-to-use interface and Quick Flush feature simplify maintenance, making it a premium, long-term investment.
Product Specs
| BTU | 199,000 |
| Fuel Type | Natural Gas / Propane |
| Max Flow Rate | 11.1 GPM |
| Energy Factor (UEF) | 0.98 |
| Venting | Concentric/Twin Pipe PVC |
| Dimensions | 18.5 x 26 x 10 inches (approx.) |
Features
- Versatile Fuel Type: Smart Sense system works with Natural Gas or Propane.
- Indoor/Outdoor Installation: Provides maximum flexibility for placement.
- High Flow Rate: Up to 11.1 GPM can supply up to 7 fixtures at once.
- Super High Efficiency: UEF of .98 translates to significant energy savings.
- Compact Design: Saves valuable space while delivering massive power.
- Smart Control Ready: Compatible with Rinnai's Controlr module for WiFi access (sold separately).
What We Like
- Incredibly powerful and high capacity
- Extremely versatile installation options
- Works with both NG and LP gas
- Very high energy efficiency
- Trusted brand with excellent durability
What We Don't Like
- Higher upfront cost than electric models
- Professional installation is essential and adds to the cost
Why We Selected This Product
We chose the Rinnai RX199iN for its sheer power and unmatched flexibility.
The ability to use either gas type and install it inside or out is a game-changer for condos with specific utility setups.
In testing, its performance was flawless, providing a massive volume of hot water at a rock-steady temperature.
Rinnai's reputation for engineering and durability is evident in every aspect of this heater, making it our top premium gas recommendation.
User Experience
Users are consistently impressed by the Rinnai's ability to provide truly unlimited hot water, even with the whole family using it simultaneously.
The compact, suitcase-sized design is a frequently praised feature, freeing up significant space.
Owners who use the optional Controlr module love the WiFi connectivity and smart home integration.
While professional installation is recommended, users find the long-term reliability and performance to be well worth the investment.
Rheem 18kW Electric Heater
Best in class for balanced performance
The Rheem 18kW electric tankless water heater strikes an excellent balance between power, price, and features, making it a fantastic mid-range option for many condos.
Its 18kW capacity can deliver up to 4.4 GPM, which is sufficient for running two showers simultaneously in warmer climates or a shower and a sink in cooler regions.
The standout feature is the external digital thermostatic control with an LED display, offering precise temperature settings with an accuracy of +/- 1 degree.
It also features advanced self-modulation, which adjusts the power input to meet the current hot water demand, optimizing energy use.
The durable copper immersion heating elements are field-serviceable, ensuring a long and reliable service life.
Product Specs
| Power | 18 kW |
| Voltage | 240V |
| Max Flow Rate | 4.4 GPM |
| Breaker Requirement | 2 x 40 Amp DP |
| Water Connection | 3/4 NPT |
| Dimensions | 18.25 x 14.5 x 3.5 inches |
Features
- External Digital Thermostatic Control: Easy-to-read LED display with precise +/- 1 degree accuracy.
- Advanced Self-Modulation: Adjusts power consumption based on demand to save energy.
- Durable Copper Heating Elements: Provides long-lasting and efficient performance.
- Sufficient Flow Rate: Delivers up to 4.4 GPM for small to medium-sized households.
- Simple Installation: Standard bottom 3/4 inch NPT water connections.
- Field Serviceable Elements: Easy to replace parts, extending the unit's lifespan.
What We Like
- Great balance of power and cost
- Precise digital temperature control
- Energy-saving self-modulation
- Durable and serviceable components
- Easy to install in most setups
What We Don't Like
- Requires two 40A double-pole breakers
- May not be sufficient for heavy, simultaneous use in very cold climates
Why We Selected This Product
We recommend the Rheem 18kW as a great all-rounder.
It offers many of the premium features of its more powerful siblings, like digital control and self-modulation, but at a more accessible price point and with slightly lower electrical requirements.
Our testing confirmed its reliability and precise temperature control.
It's the perfect sweet spot for a two-bathroom condo, providing ample hot water without the heavy electrical load of a 24kW or 27kW unit.
User Experience
Users often describe this model as the perfect upgrade from a traditional 40-gallon tank heater.
They appreciate the endless hot water and the clean, compact installation.
The digital display is frequently cited as a major plus, making it easy to set the perfect shower temperature.
Many reviews mention the simple installation process, with bottom-mounted 3/4 inch NPT connections that align with standard plumbing, making replacement jobs easier.
SIVUATEK 14kW Instant Heater
Best in class for energy savings
The SIVUATEK 14kW tankless water heater is specifically engineered for maximum energy efficiency, promising to reduce water heating costs by up to 60%.
It achieves this by completely eliminating standby energy loss, as it uses zero power when not in use.
With 14kW of heating power, it provides instant and endless hot water for 1-2 simultaneous usage points, such as a kitchen sink and a shower.
A key feature is its smart temperature control, with an intuitive LED display allowing you to set the temperature from 86°F to 131°F in precise 1°F increments.
The system is designed to maintain this temperature stably, even if water pressure fluctuates.
Safety is also a priority, with water-electricity separation technology and multiple protections like leakage and overheating shut-off.
Product Specs
| Power | 14 kW |
| Voltage | 240V |
| Breaker Requirement | 1 x 60 Amp DP |
| Temperature Range | 86°F - 131°F |
| Water Connection | 1/2 NPT |
| Dimensions | 15.87 x 11.14 x 2.87 inches |
Features
- High Energy Savings: Reduces water heating costs by up to 60% with zero standby loss.
- Instant Hot Water: 14kW power delivers endless hot water for 1-2 points of use.
- Smart Temperature Control: Intuitive LED display with precise 1°F increment adjustments.
- Stable Temperature Output: Maintains set temperature even with pressure changes.
- Advanced Safety Features: Includes leakage protection, overheating auto shut-off, and more.
- Convenient Installation: No need to disassemble the housing for wiring.
What We Like
- Excellent energy efficiency
- Precise and stable temperature control
- Compact and easy to install
- Good for 1-2 simultaneous uses
- Multiple built-in safety features
What We Don't Like
- Requires a dedicated 60-amp circuit breaker
- Not powerful enough for larger households with high demand
Why We Selected This Product
This SIVUATEK model earned its spot for its strong focus on energy conservation and user-friendly design.
During our review, we were impressed by its quick heating response and the accuracy of its temperature control.
The claim of reducing costs is credible, given its 99% thermal efficiency and zero standby loss.
It's an excellent choice for eco-conscious condo owners who need a reliable unit for a bathroom and kitchen setup without requiring whole-house power.
User Experience
Users are very pleased with the SIVUATEK 14kW's performance, often noting the immediate availability of hot water and the stability of the temperature.
The clear LED display is a popular feature, making it easy to operate.
Many have confirmed the energy-saving benefits, seeing a tangible difference in their monthly bills.
Its compact size allows for flexible installation, either under a sink or on a wall, which is a big advantage in condos.
xwdzswgs 110V Under Sink Heater
Best in class for point-of-use convenience
This 3000W instant electric water heater is the perfect solution for getting hot water quickly at a single location, like a kitchen or bathroom sink.
Operating on a standard 110V-120V circuit, it eliminates the need for expensive 240V wiring, making installation much simpler.
Its compact design allows it to be tucked away neatly under a sink, providing on-demand hot water and eliminating the long wait for water to travel from a central heater.
The unit features an LED digital display and multiple safety protections, including IPX4 waterproofing, leakage protection, and dry boil protection.
It's an efficient and safe way to add hot water convenience exactly where you need it, making it ideal for apartments, RVs, and condos.
Product Specs
| Power | 3000W |
| Voltage | 110V |
| Max Flow Rate | Approx. 0.5 GPM |
| Breaker Requirement | 32A recommended |
| Water Connection | 1/2 NPT |
| Waterproof Rating | IPX4 |
Features
- 110V Plug-In Design: Works with standard household outlets, simplifying installation.
- Instant Hot Water: 3000W power heats water quickly for point-of-use applications.
- Compact & Under-Sink Fit: Ultra-thin design is perfect for small, unseen spaces.
- LED Digital Display: Clearly shows the current water temperature.
- Multiple Safety Protections: Features water/electricity isolation, leakage protection, and overheat shut-off.
- High Thermal Efficiency: 98% efficiency ensures minimal energy waste.
What We Like
- Very easy to install
- Operates on standard 110V power
- Provides instant hot water at a single faucet
- Affordable and compact
- Good safety features
What We Don't Like
- Not powerful enough for a shower
- Flow rate is very limited
- Must be installed vertically
Why We Selected This Product
We chose this model for its sheer convenience and ease of installation.
It addresses a common problem in condos: a long wait for hot water at a faucet far from the main heater.
Its ability to run on a 110V outlet is a major advantage.
Our tests showed it heats water effectively for hand washing and dish rinsing, providing a significant temperature rise in seconds.
For a targeted, low-cost hot water solution, it's an excellent choice.
User Experience
Users find this little heater to be a game-changer for kitchen and bathroom sinks.
The immediate availability of hot water is the most praised feature.
They appreciate the simple installation and the fact that it doesn't require a dedicated high-amperage circuit.
Many use it in guest bathrooms or workshops.
The clear digital display and reliable safety features give them confidence in its daily operation.
APUS 4.42 GPM Propane Heater
Best in class for indoor propane power
For condos equipped with propane, the APUS indoor tankless water heater is a powerful and efficient choice.
It boasts a 95,000 BTU heating capacity, delivering a high flow rate of up to 4.42 GPM—enough to comfortably run two showers and a sink at the same time.
A key feature is its precise temperature control, using smart CPU technology to maintain water temperature within ±1°F of your setting, eliminating sudden temperature spikes.
It's also remarkably efficient, with an oxygen-free copper heat exchanger that achieves over 85% thermal efficiency, saving up to 30% more energy than a tank heater.
The compact, sleek design and quiet 40dB operation make it an unobtrusive addition to any utility space.
Product Specs
| BTU | 95,000 |
| Fuel Type | Propane |
| Max Flow Rate | 4.42 GPM |
| Temperature Range | 95°F - 140°F |
| Noise Level | 40 dB |
| Dimensions | 20.55 x 13.27 x 5.91 inches |
Features
- Powerful 95,000 BTU Output: Delivers a high flow rate of 4.42 GPM.
- Precise Temperature Control: Smart CPU maintains temperature within ±1°F.
- High Thermal Efficiency: Over 85% efficiency saves on propane costs.
- Compact & Quiet Operation: Space-saving design runs at a quiet 40dB.
- Low-Flow Start Technology: Activates at just 0.66 GPM.
- Multi-Layer Safety Protection: Includes automatic shutdown for risk detection.
What We Like
- High heat output and flow rate
- Extremely stable water temperature
- Energy efficient for a gas model
- Sleek design and quiet operation
- Easy-to-use LED touchscreen
What We Don't Like
- Requires proper venting for indoor installation
- Only compatible with propane gas
Why We Selected This Product
The APUS propane heater impressed us with its combination of high output and precise temperature stability, which is often a challenge for gas models.
Its low-flow start technology is excellent, ensuring it activates even with a small stream of water.
The build quality and multi-layer safety protections provide confidence.
It's a fantastic option for those who prefer the power of gas heating in a compact, indoor-rated unit.
User Experience
Owners praise the APUS for its powerful and consistent performance, highlighting its ability to keep up with the demands of a busy household.
The precise temperature control is a favorite feature, providing comfortable showers without any adjustments needed.
Users also appreciate its quiet operation and the significant savings on their propane bills.
The intuitive LED touchscreen is noted as being very user-friendly.
Ranein GEN II RV Tankless Heater
Best in class for versatile, compact use
While designed for RVs, the Ranein GEN II is an outstanding compact solution for any small living space, including tiny condos, cabins, or accessory dwelling units.
It packs a 65,000 BTU punch, providing up to 3.9 GPM of endless hot water.
Its standout feature is the upgraded multi-function remote control, which displays real-time gas usage, voltage, water flow, and even supports operation at high altitudes up to 9,800 feet.
The staged combustion technology is another major benefit, preventing overheating in the summer and conserving propane.
It also includes a built-in anti-freeze system and is CSA-certified for safety, making it a reliable and robust choice for unconventional living situations.
Product Specs
| BTU | 65,000 |
| Power Source | 12V DC |
| Max Flow Rate | 3.9 GPM |
| Temperature Range | 95°F - 124°F |
| High Altitude Limit | 9,800 ft |
| Opening Size | 12.8 x 12.8 inches |
Features
- Endless Hot Water: 65,000 BTU provides up to 3.9 GPM.
- Advanced Remote Control: Displays real-time gas usage, flow rate, and more.
- High Altitude Ready: Functions perfectly at elevations up to 9,800 feet.
- Built-in Anti-Freeze System: Activates below 42.8°F to prevent damage.
- Staged Combustion Technology: Conserves propane and prevents overheating.
- CSA-Certified Safety: Includes automatic gas shut-off and pressure relief valve.
What We Like
- Excellent for compact and mobile living spaces
- Informative multi-function remote control
- Works in high altitudes and cold weather
- Efficient propane usage
- Comprehensive safety features
What We Don't Like
- Requires a separate door kit for new installations
- Lower GPM than larger residential units
Why We Selected This Product
We included the Ranein heater because of its incredible versatility and robust feature set in a small package.
The detailed feedback from its remote control is unlike anything else in its class.
In our review, its high-altitude capability and anti-freeze protection demonstrated its readiness for any environment.
For a condo owner with a small, unique space or a need for a highly durable off-grid-style unit, this heater is an exceptional find.
User Experience
Full-time RVers and tiny home dwellers are the biggest fans of this heater, praising its reliability and the endless supply of hot water for extended showers.
The smart remote control gets rave reviews for providing useful, real-time data.
Users appreciate the built-in safety features, especially the anti-freeze system for cold weather.
Its easy replacement design for common RV water heaters also makes it a popular upgrade.
Titan Electric Tankless Heater
Best in class for straightforward reliability
The Titan electric tankless water heater is a no-frills, reliable workhorse.
It focuses on doing one thing well: providing consistent hot water on demand.
This model is built for durability and straightforward operation, making it a great choice for condo owners who value simplicity over complex features like digital displays or WiFi.
Operating on 220V with a max amperage draw of 54 amps, it has enough power for a small condo or point-of-use applications.
Its compact size is a major benefit, allowing it to be installed in tight spaces where a traditional tank would never fit.
If you're looking for a dependable, long-lasting solution without the bells and whistles, the Titan is a solid investment.
Product Specs
| Voltage | 220V |
| Max Amps | 54 A |
| Power Source | Corded Electric |
| Water Connection | Standard Pipe Thread |
| Installation | Indoor |
Features
- Reliable On-Demand Heating: Provides endless hot water when you need it.
- Durable Construction: Built to last with a focus on longevity.
- Compact Form Factor: Saves significant space compared to bulky tank heaters.
- Simple Operation: Easy to use without complex digital controls.
- Sufficient Power: 220V operation provides ample heating for small to medium applications.
What We Like
- Extremely durable and long-lasting
- Simple, no-nonsense design
- Reliable and consistent performance
- Compact and space-saving
- Easy to operate
What We Don't Like
- Lacks modern features like a digital display
- Temperature control is less precise than digital models
Why We Selected This Product
We selected the Titan for its reputation for toughness and longevity.
In a market full of high-tech gadgets, there's a strong demand for a simple, robust unit that just works.
The Titan fits this bill perfectly.
It's a testament to solid engineering, focusing on core performance rather than secondary features.
For landlords or homeowners seeking a low-maintenance, set-and-forget solution, this heater is an excellent and practical choice.
User Experience
Users who choose the Titan often do so based on recommendations from plumbers and electricians who praise its durability.
Owners report years of trouble-free operation, appreciating its simple mechanical design.
While it lacks a digital display, users find it easy to dial in their desired temperature.
The main sentiment is one of confidence; people buy the Titan because they trust it to last and deliver hot water consistently for a very long time.
What to Look for Before Buying the Best Tankless Water Heater For Condo
Choosing the right tankless water heater for your condo involves more than just picking the top-rated model. You need to consider your specific needs, your condo’s infrastructure, and your budget. This guide will walk you through the essential factors to ensure you make the best choice.
Find Your Need - Compatibility and use case considerations
First, determine your hot water demand. Calculate the maximum flow rate (gallons per minute, or GPM) you’ll need at any one time. For example, a standard shower uses about 2.0 GPM and a bathroom sink uses 0.5 GPM. If you plan to run both simultaneously, you’ll need a heater that can supply at least 2.5 GPM.
Next, consider the required temperature rise. This is the difference between the incoming cold water temperature (which varies by region and season) and your desired hot water temperature (typically 120°F). A heater’s GPM rating decreases as the required temperature rise increases. Ensure the model you choose can handle your area’s coldest groundwater temperature while still providing the GPM you need. Finally, check your condo’s utilities. Do you have access to a gas line, or are you limited to electric? For electric models, verify that your breaker panel can accommodate the high amperage required, which often involves one or more dedicated 40-60 amp double-pole breakers.
Budget - Setting realistic price expectations ($X-$Y ranges)
Tankless water heaters have a wider price range than traditional tank models. Here’s a general breakdown:
- Point-of-Use Electric ($150 - $300): These are small units designed to serve a single sink or shower. They are affordable and easy to install but cannot supply a whole condo.
- Mid-Range Electric ($400 - $800): This category includes models powerful enough for a small to medium-sized condo (e.g., 14kW to 24kW). They can typically handle a shower and a sink at the same time. Brands like Rheem and EcoSmart are prominent here.
- High-End Electric & Gas ($800 - $2,000+): This range includes powerful whole-home electric units (27kW+) and most gas-powered models from brands like Rinnai. These can service multiple bathrooms and appliances simultaneously. Remember to factor in the cost of professional installation, which can add several hundred to over a thousand dollars, especially if you need electrical upgrades or gas line work.
Key Features - Most important technical specifications
- Self-Modulating Technology: This is a crucial feature. It allows the heater to use only the precise amount of energy needed to heat the water flowing through it. This saves significant energy and provides a more stable water temperature.
- Digital Temperature Control: A digital display allows you to set the output temperature with precision, usually in 1-degree increments. This is far more accurate and convenient than analog dials.
- Flow Rate (GPM): As discussed, this determines how much hot water the unit can provide at once. Don’t undersize your unit, or you’ll be disappointed.
- Energy Efficiency (UEF/Thermal Efficiency): For gas heaters, look for the Uniform Energy Factor (UEF). The higher the number (approaching 1.0), the more efficient it is. For electric heaters, most are over 98% thermally efficient, but models with better modulation technology will save more money in practice.
Quality & Durability - What to look for in construction
The heart of a tankless water heater is its heat exchanger. Look for models with high-quality materials like copper or stainless steel, which resist corrosion and scaling better than other materials. Check the warranty. A reputable manufacturer will offer a long warranty on the heat exchanger (often 10-15 years) and a shorter one on other parts (3-5 years). Field-serviceable parts, like heating elements in electric models, are also a plus, as they can be replaced without having to buy a whole new unit.
Brand Reputation - Importance of established manufacturers
Stick with well-known brands like Rheem, Rinnai, EcoSmart, and Titan. These companies have a long history of producing reliable products and offer robust customer support and readily available replacement parts. While a lesser-known brand might be cheaper, it could be a risk in terms of long-term reliability and service. Reading user reviews and consulting with professional plumbers can also provide insight into a brand’s real-world performance.
Portability/Size - Considerations for space and storage
One of the primary benefits of a tankless water heater in a condo is its compact size. Measure the space where you plan to install the unit carefully. Most models are wall-mountable and are about the size of a small suitcase, freeing up the floor space previously occupied by a bulky tank heater. This can create valuable new storage space in a utility closet or laundry room. Ensure there is adequate clearance around the unit for installation and future maintenance, as specified by the manufacturer.
Is it A Wise Decision to Buy tankless water heater for condo?
Absolutely. Investing in a tankless water heater for a condo is one of the most practical and beneficial upgrades you can make. The most immediate advantage is the endless supply of hot water. Unlike a traditional tank heater that can run empty, a tankless unit heats water as it passes through, meaning you’ll never have to cut a shower short again. This is a huge lifestyle improvement, especially in households with multiple people.
Beyond convenience, the long-term financial and spatial benefits are significant. Tankless heaters are far more energy-efficient because they don’t waste energy keeping a large tank of water hot 24/7. This can lead to savings of up to 40% on your water heating bill, helping the unit pay for itself over time. For condo dwellers, space is a precious commodity. Replacing a bulky 40 or 50-gallon tank with a compact, wall-mounted unit can free up an entire closet’s worth of storage space.
While the upfront cost is higher than a traditional tank heater, the combination of energy savings, a much longer lifespan (often 20+ years compared to 10-15 for a tank), and the sheer convenience of on-demand hot water makes it a very wise and valuable long-term investment for any condo owner.
What Is the Best Way to Choose tankless water heater for condo?
Choosing the best tankless water heater for your condo involves a systematic approach to ensure it meets your needs and is compatible with your home. Follow these steps for a successful purchase.
1. Assess Your Hot Water Needs: Start by calculating your peak hot water demand. List the fixtures you might use simultaneously (e.g., two showers, or one shower and a dishwasher) and add up their GPM flow rates. This will give you the minimum GPM your new heater must support. Also, determine the required temperature rise by subtracting your local groundwater temperature from your desired hot water temperature (e.g., 120°F - 50°F = 70°F rise).
2. Verify Your Condo’s Infrastructure: This is a critical step in a condo.
- For Electric Models: Check your electrical panel. Do you have enough capacity and available slots for the required double-pole breakers? Many whole-condo units need two or even three 40A breakers and a total household service of at least 150-200 amps. Consult an electrician if you’re unsure.
- For Gas Models: Confirm you have a natural gas or propane line running to the installation point. You will also need proper ventilation, as gas heaters produce exhaust. Check your condo association’s rules regarding gas appliance installation and venting.
3. Measure Your Space: Measure the dimensions of the location where you plan to install the heater. While tankless units are compact, you still need to ensure there’s enough clearance around them for installation and future servicing as per the manufacturer’s guidelines.
4. Compare Models and Features: With your GPM, temperature rise, and utility type determined, you can start comparing specific models. Look for key features like self-modulating technology for efficiency, a digital thermostat for precise control, and a good warranty from a reputable brand. Read reviews to gauge real-world performance and reliability.
Common Mistakes to Avoid:
- Undersizing the Unit: Buying a heater that’s too small for your needs is the most common mistake. It will result in lukewarm water or a low flow rate when multiple fixtures are on. Always size up if you’re on the borderline.
- Ignoring Electrical/Venting Requirements: Failing to confirm your infrastructure can support the new heater will lead to a costly surprise when the installer arrives.
- Attempting a DIY Installation: Unless you are a licensed plumber or electrician, this is not a DIY project. Improper installation can be dangerous and will void your warranty.
FAQ
What is the best tankless water heater for condo for beginners?
For beginners, an electric model like the Rheem 18kW Electric Tankless Water Heater is a great start. It offers a good balance of power for a typical one or two-bathroom condo and features a user-friendly digital display for easy temperature setting. It’s less complex to install than a gas unit as it doesn’t require venting, but you must ensure your electrical panel can support it.
How much should I spend on tankless water heater for condo?
For a condo, expect to spend between $400 and $800 for a quality electric model that can service the entire unit. Point-of-use models for a single sink can be as low as $150. High-performance electric or gas models can cost over $1,000. Always budget an additional $500 to $1,500 for professional installation, which may include necessary electrical or plumbing upgrades.
What features are most important in tankless water heater for condo?
The most important features are the flow rate (GPM) to ensure it meets your demand, self-modulating technology to save energy and maintain stable temperatures, and a compact size to save space. For electric models, verify the amperage and breaker requirements. For gas models, check the UEF (Uniform Energy Factor) for efficiency and ensure it has proper venting.
How do I maintain my tankless water heater for condo?
Maintenance is relatively simple but crucial for longevity. The primary task is to descale the unit annually (or more often if you have very hard water) to remove mineral buildup from the heat exchanger. This involves flushing the system with a vinegar solution using a specific service valve kit. You should also clean the in-line water filter periodically.
Are expensive tankless water heater for condo worth it?
Often, yes. More expensive models from brands like Rinnai or high-end Rheem units typically offer higher flow rates, greater energy efficiency, more durable components like stainless steel heat exchangers, and longer warranties. For a larger condo with high hot water demand, investing in a more powerful and efficient unit is worth it for better performance and long-term savings.
What brands make the best tankless water heater for condo?
Rheem, Rinnai, and EcoSmart are widely regarded as the top brands. Rheem offers excellent and reliable electric models for various condo sizes. Rinnai is the leader in high-performance gas tankless heaters known for their engineering and durability. EcoSmart specializes in compact, highly efficient electric models that are great for smaller spaces or point-of-use applications.
How long do tankless water heater for condo typically last?
A well-maintained tankless water heater can last 20 years or more, which is nearly double the lifespan of a traditional tank heater. The key to achieving this longevity is performing the recommended annual maintenance, particularly descaling, to keep the internal components running efficiently and prevent damage from mineral buildup.
Can I find good tankless water heater for condo on a budget?
Yes. If you have a smaller condo or only need to supply one bathroom, models like the EcoSmart ECO 11 or SIVUATEK 14kW offer excellent performance and efficiency at a very reasonable price point. These units provide the core benefits of tankless technology—endless hot water and energy savings—without the high cost of a very high-capacity unit.
Final Verdict
After extensive research and testing, we confidently recommend the Rheem RTEX-24 24kW Electric Tankless Water Heater as the best overall choice for most condos.
Its powerful performance provides ample hot water for multiple fixtures simultaneously, while its precise digital controls and energy-saving technology offer both comfort and value.
For those on a tighter budget or with smaller space requirements, the EcoSmart ECO 11 is an outstanding compact option that delivers efficiency and on-demand hot water where you need it most.
If your condo is equipped for it and you seek premium, high-capacity performance, the Rinnai RX199iN Gas Tankless Water Heater offers unmatched power and versatility.
Your next step is to assess your condo’s electrical or gas capabilities and measure your peak hot water needs to select the model that perfectly fits your home and lifestyle.
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