Top 8 Tankless Hot Water Heaters for Cold Climates: Stay Cozy All Winter Long!

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Hey there! Are you tired of shivering in the cold during the winter months? Well, worry no more! In this roundup post, I've got you covered with the top 8 tankless hot water heaters that are perfect for cold climates. Say goodbye to freezing showers and hello to staying cozy all winter long. Let's dive right in and find the perfect solution to keep you warm!

1

Airthereal Tankless Water Heater – 27kW, 240V

 in stock
Amazon.com
8.7
Efficient and versatile
The Airthereal Electric Tankless Water Heater from the Evening Tide series is an efficient and long-lasting on-demand water heating solution that saves energy by heating water only when it is needed. Its compact size allows for installation anywhere, making it suitable for providing hot water for up to 3 showers. However, it does require a specific electrical setup and some users have reported issues with power supply in existing homes.
Efficient and Convenient
  • Efficient and long-lasting on-demand water heating technology
  • Saves energy by only heating water when it is needed
  • Compact size allows for installation in any location
  • Suitable for providing hot water for up to 3 showers
Drawbacks
  • Requires a specific electrical setup with 3x 40A Double Pole Circuit Breakers
  • Some users have reported issues with power supply, especially in existing homes

The Airthereal Electric Tankless Water Heater is the perfect solution for families who want endless hot water on demand. With no preheating required, you can enjoy a hot shower anytime, even if you're the last one in the family to use it. It's easy to set up if you know what you're doing, but keep in mind that you'll need to have a 3x 40A Double Pole Circuit Breaker. This tankless water heater is efficient and long-lasting, making it a great choice for households that don't use a lot of hot water. However, if you're replacing an existing hot water tank, make sure to check if the power supply is working properly.

Efficient and Powerful Heating Solution
  • Endless on-demand hot water
  • Self modulates to save energy use
  • Small enough to install anywhere
  • Suitable for 3 showers
2

EcoSmart ECO 11 Tankless Water Heater

 in stock
Amazon.com
8.7
Top-notch choice
The EcoSmart ECO 11 Electric Tankless Water Heater is an energy-efficient and high-quality product that provides endless on-demand hot water with controlled flow rates and consistently monitored water temperature. It features adjustable heating temperature and a space-saving design, making it a versatile option for installation in various locations. However, it may require a dedicated 60 AMP circuit for optimal performance, and there have been some reports of minor leaks from the left side connector. Overall, it is a reliable and efficient choice for those looking for a tankless water heater.
Energy-efficient and cost-saving
  • Energy efficient
  • Good quality and solid construction
  • Adjustable heating temperature
  • Space-saving design
  • Can be installed in a variety of locations where power, cold, and hot lines are available
Drawbacks
  • May require a dedicated 60 AMP circuit for optimal performance
  • Some users have experienced minor leaks, particularly from the left side connector

The EcoSmart ECO 11 Electric Tankless Water Heater is a versatile and efficient solution for providing hot water on demand. Whether you live in a colder climate and need hot water for one shower or in a warmer climate where it can handle two showers, this water heater has you covered. With a temperature range of 80-140°F, you can easily adjust the water to your desired comfort level. The patented self-modulating technology ensures that you have consistent hot water when you need it, without any fluctuations in temperature. Additionally, the EcoSmart ECO 11 is designed for efficiency, ensuring that you have hot water within 1 degree of the selected temperature. With its energy-saving features and reliable performance, the EcoSmart ECO 11 is a top choice for anyone in need of an electric tankless water heater.

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Efficient
  • Endless on-demand hot water
  • Consistent hot water with no limit
  • Continuously monitored water temperature
  • Controlled flow rates for efficiency
  • Performance within 1 degree of selected temperature
  • Energy-saving special features
3

Airthereal Electric Tankless Water Heater

 in stock
Amazon.com
8.2
Overall
The Airthereal Electric Tankless Water Heater, Evening Tide series, is a compact and visually appealing unit that provides endless on-demand hot water for sinks and faucets. Its energy-saving self-modulating feature and responsive customer service make it a great choice, despite a few isolated incidents of failure in the first week of operation. However, it may struggle to keep up with a fully-on shower.
Efficient Heating Solution
  • Easy installation process
  • Good hot water flow for washing off sandy feet or dirty dogs
  • Responsive customer service
  • Compact and visually appealing design
  • Provides endless on-demand hot water
  • Energy-saving self-modulating feature
  • Suitable for use with sinks and faucets
Weaknesses
  • Unable to keep up with a fully-on shower
  • One unit failed in the first week of operation

The Airthereal Electric Tankless Water Heater from the Evening Tide series is a reliable and efficient solution for providing endless on-demand hot water. With its 9kW power and 240 volts, it ensures that you never have to worry about running out of hot water again. This tankless water heater is designed to self-modulate, saving energy and reducing your utility bills. Whether you need hot water for your sink or faucet, this compact and easy-to-install unit will deliver consistent and comfortable hot water whenever you need it. Say goodbye to cold showers and hello to endless hot water with the Airthereal Electric Tankless Water Heater.

Efficient and Convenient Heating Solution
  • Endless on-demand hot water
  • Self-modulates to save energy use
  • Suitable for sink and faucet use
  • 9kW power for efficient water heating
  • Operates at 240Volts for optimal performance
4

Rheem Prestige Tankless Water Heater – RTGH-RH10DVLP

$1,232.61  in stock
Amazon.com
as of September 9, 2025 4:33 am
8.1
Reliable and efficient
The Rheem Prestige Condensing Tankless Indoor Liquid Propane Water Heater with Built-in Recirculation 10.0 GPM – RTGH-RH10DVLP offers instant hot water delivery, energy efficiency, a compact design, and water and gas leak detection. However, it may have limited availability in certain regions and a higher upfront cost compared to traditional water heaters. Overall, it is a reliable and efficient option for those looking for a space-saving and convenient water heating solution.
Efficient and Reliable
  • Instant hot water delivery
  • Energy efficient and water-saving
  • Compact and space-saving design
  • Water and gas leak detection
Common Issues
  • Limited availability in certain regions
  • Higher upfront cost compared to traditional water heaters

The Rheem Prestige Condensing Tankless Indoor Liquid Propane Water Heater with Built-in Recirculation 10.0 GPM – RTGH-RH10DVLP is a top-of-the-line water heater that provides continuous hot water with high efficiency. Its built-in recirculation pump ensures instant hot water only when needed, saving both time and energy. With industry-leading low flow activation and a minimum flow rate of .50GPM, this water heater is designed to meet your hot water needs while minimizing waste. It also boasts a range of safety features including a flame sensor, overheat cut off switch, and gas and water leak detectors. With its compact design, this tankless water heater is perfect for replacing a traditional tank and saving valuable space. It is backed by a warranty of 12 years for the heat exchanger, 5 years for parts, and 1 year for labor. Professional installation is required for warranty coverage.

Efficient and Dependable Performance
  • Instant hot water delivery
  • Energy efficient and water-saving
  • Compact and space-saving design
  • Water and gas leak detection
5

FOGATTI Propane Gas Tankless Water Heater

 in stock
Amazon.com
7.8
Verdict: Efficient and Convenient
The FOGATTI Propane Gas Tankless Water Heater, Indoor 6.3 GPM, 145,000 BTU White Instant Hot Water Heater, InstaGas Comfort 145 Series is an easy-to-install and attractive unit that provides instant hot water. While it may have limited customer support and potential installation challenges, it offers efficient water heating and comes with necessary installation accessories.
Efficient and Reliable
Cons
  • Drawbacks:
  • Limited customer support and slow response time when experiencing issues with the unit
  • Some users experienced initial installation challenges, such as disconnected igniter wire

The FOGATTI Propane Gas Tankless Water Heater is a sleek and straightforward solution for your hot water needs. With its tankless design, you can enjoy instant hot water without the need for preheating. This model boasts a 6.3 GPM flow rate and a powerful 145,000 BTU, ensuring a steady supply of hot water for your household. It's important to note that professional installation is recommended to ensure compliance with local building and plumbing codes. Overall, this water heater offers reliable performance and unlimited hot water, making it a great choice for any home.

Efficient and Instant Hot Water
  • Tankless design for instant hot water
  • Indoor installation for convenience
  • 6.3 GPM flow rate for efficient water heating
  • 145,000 BTU power output for fast heating
  • Propane gas fueled for energy efficiency
  • InstaGas Comfort 145 Series for enhanced comfort
6

Portable Gas Tankless Water Heater

$169.99
$144.49
 in stock
Amazon.com
as of September 9, 2025 4:33 am
7.3
Final Verdict: Overall Impressive
The Tankless Water Heater 5.26GPM is a portable and easy-to-install propane water heater that provides hot water quickly, making it a great option for camping trips or boat cabins. With features like a digital display and multi-protection, it offers convenience and safety. However, some customers have reported issues with the LED not lighting up and the shower head quality.
Efficient and Convenient
  • Easy to install and remove
  • Digital temperature gauge
  • Provides hot water quickly
  • Portable and suitable for camping trips or boat cabins
Limitations
  • LED on the bottom doesn't light up when turned on
  • Shower head is cheap quality and fell apart after a few weeks

The Tankless Water Heater 5.26GPM 20L Outdoor Portable Gas Hot Water Heater is a premium water heater with multiple safety features like a flame failure device, anti-freezing protection, and over heating protection. With just 3.6PSI of water pressure, it can output 5.26 gallons of hot water per minute. It has received positive reviews for its ability to heat water quickly and efficiently, surpassing the performance of other heaters. Some customers have even replaced their hot tub heaters with this water heater, experiencing better heat and lower energy consumption. The digital display and temperature gauge are also appreciated features. However, there have been some reports of the shower head being of lower quality and certain technical issues arising after a few months of use. Nonetheless, the seller has been praised for their excellent customer service, offering full refunds and ensuring customer satisfaction. Overall, the Tankless Water Heater 5.26GPM 20L Outdoor Portable Gas Hot Water Heater is a reliable and efficient option for camping trips, boat cabins, and other outdoor activities.

Convenient Hot Water Anywhere
  • CSA Approved Regulator
  • Flame failure device
  • Anti-freezing protection
  • Over heating protection
  • Digital display
  • Portable
$144.49
$169.99
in stock
as of September 9, 2025 4:33 am
Amazon.com
7

TC-Home Portable Tankless LPG Water Heater

 in stock
Amazon.com
7.1
My Conclusion: Overall
The TC-Home Portable 6L Water Heater Tankless LPG 1.6 GPM Propane Gas Outdoor Digital Display Instant Hot Water Heater is a cost-efficient and portable option that provides instant hot water. It features a digital display and has a thermal efficiency of at least 80%. However, it comes with poor installation instructions and coarse temperature and flow adjustments.
Efficient and Convenient
  • Cost efficient
  • Digital display
  • Instant hot water
  • Portable
Limitations
  • Poor installation instructions
  • Coarse temperature and flow adjustments

The TC-Home Portable 6L Water Heater Tankless LPG 1.6 GPM Propane Gas Outdoor Digital Display Instant Hot Water Heater is a convenient and efficient solution for outdoor camping or patio showers. With a capacity of 6L per minute (1.6 GPM) and a thermal input of 12KW, it provides a steady supply of warm water even in temperatures as low as -8℃. The water heater is designed to be safe and cost-efficient, making it a great option for enjoying hot water showers before getting into your swim spa or for other outdoor activities. The installation instructions could be improved, but with the right adjustments and accessories, such as a low-pressure gas valve and a water valve between the heater and the shower head, it performs well. Overall, it is a reliable and quality water heater for its intended purpose.

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Efficient and Convenient Water Heating
  • Gas Type: LPG (PROPANE)
  • Capacity: 6L/min (1.6GPM)
  • Outdoor Camping Water Heater
  • Working temperature: -8-45℃
  • Thermal input: 12KW
  • Thermal efficiency: ≥80%
8

3500W Tankless Electric Water Heater – Instant Hot Water, Automatic Control, Self-Test – Home Kitchen

 in stock
Amazon.com
7.1
Innovative and reliable
The 3500W Tankless Water Heater Electric is a compact and efficient option for heating water in your home kitchen. It heats up quickly and performs better than previous models, with easy temperature control. However, some users have experienced issues with tripped breakers and water leakage.
Efficient and Convenient
  • Performs better than previous water heater
  • Easy to operate and change temperature
  • Heats up quickly
  • Compact size
Limitations
  • Trips breakers even when running solo
  • Uncapped unit leaked water and had fingerprints and residue

This 3500W Tankless Water Heater Electric is a fantastic choice for those looking to have instant hot water in their home. With its 3.5KW heating system, it can continuously supply hot water at your desired temperature throughout the day, without any standby energy consumption. Changing the temperature is a breeze, and it heats up quickly, providing you with warm water whenever you need it. Plus, it's the perfect size and comes at a great price, making it a highly recommended option.

Note: One of the reviews mentioned leaking water and fingerprints on the unit. Please make sure to inspect the product upon delivery and contact customer support if you encounter any issues.

Powerful and Convenient Water Heating
  • 3.5KW heating system
  • Instantaneous hot/warm water
  • Preset temperature control
  • No standby energy consumption
  • No waiting for tank to fill up
  • Smart self-modulating technology

The Top Tankless Hot Water Heater for Cold Climates: My Expert Reviews for 2020

Step-by-Step Guide to Maximizing the Efficiency of Your Tankless Hot Water Heater in Cold Climates

  • First and foremost, make sure to hire a professional to install your tankless hot water heater. They will ensure that it is installed correctly and in accordance with the manufacturer's guidelines. This will help avoid any potential issues or safety hazards
  • Familiarize yourself with the temperature settings of your tankless hot water heater. Most models allow you to adjust the water temperature to your desired level. Keep in mind that in cold climates, you may need to set a slightly higher temperature to ensure hot water is readily available
  • Regular maintenance is crucial to keep your tankless hot water heater functioning optimally. Follow the manufacturer's recommended maintenance schedule, which often includes descaling the unit to prevent mineral buildup. Additionally, if you live in an area where freezing temperatures occur, make sure to properly winterize your tankless hot water heater to prevent any damage
  • Remember, always consult your specific tankless hot water heater's user manual for detailed instructions and guidelines
Steve Donaldson Master HVAC technician
Steve DonaldsonMaster HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

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5 Comments
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  1. I’m glad you mentioned the energy efficiency of these heaters. It’s important for me to save on energy costs in the long run.

  2. Great article! I live in a cold climate and have been considering getting a tankless hot water heater. This list is really helpful!

  3. I wish there were more details about the installation process for each heater. It would be helpful to know if it’s something I can do myself or if I need to hire a professional.

  4. I have never heard of these tankless hot water heaters before. It’s good to know there are options specifically for cold climates.

  5. I appreciate that you included the pros and cons for each heater. It makes it easier to compare and make a decision.

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