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Top 5 Gas Tankless Water Heaters For Residential Water Heating

Tankless water heaters are using tank-less technology for water heating. Tankless appliances are also called on demand and instant hot water heaters as they produce hot water on demand and instant.

The main advantage of these tankless water heaters when comparing them to the storage tank type is the on demand and continuous hot water flow with an endless supply, less energy consumption, high percentage of the recyclable replacement parts, easy troubleshooting due to the sophisticate electronics and worry-free service.

The size of the tankless water heater you want to buy as with the storage tank heaters depends on demand, the size of your family and home. It is not measured by the gallons stored inside the tank but by the flow it delivers the hot water. If your home is large in size and one tankless unit is not enough, you can use a multi-system set-up and link several water heaters into one system.

Majority of these tankless models are whole house with higher GPM (gallons per minute) flow rate while supplying more than one application at a time, while smaller units are mainly for point of use application.

There are also some manufacturers that offer economic residential and commercial grade combi boilers or hot water heaters to be used for space heating and water heating at the same time. You can find many manufacturers of these combi boilers or water heaters in Europe.

Best 5 Tankless Water Heaters Brands

Below is the list of the best residential tankless water heaters, per our selection, that are Energy Star qualified, and based on the latest technology, features and benefits it offers:

• Noritz

• Rinnai

• Bosch

• Paloma

• Rheem

1. Noritz tankless water heaters are using the most superior and innovative technology and they can provide 83-94% of thermal efficiency. All Noritz tankless water heaters are constructed to meet strict Energy Star requirements, requirements for low greenhouse gases, energy and space conservation.

Noritz water heaters are designed to be safe and reliable, thanks to the electronic system called Advanced Q Function.

Dual flame burner is using the latest combustion technology that is electronically controlled providing hot water with very low temperature fluctuation, maximizing the heat output and maintaining high efficiency.

Commercial grade heat exchanger and Turbo Flow are also part of this great engineering...

2. Rinnai is another high class tankless water heaters manufacturer from Japan. Rinnai tankless water heaters are "green" with reduced energy use, water consumption NOx and CO2 emission. With an average longevity of 20 years and high percent of replaceable and recyclable components, less waste goes on landfills.

Rinnai water heaters have been voted #1 of all water heating system manufacturers in the "Most Popular Products" builder's magazine.

3. Bosch tankless water heater models can be found as Aquastar gas tankless and Powerstar electrical water heaters and for the whole house and point of use applications.

Bosch technology provides life expectancy of an average 20 years and great number of replaceable parts. Its main advantages are its high efficiency Ceramat Burner, real-time diagnostic for troubleshooting and failure codes for easy diagnostics and repair.

The most interesting model is 1600 because of its uniqueness in hydro-generated ignition, with an energy independent technology. It uses a small turbine wheel to create enough electricity for lighting the burner.

4. Paloma is among top five brands because of its performance and efficiency, available features and reliability.

Paloma water heaters are using an ICAD system, Incomplete Combustion Avoidance Device to monitor and optimize gas combustion. It is also used to prevent dangerous carbon monoxide production by shutting the water heater down.

Overheat Limiter Wrap or fire protection sensor is used to provide protection against risk of fire, by surrounding the combustion chamber with a plastic film and detecting overheating around heat exchanger.

Flame Failure Protection and Anti-boil Protector are other two safety elements that are designed and implemented in Paloma water heaters for the unit and your protection.

5. Rheem tankless water heaters are award winning water heating systems, and certified by GAMA, an independent testing agency for government standards and certifications. Rheem models are equipped with Rheem Exclusive Guardian SBT a sensing burner technology and the Exclusive Guardian OFW, overheat film wrap, both of them designed for safety and better performance.

With an EZ-Link cable two of the Rheem unit can be connected into one, or up to 20 units using the multi-system.

Keep in mind that when selecting any of the above brands and its models, to select EnergyStar gas appliances with the energy factor, EF, 0.82 or higher. For all the units which has a gas input over 200,000 BTU per hour, they are not EnergyStar rated, even having the EF over 0.82.

Reviews about popular manufacturers, models, different types of water heaters, common problems, troubleshooting and more you can find in hot water heaters reviews.

For more information about tankless technology and available brands look for the reviews about tankless water heaters where you will find more information about selecting the best product, details about all popular water heaters and tips on how to save on water heating using tank-less technology.

About the Author

Zeljko is mechanical engineer, specialized in HVAC and the owner of the website hot-water-heater-reviews.com. His goal is to build a website about water heating that will cover reviews, troubleshooting, connect people who need help and ones to help about hot water and water heating appliances.

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