We’ve evaluated tankless water heaters since 2017, spending over 50 hours researching the best manufacturers in the industry. As we created this guide, we looked at representative models from each of the 10 best brands we found. Of these models, we chose ones that are best for various uses such as whole-home, single-sink and single-bathroom water heating.
Bosch WH27 Tronic Whole House
Ideal for replacing your electric storage tank water heater, the Bosch WH27 electric whole house tankless water heater is compact and powerful and can installed virtually anywhere inside the home. Advantages include endless hot water, reduced electricity costs and substantial space savings. Designed to replace a 40 Gal. electric tank, the Bosch WH27 electric tankless water heater is built to last with solid copper heat exchangers, and can help provide homeowners with a lower energy bill.
Bosch Electric Tankless Water Heater
Ideal for replacing your electric storage tank water heater in some applications, or supplementing a water heating system, the Bosch WH17 electric tankless water heater is compact and powerful and can installed virtually anywhere inside the home. Advantages include endless hot water, reduced electricity costs and substantial space savings.
The Bosch WH17 electric tankless water… heater is built to last with solid copper heat exchangers, and can help provide homeowners with a lower energy bill.
Takagi T-H3-DV-N Condensing High Efficiency
There are certain things you expect with a tankless water heater: endless hot water, compact sizing, and on-demand usage are just three popular options. How come so many models struggle to meet these basics?
The Takagi T-H3-DV-N Condensing Indoor Tankless Water… Heater doesn’t struggle at all. Not only will this appliance help you to save space and conserve energy, but it will give you all the hot water you need – even if you have a large family to support.
This high-efficiency natural gas tankless water heater meets current rules that are in place for ultra-low NOx emissions established in 2012 by SCAQMD rules. It is one of the few tankless heaters that really can provide a whole-home solution for multiple people.
Rinnai RL94eN Natural Gas Tankless Water Heater
If you are in need of a gas fired high capacity tankless water heater with Gallons per Minute as high as 9.4 as Rinnai RL94eN Natural Gas Tankless Water Heater is a very smart choice.
It bypasses the wait of hot water… in beginning by smart technology of re-circulation pump. Rinnai has termed it as luxury series tankless units for a reason. It has dual heat exchangers to provide higher heat at low time. This gas water heater is suitable for outdoor installation. It is 83% energy efficient and consumes only 9,900 – 199,000 BTU of gas.
It is a very sagacious choice for those who want a nifty tankless water heater that won’t bore them with a wait of hot water in the beginning. It has a Built-in circulation pump. This pump is an integrated system with a thermal bypass technology.
Eemax EX190TC 3-Gallon Series Two Whole House
One major feature that consumers are looking out of a tankless water heater model is its energy efficiency. The model is 99% energy efficient and is known to use energy at a very reasonable rate. The growing problem in any household is energy consumption and the kind of impact it has on the energy bill. The Eemax EX190TC 3-Gallon Series Two Whole House Electric Tankless Water Heater comes across as a major relief to those who have been using conventional tankless water heater as it consumes large amount of energy to function properly. The flow switch of the tankless water heater cuts energy costs to a considerable extent.
Installation is the most important aspect… when it comes to tankless water heaters as it can maximize or minimize the functionalities of a heater to a considerable extent. It is necessary for the water heater to be installed in a proper manner in order to get the best out of it. When it comes to Eemax EX190TC 3-Gallon Series Two Whole House Electric Tankless Water Heater installation has never been a problem. It is quite easy to install the tankless water heater and there are no complicated procedures associated with it. There is no need for T & P valve as in the case of other installations and it has 3/4″ Male NPT connections on bottom.
The tankless water heater supplies hot water on a continuous basis instantly. The on demand hot water supply never runs out and the temperature rise at 1.5 GPM which is equal to 87 degree. With 0.7 GPM turn on and 2 GPM flow rate, the tankless water heater is one of the best available in the market. The heater weighs 8 pounds and has the dimension 10 x 3 x 10.5 inches. The flow rate is 3 GPM and the design is contemporary. It comes with a limited warranty period, 5 years for leaks and 1 year for parts. It is perfect for single shower homes and condos.
AQUAH INDOOR WHOLE HOUSE LIQUID PROPANE
AQUAH NG (Natural Gas) tankless water Heater, 4.23 gal (16 L)/min or 254 gal/hr, automatic electrical pulse ignition with no standing pilot, no electric Hookup necessary, operated by 2 D batteries or by 110 V AC as alternative, free AC Adapter, IC water control device, thermal efficiency >=85%, 32,000 Watt / 109,260 Btu/h thermal input, 45* temperature rise at 4.23 gpm flow rate, 25 to 110 water pressure for operation, 2000 Pa (0.29psi) gas pressure, 1/2″ water inlet/Outlet, 1/2″ gas inlet, Winter/Summer control; Min/Max Water/Gas flow adjustment, dimensions: 27″ H x 16 1/2″ W x 8″ D, net weight: 30.20 lb, requires 5″ double wall type B vent pipes (not included).
Rheem RTG-95XLP 9.5 GPM Outdoor Tankless Propane Water Heater
If you have a large 3-4 bathroom home with 4-5 or more occupants, and you’re already using propane as a fuel source, the RTG-95XLP might be the best tankless water heater for you. It does have all of the features of the RTG-84XLP, with more power and higher GPM flow.
9.5 gallons per minute is one of the highest GPMs… in our top listing of tankless water heaters. As expected, it will cause this propane tankless water heater to fall in the mid-high range of pricing. However, it is currently priced the same as the RTG-84XLP, so for the same amount you get a higher-performing heater—take advantage of this great deal before the price changes!
The RTG-95XLP has a BTU range from 11,000 to 199,900 BTU. For this outdoor unit, the default output temperature is 120 degrees F, but it can be raised up to 140 degrees F with a simple change on the remote control (included with the unit so you don’t have to trudge outside to adjust the temperature). Most competitor units only go up to 120 degrees F, so if you prefer hotter water for your laundry and dishwashing, this unit will perform.
Bosch AE115 PowerStar 2.6 GPM Indoor Whole House
Bosch Powerstar whole house water heaters are instantaneous electric units designed to deliver hot water to any of the plumbing units in residential application, providing over 90% thermal efficiency. They are designed to replace a 40-gallon tank type electric unit and provide an endless hot water with much better efficiency.
These whole house electric heaters… heat potable water for domestic purposes, with the recommended incoming pressure from 1 bar to 10 bar (15 psi – 150 psi).
If you decide to go with Powerstar water heaters AE115 and AE125 whole house models instead point-of-use appliances you will have a 10-year worry-free warranty on heat exchanger, vs. 5 years offered for AE3.4-AE12 models.