Best Whole House Water Heater in 2022

Your home is your castle, and you should have complete confidence in your household water supply. That’s why a whole-house water heater is such an important investment. Not only does it provide hot water for your convenience and comfort, but it also gives you peace of mind, knowing that your home and family have a dependable source of hot water.

When it comes to choosing a whole-house water heater, there are many factors to consider. But with so many options on the market, how do you choose the best one for your home?

Here are a few things to keep in mind as you shop for a whole-house water heater:

Fuel type: Gas, electric, or propane?

Tank size: Will a small, medium, or large tank best suit your needs?

Recovery rate: How quickly do you need your hot water?

Design: Are you looking for a standard or tankless water heater?

Energy efficiency: What’s the initial cost vs. long-term savings?

Now that you know what to look for, here are our picks for the best whole-house water heaters on the market:

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Things to Consider:

There are a few things you should consider before buying the best whole house water heater. The size and capacity of the unit, the fuel type, and the climate in which you live are all important factors to keep in mind. You’ll also want to consider the warranty and service agreement offered by the manufacturer.

How We Pick & Test:

There are a few factors to consider when purchasing a whole house water heater. The size of the unit, the type of fuel it uses, and the warranty are important things to think about. We compiled a list of the best whole house water heaters after considering all of these factors. We then put the units through a series of tests to see which one performed the best. The unit that excelled in all of our tests is the Rheem Performance Plus 50 gal. Tall 9 Year 40,000 BTU High Efficiency Natural Gas Water Heater. This unit is the best whole house water heater for most people because it is a great size, uses natural gas, and has a long warranty.

Top 10 Best Whole House Water Heater

# Preview Product
1 3M Aqua-Pure Whole House Scale Inhibition Inline Water System AP430SS, Helps Prevent Scale Build Up On Hot Water Heaters and Boilers 3M Aqua-Pure Whole House Scale Inhibition Inline Water System AP430SS, Helps Prevent Scale Build Up...
2 Waterdrop AP431 Whole House AP430SS Scale Inhibition Inline Water System, Scale Inhibitor, Prevent Scale Build Up On Hot Water Heaters Waterdrop AP431 Whole House AP430SS Scale Inhibition Inline Water System, Scale Inhibitor, Prevent...
3 Stiebel Eltron Tankless Heater – Tempra 36 Plus – Electric, On Demand Hot Water, Eco, White Stiebel Eltron Tankless Heater – Tempra 36 Plus – Electric, On Demand Hot Water, Eco, White
4 3M Aqua-Pure Whole House Scale Inhibition Inline Replacement Water Cartridge AP431, For Aqua-Pure System AP430SS, Helps Prevent Scale Buildup On Hot Water Heaters, Boilers, Plumbing Pipes and Fixtures 3M Aqua-Pure Whole House Scale Inhibition Inline Replacement Water Cartridge AP431, For Aqua-Pure...
5 Tankless Water Heater Electric 27kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater, Digital Temperature Display for Residential Whole House Shower, 114A GRAY Tankless Water Heater Electric 27kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater,...
6 MAREY 4.2 GPM, 100,000 BTUs, Whole House solution, Digital Display, Outdoor Propane Gas Tankless Water Heater, Silver MAREY 4.2 GPM, 100,000 BTUs, Whole House solution, Digital Display, Outdoor Propane Gas Tankless...
7 Titan Tankless N-210 Whole House Water Heater System Titan Tankless N-210 Whole House Water Heater System
8 iFilters Whole House Water Filter, 2 Stage, Removes Sediment, CTO, and More, Minimal Pressure Drop, City and Well Water iFilters Whole House Water Filter, 2 Stage, Removes Sediment, CTO, and More, Minimal Pressure Drop,...
9 Tankless Water Heater Natural Gas, Camplux Instant Hot Water Heater, 3.18 GPM Natural Gas Tankless Water Heater, Whole House Gas Water Heater, Indoor, Black Tankless Water Heater Natural Gas, Camplux Instant Hot Water Heater, 3.18 GPM Natural Gas Tankless...
10 Electric Tankless Hot Water Heater, 18KW 240V On Demand Instant Hot Water Heater with Digital Display Touch Panel, ℉ & ℃ Conversion, Easy Installation for Bathroom Shower Whole House, ETL Certified Electric Tankless Hot Water Heater, 18KW 240V On Demand Instant Hot Water Heater with Digital...
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Details of Best Whole House Water Heater

SaleBestseller No. 1
3M Aqua-Pure Whole House Scale Inhibition Inline Water System AP430SS, Helps Prevent Scale Build Up On Hot Water Heaters and Boilers
  • Helps Protect Hot Water Heaters: Polyphosphates, Included In This Product, Help To Inhibit Scale Build Up In Hot Water Heaters (Both Standard (Gas Or Electric) And Tank Less Styles) And Boilers; Helps Extend The Life Of Hot Water Heaters And Hot Water Using Appliances, Pipes, And Downstream Plumbing Fixtures Such As Faucets And Shower Heads
  • Maintains Efficiency: By Inhibiting Scale Build Up On Heating Elements, Helps Maintain Water Heater Efficiency
  • Easy To Replace: Easy Change Out Of The 3M Aqua-Pure Ap431 Replacement Water Cartridge Makes System Maintenance Easier
  • High Flow Rates: 3/4 Inch Npt Inlet/Outlet Connections For Easy Installation And High Flow Rates (Rated For Up To 10 Gpm); System To Be Installed On Cold Water Line Feeding The Water Heater
Bestseller No. 2
Waterdrop AP431 Whole House AP430SS Scale Inhibition Inline Water System, Scale Inhibitor, Prevent Scale Build Up On Hot Water Heaters
  • 【Efficient Scale Inhibition】Food-grade polyphosphates, included in the Waterdrop scale inhibitor, can fundamentally inhibit scale formation to provide healthy water for you. This is a highlight different from conventional filters.
  • 【Energy Conservation】This scale inhibitor can protect your water heater, dishwasher, boilers, downstream plumbing fixtures like faucets and shower heads from scale buildup while improving the efficiency of electrical appliances, and extending their life.
  • 【High Flow Rate】3/4 " NPT inlet/outlet ensures high flow rate of 10 GPM to keep stable water pressure. This scale inhibitor system can be installed on any pipeline adaptive to its interface.
  • 【Premium Material】This scale inhibitor system is equipped with a durable and anti-rusting 304 stainless steel adapter. Besides, its food-grade and BPA-free materials safeguard healthy water. Please note - this system is NOT a regular pre-filter. So it doesn't force all the water through the filter like a normal filter. Only a portion of the source water will flow through the filter to absorb food-grade polyphosphates for better filtration.
  • 【Longer Lifespan】Enjoy purified water with this inline scale inhibition system. Every water cartridge can last for 6 months for regular use, which may vary based on local water quality. Please maintain this scale inhibitor system in an upright position during installation to get better inhibition effect. Be sure to install this system on a cold water supply line that supplies water to a water heater.
Bestseller No. 3
Stiebel Eltron Tankless Heater – Tempra 36 Plus – Electric, On Demand Hot Water, Eco, White
  • On-demand, continuous and unlimited supply of hot water
  • Sleek design saves space and no venting required
  • Electronic switch activated for virtually silent operation. Phase- single 60 Hz. Voltage- 208 V. Wattage- 27 kW
  • Copper sheathed heating element housed in copper cylinder
  • 7 Years leakage and 3 years parts complete warranty
Bestseller No. 4
3M Aqua-Pure Whole House Scale Inhibition Inline Replacement Water Cartridge AP431, For Aqua-Pure System AP430SS, Helps Prevent Scale Buildup On Hot Water Heaters, Boilers, Plumbing Pipes and Fixtures
  • DESIGNED FOR USE WITH 3M Aqua-Pure Whole House Scale Inhibition Inline Water System AP430SS
  • HELPS PROTECT HOT WATER HEATERS: Polyphosphates, included in this product, help to inhibit scale buildup in hot water heaters (both standard (gas or electric) and tank-less styles) and boilers. Helps extend the life of hot water heaters and hot water using appliances, pipes, and downstream plumbing fixtures such as faucets and shower heads.
  • MAINTAINS EFFICIENCY: By inhibiting scale buildup on heat elements, helps maintain water heater efficiency.
  • EASY TO REPLACE: Easy change-out makes system maintenance easy.
  • HIGH FLOW RATES: Rated for up to 10 gallons per minute (gpm).
Bestseller No. 5
Tankless Water Heater Electric 27kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater, Digital Temperature Display for Residential Whole House Shower, 114A GRAY
  • [Instant Unlimited Hot Water] - REQUIRE 3 SET x Double-pole 40AMP Breakers to Achieve 240V for this On demand tankless electric water heater, providing hot water in 3 seconds when you need it and as long as you need, eliminating wait time, never run out of hot water again and No More cold shower. Flow Rate 5.27GPM @35°F Rise
  • [Self-modulating Power] - Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99.8% efficient, saving up to 60% on water heating cost comparing to traditional tank water heater. Wall mounted compact size with no water tank, convenient for any spaces, saving floor space and fitting into tight spaces.
  • [Stable Water Temperature] - Auto adjusting energy consumption basing on income water temperature and flow, ensuring maximum efficiency, continuous stable temperature and optimal power usage. Digital temperature display allowing adjustment in 1° increment from 80°F to 140°F. Heating element separated from water tube significantly reducing scale, corrosion and mineral buildup on the element, achieving better performance and low maintenance.
  • [Easy Installation & Safety Protection] - ETL certified with overheating protection, auto stop heating when detecting no water, quality workmanship for leakage protection
  • NOTE - Make sure this water heater is the correct size for your hot water need: 27kW at 240V draw max 114Amp; Required breaker 3 x Double-POLE 40AMP; Wire gauge 3 x 8AWG; Unit size 17.12" x 13.12" x 3.12"; Water connection 3/4" NPT. 2-year limite warranty and 24/7 customer support services.
Bestseller No. 6
MAREY 4.2 GPM, 100,000 BTUs, Whole House solution, Digital Display, Outdoor Propane Gas Tankless Water Heater, Silver
  • Maximum of 4.2 Gal. per minute for a perfect outdoor shower at 115°F output water temperature.
  • Rated at maximum output 100,000 BTUs for endless hot water
  • No electricity needed: unit ignites with 2 D cell batteries. Perfect for off the grid areas, campsites, cabins or any other location where electricity is not available.
  • Unit comes with a digital display making it easy to adjust water and gas flow to your desired output temperature
  • CSA Certified gas regulator and hose and portable outdoor shower included
Bestseller No. 7
Titan Tankless N-210 Whole House Water Heater System
  • Provides endless hot water for your entire hoe and saves up to 50% on your hot water bill!
Bestseller No. 8
iFilters Whole House Water Filter, 2 Stage, Removes Sediment, CTO, and More, Minimal Pressure Drop, City and Well Water
  • Filters and reduces sediment, dirt, sand, silt, rust, scale particles, Chlorine taste & odor, VOC's
  • Use for whole house, inline, or under sink
  • Extends life of washing machines, water heaters and other household appliances
  • 3/4" NPT Port with Pressure Relief button on cap for easy filter change outs.
  • Designed in California and built from Certified Approved Components. Replacement Filters: SG-GAC-SET. Search ASIN: B09L3TM1R4
Bestseller No. 9
Tankless Water Heater Natural Gas, Camplux Instant Hot Water Heater, 3.18 GPM Natural Gas Tankless Water Heater, Whole House Gas Water Heater, Indoor, Black
  • 3.18 GPM Instant Constant Water Heater -Camplux 3.18 GPM tankless water heater natural gas delivers 3.18 gallons per minute of on-demand endless hot water ensures constant comfortable instant hot water for 2-3 persons whole house. 3.18-GPM heater is activated by water flow rather than water pressure; Minimum activation water capacity rate: 0.65 GPM-4.8 GPM; Maximum input rating: 82,000 BTUs; Water connection location/size: Bottom/0.5-inch NPT.
  • Convenient, Easy Installation -The tankless water heater uses standard 1/2" BSP water fitting and gas inlet. The water heater comes with1/2 " BSP female to 1/2" NPT male gas connector adapter then you want hook this water heater to natural gas pipe directly.It also comes with 2.3" horizontal vent pipe,ensures efficient power ventilation. You can take Camplux customized wall thimble-WT236 for perfect indoor use.
  • Modern Design,Easy Operation -Trendy and modern design with unique black glassy front panel,easy to control the water temperature with LED touchscreen (Fahrenheit and Celsius switch optional).The compact size instant water heater saves more space than traditional tanks.
  • Outstanding Features- The Camplux tankless hot water heater comes with oxgen-free copper heat exchanger and v-type stainless steel burner,high heating efficiency up to 89.98 %; 90°wind isolation design, this tankless natural gas water heater can anti backflow wind in high floors, the S/S 2.36 ” vent pipe exhaust harmful gases quickly.
  • 6-In-1 Protection Ensure Your Safety- Dry combustion,flame failure device, anti-freezing protection, over heating protection to ensure your safety. Fully automatic temperature controls with an energy saving mode and child lock technology.
Bestseller No. 10
Electric Tankless Hot Water Heater, 18KW 240V On Demand Instant Hot Water Heater with Digital Display Touch Panel, ℉ & ℃ Conversion, Easy Installation for Bathroom Shower Whole House, ETL Certified
  • ♡【18KW INSTANT WATER HEATER】- The electric Tankless Water Heater applied with powerful 18kW heating system supplies sufficient instant and endless hot water in seconds, no waiting for preheating nor terrible temp fluctuation during shower. Perfect companion for single shower, sink faucets, dishwasher, washing machine or whole house.
  • ♡【SAVING SPACE & ENERGY】- This instant hot water heater with compact size perfect and quite space-saving for kitchen, school, hospital, and a hair salon. Tankless, instantaneous heating for on demand hot water, No pre-heating. No stand-by heating loss energy-saving. [WARM TIPS]: Please verify it is the right size for you: 18kW at 240V(only); dimensions 10.24" (W) x 15.16" (H) x 3.7" (D), Plumbing connections :3/4" NPT.
  • ♡【℉ & ℃ CONVERTIBLE TECH】- More considerate is, we consider the users' habit, we upgraded the water heater and equipped with degree conversion button. Through touch screen operation, you can easily convert Fahrenheit and Celsius. It is convenient for you to choose and check the temperature according to your habits.
  • ♡【EASY TO INSTALL & OPERATE】- The 18KW electric tankless water heater comes with digital display & touch control panel so temp setting is a easy job. Best of all, useful information on the screen helps you get full understanding of the working status, you no longer need to perform difficult operations without instructions.
  • ♡【MULTIPLE PROTECTION】- Your safety is the top priority. Multiple protection to ensure your safety. Overtemperature protection: when the outlet water temp. reaches over 153F/67C, the electricity will be cut off to avoid getting scalded and the screen displays E1. the appliance will start to work automatically while temp. drop to the set temperature. ETL listed for safety.

Benefits of Best Whole House Water Heater:

There are many benefits and features of the best whole house water heater. One benefit is that it can provide hot water for your entire home. This means that you don’t have to rely on your water heater to provide hot water for just one room or one area of your home. Another benefit is that the best whole house water heater is usually more energy efficient than a traditional water heater. This means that it can save you money on your energy bills. Finally, the best whole house water heater is usually more reliable and lasts longer than a traditional water heater.

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Size:

Water heaters come in many different shapes and sizes, but the size that is best for a whole house is dependent on many factors. The first factor to consider is the number of bathrooms in the house, as this will determine the amount of hot water that is needed. Other factors to consider include the climate, the size of the home, and the typically water usage. Once these factors are considered, the best size for a whole house water heater can be determined.

Design:

There are many factors to consider when designing a whole house water heater. The first is the size of the unit. It is important to choose a unit that is large enough to meet the demand of the entire household. The next thing to consider is the fuel source. There are many options available, including natural gas, propane, and electricity. The final thing to consider is the warranty. Most water heaters come with a limited warranty, so it is important to choose a unit that has a good warranty.

Ease of Use:

The best whole house water heater is very easy to use. All you need to do is connect it to your water line and it will automatically heat up your water. You can also adjust the temperature settings to make sure that your water is always at the perfect temperature.

Convenience:

The best whole house water heater is one that is both convenient and efficient. It is important to have a water heater that can provide hot water on demand, and one that is energy efficient. The best whole house water heater is one that can save you money on your energy bill, and one that is also convenient to use. There are many different types of water heaters on the market, and it is important to find one that is right for your home.

Durability:

Best whole house water heaters are built to last. They are made with high-quality materials and are designed to withstand the elements. Best whole house water heaters are also backed by a warranty, so you can be sure that your investment is protected.

Frequently Ask Questions:

Is higher BTU better for a water heater? The BTU (British Thermal Unit) is the unit of measure used to specify the amount of heat needed to raise one pound of water by one degree Fahrenheit. In terms of hot water heaters, the higher the BTU, the greater the heating efficiency.

Conclusion:

There is no definitive answer when it comes to the best whole house water heater. Depending on your needs and preferences, any of the options we’ve reviewed could be the best choice for you. In general, we recommend tankless water heaters as the best option for most people. They’re more energy-efficient and have a longer lifespan than traditional tank water heaters. However, tankless water heaters are more expensive to purchase and install. If you’re on a budget, a traditional tank water heater may be the better option for you.

Last update on 2022-10-02 / Affiliate links / Images from Amazon Product Advertising API.

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