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20 Best Tankless Water Heater For Large Family (2023 Updated)

A tankless water heater is a water heater that doesn’t have a holding tank. Instead, it heats water on demand, which means that it only heats water when you need it. This makes tankless water heaters more efficient than traditional water heaters because they don’t have to waste energy keeping a holding tank of water hot.

Tankless water heaters are a great option for large families because they can provide a continuous supply of hot water.

20 Best Tankless Water Heater For Large Family

Product Image Product Name Features Price

Rinnai V94IN Internal Natural GAS Tankless Water Heater

  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks

Rinnai V75IN 7.5 GPM Indoor Natural GAS Tankless Water Heater

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended

Black & Decker 24 KW 4.68 GPM Electric Tankless Water Heater

  • 24 Kw

Rinnai RUR199iN 199,000 BTU Indoor Natural GAS Tankless Water Heater

  • Professional installation required; call 84-GO-Rinnai for assistance.
  • ENERGY STAR Qualified with Uniform Energy Factor of .93.

Rinnai RU180iN 180,000 BTU Indoor Natural GAS Tankless Water Heater

  • 130,000 Btu

Rinnai RL75eN Outdoor Natural GAS Tankless Water Heater

  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.

Marey Electric Tankless Instant Water Heater – 18 KW – 5 GPM – 220 V

  • 18kw

Rinnai RL94iP Indoor Tankless Water Heater Propane

  • ENERGY STAR qualified.
  • Energy factor of.
  • Built-in Rinnai Circ-LogicTM recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort.

Eccotemp i12-NG Indoor Natural GAS Tankless Water Heater

  • Sleek, modern design with black tempered glass front panel featuring an easy to use LED display controls
  • Features fully automatic temperature controls with an energy saving mode and child lock technology

Rheem RTGH-RH11DVLN Prestige Series Natural GAS Condensing Tankless Water Heater with Built-in Recirculation

  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 199, 000 BTU (gas consumed per hour)
  • Instant hot water

Rinnai V75eP 7.5 GPM Outdoor Propane Tankless Water Heater

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended

Ecosmart 27 Tankless Electric Water Heater

  • 27kw

Rheem RTG-70XLN-1 Outdoor Natural GAS Tankless Water Heater

  • Outdoor 9.5 Gpm / 7.0 Gpm

Rinnai RUCS75iN 7.5 GPM Indoor Natural GAS Tankless Water Heater

  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks

Rinnai RL75iN Natural GAS Tankless Water Heater

  • Ideal for two- to three-bathroom homes, the RL75i.
  • RL75iN delivers up to 7.5 gallons of hot water per minute (GPM), while saving energy and money. Mount your compact RL75i.

Rinnai RL94eN Outdoor Natural GAS Tankless Water Heater

  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.

Bosch WH17 Tankless Water Heater – Electric

  • CONVENIENT TANKLESS HOT WATER HEATER: 17.3 kW tankless whole house electric water heater provides hot water when needed, for as long as needed

Rinnai Luxury 766156006333 Whole House Tankless Water Heater – Natural Gas – 180,000 BTU

  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.
Rinnai V94IN Internal Natural GAS Tankless Water Heater
  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks
Rinnai V75IN 7.5 GPM Indoor Natural GAS Tankless Water Heater
  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Black & Decker 24 KW 4.68 GPM Electric Tankless Water Heater
  • 24 Kw
Rinnai RUR199iN 199,000 BTU Indoor Natural GAS Tankless Water Heater
  • Professional installation required; call 84-GO-Rinnai for assistance.
  • ENERGY STAR Qualified with Uniform Energy Factor of .93.
Rinnai RU180iN 180,000 BTU Indoor Natural GAS Tankless Water Heater
  • 130,000 Btu
Rinnai RL75eN Outdoor Natural GAS Tankless Water Heater
  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.
Marey Electric Tankless Instant Water Heater – 18 KW – 5 GPM – 220 V
  • 18kw
Rinnai RL94iP Indoor Tankless Water Heater Propane
  • ENERGY STAR qualified.
  • Energy factor of.
  • Built-in Rinnai Circ-LogicTM recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort.
Eccotemp i12-NG Indoor Natural GAS Tankless Water Heater
  • Sleek, modern design with black tempered glass front panel featuring an easy to use LED display controls
  • Features fully automatic temperature controls with an energy saving mode and child lock technology
Rheem RTGH-RH11DVLN Prestige Series Natural GAS Condensing Tankless Water Heater with Built-in Recirculation
  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 199, 000 BTU (gas consumed per hour)
  • Instant hot water
Rinnai V75eP 7.5 GPM Outdoor Propane Tankless Water Heater
  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Ecosmart 27 Tankless Electric Water Heater
  • 27kw
Rheem RTG-70XLN-1 Outdoor Natural GAS Tankless Water Heater
  • Outdoor 9.5 Gpm / 7.0 Gpm
Rinnai RUCS75iN 7.5 GPM Indoor Natural GAS Tankless Water Heater
  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks
Rinnai RL75iN Natural GAS Tankless Water Heater
  • Ideal for two- to three-bathroom homes, the RL75i.
  • RL75iN delivers up to 7.5 gallons of hot water per minute (GPM), while saving energy and money. Mount your compact RL75i.
Rinnai RL94eN Outdoor Natural GAS Tankless Water Heater
  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.
Bosch WH17 Tankless Water Heater – Electric
  • CONVENIENT TANKLESS HOT WATER HEATER: 17.3 kW tankless whole house electric water heater provides hot water when needed, for as long as needed
Rinnai Luxury 766156006333 Whole House Tankless Water Heater – Natural Gas – 180,000 BTU
  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.

1. Rinnai V94IN Internal Natural GAS Tankless Water Heater

Rinnai V94IN Internal Natural GAS Tankless Water Heater

  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks

Check Latest Price

Sold By Price
Amazon.com
eBay
Lowe’s
Home Depot

Product Details

Specifications

Details
Weight 57.45 oz

Reviews From Real Customers

Steve C
Jomama

2. Rinnai V75IN 7.5 GPM Indoor Natural GAS Tankless Water Heater

Rinnai V75IN 7.5 GPM Indoor Natural GAS Tankless Water Heater

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance up to 7.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit

Check Latest Price

Sold By Price
Amazon.com
eBay
Home Depot
Lowe’s

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Reviews From Real Customers

paris2932
Boz
Atlanta Homeowner

3. Black & Decker 24 KW 4.68 GPM Electric Tankless Water Heater

Black & Decker 24 KW 4.68 GPM Electric Tankless Water Heater

  • 24 Kw

Check Latest Price

Sold By Price
Amazon.com – Seller
Walmart
Lowe’s
Tractor Supply Company

Product Details

Specifications

Details
Weight (lbs.) 15
Amps Required for Unit Only (Amps) 100
Bluetooth Compatibility No
Smart Compatible No
Major Appliances Supplied Simultaneously 4

Reviews From Real Customers

jack d
rednrodeo

4. Rinnai RUR199iN 199,000 BTU Indoor Natural GAS Tankless Water Heater

Rinnai RUR199iN 199,000 BTU Indoor Natural GAS Tankless Water Heater

  • Professional installation required; call 84-GO-Rinnai for assistance.
  • ENERGY STAR Qualified with Uniform Energy Factor of .93.
  • Save time with hot water whenever and wherever you need it, any size home, even for simultaneous uses at multiple fixtures.
  • Save energy and reduce utility costs by operating only when hot water is needed.

Check Latest Price

Sold By Price
Amazon.com – Seller
ACWholesalers.com
Supply Online
WWCSupply.com

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Reviews From Real Customers

Bmac
Notsohot1769
Bmac9572

5. Rinnai RU180iN 180,000 BTU Indoor Natural GAS Tankless Water Heater

Rinnai RU180iN 180,000 BTU Indoor Natural GAS Tankless Water Heater

  • 130,000 Btu

Check Latest Price

Sold By Price
Amazon.com – Seller
Home Depot
Lowe’s
Vevano

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Reviews From Real Customers

ZoidinNH9054
juicex2438

6. Rinnai RL75eN Outdoor Natural GAS Tankless Water Heater

Rinnai RL75eN Outdoor Natural GAS Tankless Water Heater

  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.
  • Energy Star Qualified.

Check Latest Price

Sold By Price
Amazon.com
Home Depot
Lowe’s
Supply Online

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Reviews From Real Customers

tim9969
gar8042
doc7808

7. Marey Electric Tankless Instant Water Heater – 18 KW – 5 GPM – 220 V

Marey Electric Tankless Instant Water Heater - 18 KW - 5 GPM - 220 V

  • 18kw

Check Latest Price

Sold By Price
Amazon.com
Walmart
Home Depot
Wayfair

Product Details

Specifications

Details
No need for pre-heating instant tankless water heater on demand heating.
Fuel Type Electric
Tankless Yes
Gallons Per Minute 5 Gallons
Installation Indoor

Reviews From Real Customers

Andy A.
My T.

8. Rinnai RL94iP Indoor Tankless Water Heater Propane

Rinnai RL94iP Indoor Tankless Water Heater Propane

  • ENERGY STAR qualified.
  • Energy factor of.
  • Built-in Rinnai Circ-LogicTM recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort.

Check Latest Price

Sold By Price
Amazon.com – Seller
Home Depot
Lowe’s
Ferguson

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Reviews From Real Customers

alf24328
birdoger
ter28222

9. Eccotemp i12-NG Indoor Natural GAS Tankless Water Heater

Eccotemp i12-NG Indoor Natural GAS Tankless Water Heater

  • Sleek, modern design with black tempered glass front panel featuring an easy to use LED display controls
  • Features fully automatic temperature controls with an energy saving mode and child lock technology
  • Uses standard 1/2″ NPT water fittings and comes with horizontal venting allowing for a convenient and quick installation

Check Latest Price

Sold By Price
Amazon.com – Seller
eBay
Walmart
Sam’s Club

Product Details

Specifications

Details
Fuel Type Natural gas

Reviews From Real Customers

baye_74
ngtowl
Gary B.

10. Rheem RTGH-RH11DVLN Prestige Series Natural GAS Condensing Tankless Water Heater with Built-in Recirculation

Rheem RTGH-RH11DVLN Prestige Series Natural GAS Condensing Tankless Water Heater with Built-in Recirculation

  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 199, 000 BTU (gas consumed per hour)
  • Instant hot water
  • For use indoor only

Check Latest Price

Sold By Price
Amazon.com
SupplyHouse.com
Wholesale Water Heaters & More
TanklessKing

Product Details

Specifications

Details
Fuel Type Natural Gas
Water Connection 3/4″
Voltage 120V
Amperage 2A
Activation GPM 0.5

Reviews From Real Customers

AquatechP
Cathie and Michael D

11. Rinnai V75eP 7.5 GPM Outdoor Propane Tankless Water Heater

Rinnai V75eP 7.5 GPM Outdoor Propane Tankless Water Heater

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance up to 7.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit

Check Latest Price

Sold By Price
Amazon.com
Supply Online
WWCSupply.com
HomePlumbing.com

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Reviews From Real Customers

Disappointed2910
CustomBuilder0326
GaryNC8728

12. Ecosmart 27 Tankless Electric Water Heater

Ecosmart 27 Tankless Electric Water Heater

  • 27kw

Check Latest Price

Sold By Price
Amazon.com
eBay
Walmart
Ace Hardware

Product Details

Specifications

Details
Assembled Depth (in) 3.75 in
Assembled Height (in) 18 in
Assembled Width (in) 17 in
Assembled Weight (lbs) 13.75 lbs
Item is Shipped at this Packaging Level Y

Reviews From Real Customers

Juan Carlos Garcia
Mario Consuegra
TheBoop

13. Takagi Indoor Tankless Water Heater Natural GAS T-H3-DV-N

Takagi Indoor Tankless Water Heater Natural GAS T-H3-DV-N

Check Latest Price

Sold By Price
Amazon.com – Seller
SupplyHouse.com
Faucet Depot
ACWholesalers.com

Product Details

Specifications

Details
Heat Exchanger Material Copper/Stainless
Fuel Type Natural Gas
Combustion Type Condensing
Vent Type Direct Vent
Venting Category IV

Reviews From Real Customers

grahamk
Joe E
Arsen A.

14. Rheem RTG-70XLN-1 Outdoor Natural GAS Tankless Water Heater

Rheem RTG-70XLN-1 Outdoor Natural GAS Tankless Water Heater

  • Outdoor 9.5 Gpm / 7.0 Gpm

Check Latest Price

Sold By Price
Amazon
Rheem Tankless Heaters
Wayfair
Big Frog Supply

Product Details

Specifications

Details
Fuel Type Natural Gas
Water Connection 3/4″
Voltage 120V
Amperage 2A
Activation GPM 0.4

Reviews From Real Customers

Joan and Tom E
Carl S
Richard K

15. Rinnai RUCS75iN 7.5 GPM Indoor Natural GAS Tankless Water Heater

Rinnai RUCS75iN 7.5 GPM Indoor Natural GAS Tankless Water Heater

  • Compact design: saves space
  • Never run out of hot water
  • Up to twice the lifespan of most tanks

Check Latest Price

Sold By Price
Amazon
eBay
Ferguson
ACWholesalers.com

Product Details

Specifications

Details
Weight 57.3 oz

Reviews From Real Customers

Nokieness3444
LaceyJub8532926
Barbee7359

16. Rinnai RL75iN Natural GAS Tankless Water Heater

Rinnai RL75iN Natural GAS Tankless Water Heater

  • Ideal for two- to three-bathroom homes, the RL75i.
  • RL75iN delivers up to 7.5 gallons of hot water per minute (GPM), while saving energy and money. Mount your compact RL75i.
  • RL75iN in virtually any room, and vent directly to the outside with a wall or roof penetration.

Check Latest Price

Sold By Price
Amazon
eBay
Big Frog Supply
Morealis

Product Details

Specifications

Details
Weight 65.9 oz

Reviews From Real Customers

studynsleep
Curtis Mewborn
rmo18576

17. Rinnai RL94eN Outdoor Natural GAS Tankless Water Heater

Rinnai RL94eN Outdoor Natural GAS Tankless Water Heater

  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.
  • Energy Star Qualified.

Check Latest Price

Sold By Price
Amazon
eBay
Home Depot
Lowe’s

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Reviews From Real Customers

les22358
eri21552
brobey8920

18. Outdoor Condensing Tankless Water Heater – NG

Outdoor Condensing Tankless Water Heater - NG

Check Latest Price

Sold By Price
Amazon
MyTanklessWaterHeaterStore

Product Details

Reviews From Real Customers

Edgar I
Bob E
Gregory J.

19. Bosch WH17 Tankless Water Heater – Electric

Bosch WH17 Tankless Water Heater - Electric

  • CONVENIENT TANKLESS HOT WATER HEATER: 17.3 kW tankless whole house electric water heater provides hot water when needed, for as long as needed
  • EASY INSTALLATION: Can be installed virtually anywhere for commercial or residential applications
  • CONSISTENT TEMPERATURE: Polymer encased elements & built-in flow sensor ensures constant output temperature
  • STABILITY & CONTROL: External temperature control knob & superior temperature stability and control
  • GREAT EFFICIENCY: 97% thermal efficiency with minimal stand-by loss

Check Latest Price

Sold By Price
Amazon
eBay
Home Depot
AF Supply

Product Details

Specifications

Details
Power Source Electric
Product Type Tankless Water Heater
Commercial or Residential Residential or Commercial
Amperage 80 are
Assembled Width 8-1/2 in.

Reviews From Real Customers

Friendly Lance

20. Rinnai Luxury 766156006333 Whole House Tankless Water Heater – Natural Gas – 180,000 BTU

Rinnai Luxury 766156006333 Whole House Tankless Water Heater - Natural Gas - 180,000 BTU

  • Temperature Controlled, Continuous Flow, Gas Hot Water System.
  • Certified for installation in Manufactued (Mobile) homes.
  • Forced combustion / Direct vent.
  • Energy Star Qualified.

Check Latest Price

Sold By Price
Lowe’s
Home Depot
SupplyHouse.com
Vevano

Product Details

Specifications

Details
Fuel Type Liquid Propane (LP)
Fuel Type Natural Gas (NG)

Reviews From Real Customers

NanuNanu
mtsi1

Conclusion

After much research and deliberation, we have come to the conclusion that a tankless water heater is the best option for a large family. Tankless water heaters are more efficient than traditional water heaters, and they will save you money in the long run.

They also take up less space, which is a bonus if you have a small home.

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