• Tankless Water Heater expert reviews and recommendations for gas and electric Rheem, Ariston, Powerstar Stiebel Eltron and Bosch Tankless Water Heaters


Gas Tankless
Natural Gas (NG)
Propane (LP)
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Electric Tankless
PowerStar
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Gas Tankless

Gas Tankless Water Heaters

Natural Gas -
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2-3 Bathrooms
1-2 Bathrooms
1 Bathroom

Propane -
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2-3 Bathrooms
1-2 Bathrooms
1 Bathroom

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Bosch AquaStar 2700ES-NG  (Natural Gas)
Bosch AquaStar 2700ES-NG (Natural Gas)
The Bosch AquaStar 2700ES propane gas tankless water heater is innovation at its...
  • Max Flow Rate (45° rise): 7.2 GPM
  • # Bathrooms: 2-3
  • Energy Factor: 82 %

Qualifies for Tax Credit
Bosch AquaStar 2700ES-NG for High Elevations
Bosch AquaStar 2700ES-NG for High Elevations
This Bosch AquaStar 2700ES-NG is approved for installation from 4500'...
  • Max Flow Rate (45° rise): 7.2 GPM
  • # Bathrooms: 2-3
  • Energy Factor: 82 %

Qualifies for Tax Credit
Bosch AquaStar 1600H-NG (Natural Gas)
Bosch AquaStar 1600H-NG (Natural Gas)
Hydro-generated ignition system that requires no pilot, batteries or ...
  • Max Flow Rate (45° rise): 4.3 GPM
  • # Bathrooms: 1 Shower
  • Energy Factor: 80 %

Requires no electricity to operate
Bosch AquaStar 2700ES-LP (Propane)
Bosch AquaStar 2700ES-LP (Propane)
The Bosch AquaStar 2700ES propane gas tankless water heater is innovation at its...
  • Max Flow Rate (45° rise): 7.2 GPM
  • # Bathrooms: 2-3
  • Energy Factor: 82 %

Qualifies for Tax Credit
Bosch AquaStar 2700ES-LP for High Elevations
Bosch AquaStar 2700ES-LP for High Elevations
The Bosch AquaStar 2700ES propane gas tankless water heater is innovation at its...
  • Max Flow Rate (45° rise): 7.2 GPM
  • # Bathrooms: 2-3
  • Energy Factor: 82 %

Qualifies for Tax Credit
Bosch AquaStar 2400ES-LP (Propane)
Bosch AquaStar 2400ES-LP (Propane)
Model 2400ES whole house gas tankless water heater.
  • Max Flow Rate (45° rise): 6.4 GPM
  • # Bathrooms: 2
  • Energy Factor: 82 %

Qualifies for Tax Credit
Bosch AquaStar 2400ES-NG (Natural Gas)
Bosch AquaStar 2400ES-NG (Natural Gas)
Model 2400ES whole house gas tankless water heater.
  • Max Flow Rate (45° rise): 6.4 GPM
  • # Bathrooms: 2
  • Energy Factor: 82 %

Qualifies for Tax Credit
Bosch AquaStar 2400ES-NG for High Elevations
Bosch AquaStar 2400ES-NG for High Elevations
This Bosch AquaStar 2400ES-NG is approved for installation from 4500'...
  • Max Flow Rate (45° rise): 6.4 GPM
  • # Bathrooms: 2
  • Energy Factor: 82 %

Qualifies for Tax Credit
Bosch AquaStar 1600P-NG (Natural Gas)
Bosch AquaStar 1600P-NG (Natural Gas)
Bosch AquaStar 1600P whole house tankless gas water heater supplies...
  • Max Flow Rate (45° rise): 4.3 GPM
  • # Bathrooms: 1 Shower
  • Energy Factor: 69 %
Bosch AquaStar 1600H-LP (Propane)
Bosch AquaStar 1600H-LP (Propane)
Hydro-generated ignition system that requires no pilot, batteries or ...
  • Max Flow Rate (45° rise): 4.3 GPM
  • # Bathrooms: 1 Shower
  • Energy Factor: 84 %

Requires no electricity to operate
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Electric Tankless

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Stiebel Eltron Tempra 36 Whole House Tankless
Stiebel Eltron Tempra 36 Whole House Tankless
The Stiebel Eltron Tempra 36 electric tankless water heater is designed to replace...
  • Max Flow Rate (45° rise): 5.5 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 180
Stiebel Eltron Tempra 29 Whole House Tankless
Stiebel Eltron Tempra 29 Whole House Tankless
The Stiebel Eltron Tempra 29 electric tankless water heater is designed to replace...
  • Max Flow Rate (45° rise): 4.4 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 150
PowerStar AE125 Electric Tankless
PowerStar AE125 Electric Tankless
The PowerStar AE125 electric tankless water heater is designed to replace...
  • Max Flow Rate (45° rise): 3.7 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 120
Stiebel Eltron Tempra 24 Whole House Tankless
Stiebel Eltron Tempra 24 Whole House Tankless
The Stiebel Eltron Tempra 24 electric tankless water heater is designed to replace...
  • Max Flow Rate (45° rise): 3.7 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 120
PowerStar AE12 Electric Tankless
PowerStar AE12 Electric Tankless
The PowerStar AE12 is an electric tankless water heater that can provide 2 ...
  • Max Flow Rate (45° rise): 1.75 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 50
PowerStar AE115 Tankless Water Heater
PowerStar AE115 Tankless Water Heater
The PowerStar AE115 tankless hot water heater provides up to 2.6 gallons per...
  • Max Flow Rate (45° rise): 2.6 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 80
Stiebel Eltron Tempra 12 Electric Water Heater
Stiebel Eltron Tempra 12 Electric Water Heater
Requires 1 independent 240V AC circuits protected by 1 independent 60 amp...
  • Max Flow Rate (45° rise): 1.85 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 60
Stiebel Eltron Tempra 20 Whole House Tankless
Stiebel Eltron Tempra 20 Whole House Tankless
The Stiebel Eltron Tempra 20 electric tankless water heater is designed to replace...
  • Max Flow Rate (45° rise): 2.8 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 100
PowerStar AE9.5 Electric Tankless
PowerStar AE9.5 Electric Tankless
The AE9.5 electric tankless sink water heater - 240 volts, 9.5 Kilowatts.
  • Max Flow Rate (45° rise): 1.25 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 40
Stiebel Eltron DHC 10-2 Electric Tankless
Stiebel Eltron DHC 10-2 Electric Tankless
With an endless supply of hot water, smaller storage space, and reduced energy...
  • Max Flow Rate (45° rise): 1.50 GPM
  • Power: 208/240 Volts
  • Amps (Minimum): 50
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Electric Tank

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Ariston GL 6 Plus Gallon Electric Water Heater
Ariston GL 6 Plus Gallon Electric Water Heater
Ariston GL6 + mini-tank water heater stores 7.2 gallons of water.
  • Tank Size: 7.2 Gallons
Ariston GL 4 Gallon Electric Water Heater
Ariston GL 4 Gallon Electric Water Heater
Ariston GL4 mini-tank water heater stores 4 gallons of water.
  • Tank Size: 4 Gallons
Ariston GL 2.5 Gallon Electric Water Heater
Ariston GL 2.5 Gallon Electric Water Heater
Ariston GL 2.5 mini-tank water heater stores 2.5 gallons of water.
  • Tank Size: 2.5 Gallons
Stiebel Eltron 4 gallon Mini-Tank
Stiebel Eltron 4 gallon Mini-Tank
The SHC Mini-tank frees up precious space while providing plenty of hot water for...
  • Tank Size: 4 Gallons
Stiebel Eltron 2.5 gallon Mini-Tank
Stiebel Eltron 2.5 gallon Mini-Tank
The SHC Mini-tanks free up space while providing plenty of hot water for washing...
  • Tank Size: 2.5 Gallons
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Vent & Accessories

Accessories for gas tankless water heaters.

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D'Mand S-70T Instant Hot Water Pump
D'Mand S-70T Instant Hot Water Pump
The D'Mand S-70T pump provides instant hot water while saving you water, ...
D'Mand S-02T Instant Hot Water Pump + Kit
D'Mand S-02T Instant Hot Water Pump + Kit
The D'Mand S-02T pump plus plumbing kit for houses larger than 2,500 sq ft...
AQ3ES Horizontal Vent Kit for Bosch 2400/2700ES
AQ3ES Horizontal Vent Kit for Bosch 2400/2700ES
The AQ3ES Vent Kit transforms the Bosch AquaStar 2700ES...
D'Mand S-70T Instant Hot Water Pump + Kit
D'Mand S-70T Instant Hot Water Pump + Kit
The D'Mand S-70T pump plus plumbing kit for houses smaller than 2,500 sq ft...
Cuno AquaPure AP430 Scale Protection Water Filter
Cuno AquaPure AP430 Scale Protection Water Filter
The Aqua-Pure hot water protection system installs on the cold water feed ...
FX Vent Hood for Bosch Tankless Water Heaters
FX Vent Hood for Bosch Tankless Water Heaters
The FX Hood is a 4
SAVE $34.00!
AQ4 Power Vent
AQ4 Power Vent
Power vent kit for use with the Bosch 1600P and 1600H models...
D'Mand S-02T Instant Hot Water Pump
D'Mand S-02T Instant Hot Water Pump
The D'Mand S-02T pump provides instant hot water while saving you water, ...
Wireless Remote Control for Bosch 2400E & 2700ES
Wireless Remote Control for Bosch 2400E & 2700ES
Program your 2400E, 250SX and 2700ES tankless gas water heater to a comfortable...
Cuno AquaPure AP802 Whole House Water Filter
Cuno AquaPure AP802 Whole House Water Filter
The AquaPure AP802 whole house water filter is for use on homes with 4 or ...
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