Our Top 10 Recommendations for Tankless Gas Water Heaters

Up-to-date pricing and reviews for tankless gas water heaters on the market

Bestseller No. 1

10,300 - 180,000 BTU
Comes standard with MC-91-1US Digital Controller with Error Code Indicator
82% Thermal Efficiency
Residential Temperature Settings: 98°F - 140°F
Commercial Temperature Settings: 98°F - 160°F (commercial controller must be purchased separately)

SaleBestseller No. 2

94-Percent Energy efficient with stainless-steel condensing heat exchanger
Intelligent electronic controls designed to increase energy efficiency and safety
Third party efficiency listed by AHRI
Up to 38-Feet of 3-Inch PVC Pipe or 5-Feet of 2-Inch PVC Pipe
Low Nox Version

SaleBestseller No. 3

Lifetime warranty
Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
Never run out of hot water with an ECOSMART tankless water heater
Patented Self Modulating Technology and design
ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98

SaleBestseller No. 4

SaleBestseller No. 5

Endless hot water for your entire home
V65iN HE High Efficiency Tankless Hot Water Heater - Natural Gas: Indoor Installation Only
Up to 6.5 GPM hot water flow rate (varies by groundwater temp)
Control-R 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode.
Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

SaleBestseller No. 6

Endless hot water for your entire home
RU199in Sensei SE+ Super High Efficiency Tankless Hot Water Heater - Natural Gas: Indoor Installation Only
Up to 11 GPM hot water flow rate (varies by groundwater temp)
Circ-Logic technology allows you to set recirculation patterns that coincide with your typical habits. Hot water is available when you need it!
Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

Bestseller No. 7

Endless hot water for your entire home
Power vented directly vertically (rooftop) or sideways (wall) via Stainless Steel CAT III Flue 3.5" Diameter Included (20")
LPG PROPANE GAS - European Model - Digital Display is in Celsius
Delivers 6.6 gpm of hot water with a 35°F Instant Temperature Rise (Equivalent to 5.5gpm with a 45F temp Rise)
Modulates heat output in response to the flow rate of water running through the unit

SaleBestseller No. 8

Exclusive Water Savings technology conserving up to 1, 100 gallons per year
157, 000 BTU (gas consumed per hour)
Exclusive Hot Start Programming minimizes cold water burst by staying in ready-fire state
Recirculation pump ready kit ready
For use outdoors with freeze protection up to -30 degrees

SaleBestseller No. 9

Bestseller No. 10

Modulates heat output in response to the flow rate of water running through the unit.
Power vented directly vertically (rooftop) or sideways (wall) via Stainless Steel CAT III Flue 3.5" Diameter Included (20")
NATURAL GAS - European Model - Digital Display is in Celsius
Delivers 6.6 gpm of hot water with a 35°F Instant Temperature Rise (Equivalent to 5.5gpm with a 45F temp Rise)
Certified for Installation in Manufactured (Mobile) Homes Pure Copper Heat Exchanger