10 bestEco Friendly Water Heatersof April 2026
112M consumers helped this year.
1
Thermo 2000 Mini BTH 12 kW / 40,944 BTU Electric Boiler for Water and Glycol Radiant Floor hydronic Heating System
Thermo 2000
9.8
17% off
2
Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, Small Grey
Rheem
9.6
3
Thermo 2000 Mini BTH 4.5 kW / 15,354 BTU Electric Boiler for Water and Glycol Radiant Floor hydronic Heating System
Thermo 2000
9.4
4
Rheem RTEX-27 240V 3 Heating Chambers Residential Tankless Water Heater
Rheem
9.1
5
CAMPLUX Tank Water Heater Electric,38L (10 Gallons) Point of Use Instant Hot Water Heater 120 Volt 1500W, Built-in Reliable T&P Relief Valve, Anode Rod for Hot Water Heater, UL Listed
CAMPLUX ENJOY OUTDOOR LIFE
8.8
Other
Tankless Water Heater, thermomate 5L Portable Propane Gas Water Heater with Overheating Protection, 1.32 GPM, Outdoor Instant Water Heater for RV Camping, 34,000 BTU/Hr, Easy to Install, Black
Eemax EEM24013 Electric Tankless Water Heater, Blue
Abhirsh Aquarium Heater 100 Watt - Reliable Fish Tank and Immersion Water Heater, Adjustable Temperature Submersible Thermostat Heater for 10-25 Gallon (100W)
1.58 GPM, 34,120 BTU's Natural Gas Flow Activated Gas Tankless Water Heater
6
Stiebel Eltron Tankless Heater – Tempra 12 Plus – Electric, On Demand Hot Water, Eco, White
Stiebel Eltron
8.6
7
Navien Mate EQM 350, Queen – EMF-Free Water Heated Mattress Pad – Dual Temperature Control – Non-Electric Bed Warmer – Eco-Friendly – Helps Soothe & Relieve Stress, Muscle Soreness, & Tension
Navien Mate
8.3
8
CAMPLUX 65,000 BTU RV Water Heater, 2.64 GPM RV Tankless Hot Water Heaters with 15.2×15.2 Inches Door and Remote Controller, Propane Tankless RV Water Heater with Mixing Tank DC12V/5A
CAMPLUX ENJOY OUTDOOR LIFE
8.0
9
ThermoDrain TDH3320B-DR-PEX high performance drain water heat recovery unit - factory installed PEX fittings
ThermoDrain
7.7
10
Eemax EEM24018 Electric Tankless Water Heater, Blue
Eemax
7.4
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