- Listed when
- A gas tankless water heater whose listing states an input of 180,000 BTU/h or more.
- Sorted by
- Input (BTU/h) (highest first)
- In the list
- The top 8 of 37 products in our catalog that meet the rule.
Rheem RTGH-95DVLN-3 199,900 BTU Natural Gas Condensing Tankless Water Heater
199,900 BTU/h, about 5.4 GPM at a 70°F winter rise, 9.5 GPM stated maximum; condensing gas tankless.
Rheem RTGH-95DVLP-3 199,900 BTU Propane Tankless Water Heater
199,900 BTU/h, about 5.4 GPM at a 70°F winter rise, 9.5 GPM stated maximum; propane tankless.
Rheem RTG-95XLN-3 199,900 BTU Natural Gas Outdoor Tankless Water Heater
199,900 BTU/h, about 4.4 GPM at a 70°F winter rise, 9.5 GPM stated maximum; outdoor gas tankless.
Rheem RTG-95XLP-3 199,900 BTU Propane Outdoor Tankless Water Heater
199,900 BTU/h, about 4.4 GPM at a 70°F winter rise, 9.5 GPM stated maximum; outdoor gas tankless.
Rheem RTG-95DVELP-3 199,900 BTU Propane Tankless Water Heater
199,900 BTU/h, about 4.4 GPM at a 70°F winter rise, 9.5 GPM stated maximum; propane tankless.
MIZUDO WCIU-HW199A1G-NG-M0 199,000 BTU Natural Gas Tankless Water Heater
199,000 BTU/h, about 4.4 GPM at a 70°F winter rise, 10.3 GPM stated maximum; non-condensing gas tankless.
MIZUDO WCIU-HW199A1G-LP-M1n 199,000 BTU Propane Tankless Water Heater
199,000 BTU/h, about 4.4 GPM at a 70°F winter rise, 10.3 GPM stated maximum; propane tankless.
ThermoMate CZ750NG Natural Gas Tankless Water Heater
199,000 BTU/h, about 4.4 GPM at a 70°F winter rise, 8 GPM stated maximum; non-condensing gas tankless.
How to choose between them
At a 70°F winter rise a 199,000 BTU condensing unit holds about 5.4 GPM, two showers and a sink; a 180,000 BTU non-condensing unit about 4.0 GPM. Check your own fixtures and inlet water.
At full fire these units burn 174 to 193 cubic feet of natural gas an hour. Work out your gas load before choosing; a gas fitter sizes the line.
Rankings follow the rule and order stated above, using makers' published specifications and listed prices. How we research · Disclosure