APUS Natural Gas Tankless Water Heater, 140,000 BTU, Up to 6.8 GPM, Indoor

A gas tankless water heater is sized by the flow it must deliver at the temperature rise your inlet water demands: read the stated maximum GPM, the BTU/h input, the fuel (natural gas or propane) and whether the unit is listed for indoor or outdoor mounting. Gas supply, venting and combustion air are decided by a licensed plumber or gas installer under your local code, not by a listing.

Exact listing: APUS Natural Gas Tankless Water Heater, 140,000 BTU, Up to 6.8 GPM, Indoor

Listing identifier: B0FHH8DGV7. View listing source.

Title identifies the seller's listing; it is not an independent performance test. Check the selected configuration, current price and seller on Amazon.

Fuel

Natural gas — Natural Gas Amazon listing title

Stated mounting location

Indoor — Indoor Amazon listing title

Stated maximum flow

6.8 GPM — 6.8 GPM Amazon listing title

Stated gas input

140,000 BTU/h — 140,000 BTU Amazon listing title

Stated voltage

120 V — 120V Amazon listing text

Run your fixtures and region through the flow-rate calculator, then compare the required GPM at your temperature rise with the maximum flow this listing states. Confirm the fuel, the indoor or outdoor designation and the venting family with a licensed plumber or gas installer under your local code before ordering.

These notes summarize source research, not hands-on testing. Read our research method.