Check the listing for details. Propane Tankless Water Heater Up to 4 GPM 98,500 BTU Instant Hot for Whole House. Color: Silver, Condition: New. Listed at 399.00 USD. [Max 4 GPM & 98,500 BTU] - The ThermoMate instant water heater delivers water hot enough for simultaneous use— at 105°F to a shower (2 GPM) and a kitchen faucet (1 GPM) — from a 62°F inlet. It reliably supplies a comfortable single shower even with a 40°F inlet temperature. No waiting time, no cold water shocks, perfect for busy households. With an advanced flow sensor, its built-in chip regulates heating 20,000 times/sec to keep water temperature within ±1°F for a stable. [Safety & Reliable] - This gas tankless water heater integrates 8 protections: boil-dry, freeze, flame-out, overheating, over-temperature, pipe blockage, high-temperature lock, and excessive air pressure. Equipped with 4 ceramic heating cores, it auto-activates frost protection when temperatures hit 41°F (5℃).