A tankless natural gas water heater lists an input of 199,000 BTU/hr. Using 1,000 BTU per cubic foot, what gas demand must the branch supplying it be sized for?

Giải thích

Divide input by heating value: 199,000 divided by 1,000 equals 199 cubic feet per hour. High-input tankless heaters often need a larger branch and meter than a tank-type unit because of this large instantaneous demand. Verify the meter and upstream piping can also supply this cfh at the required pressure.