Gas-Meter Clocking (Actual Firing Rate)

From the seconds for one revolution of a known test dial, the dial size, and the fuel heating value (default 1030 BTU/cf natural gas, ~2500 LP), the gas flow in cfh and the input in BTU/hr, with a firing-on-rate / overfired / underfired verdict against the nameplate. Clock with every other gas appliance off.

cfh = (3600 / seconds-per-rev) x dial size; actual input (BTU/hr) = cfh x heating value. Verdict compares the clocked rate to the nameplate within 5%.

First-principles meter-clocking arithmetic (public); the heating value is an editable field.

The clocking arithmetic is public; the gas utility's actual heating value governs the result.

Estimate. AHJ and licensed professional govern.

Field names used by the API: sec_per_rev, dial_size_cf, heating_value_btu_cf, nameplate_input_btuh, cfh, actual_input_btuh

• Heating value default 1030 BTU/cf natural gas (about 2500 for LP), editable; the gas utility's actual value governs and varies by supplyfield practice
• Method time one full revolution of a known test dial with every other gas appliance off (pilots included)utility meter-clocking method
• Verdict band within 5% of the nameplate is firing on rate; above is overfired, below is underfiredfield practice