| Find the rating plate for the furnace in the burner compartment and post the rated BTU input for the furnace.
Inspect the gas meter dial and check to see id it has a 2 foot dial. If so that measures two cubic feet of gas consumed for each full revoloution of the pointer.
Or there may be a 1' dial.
Make sure the main burners on other gas equipment you have wont turn on while doing the following test:
Turn the furnace thermostat up so that the furnace turns on and stay on. Measure the number of seconds it takes for the two foot dial to make one full revolution, or for the one foot dial if there is no 2' dial.
Post the number of seconds and which dial you used to measure it. |