With winter finally setting in, and being the first year in our new house I would like to put some sort of measurement on how often the furnace is working, before I get the bill. Are there any known methods of measuring how much fuel furnace is consuming, other than monitoring the gas meter outside the house? What is the best way?
Some of the more advanced thermostats will track how often they are running. I have a Filtrete Wifi-Enabled Progammable Thermostat. It gives you a per-day total of how often the heat and A/C are run. You can also download an hour-by-hour export of the usage in CSV format.
I am in no way affiliated with this company. It is simply a product I have installed at home
It also gives you an idea, for a given temperature change, what the % change in heating cost will be:
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Most furnaces have an AC component that is powered on when it is running. Put a ac clock in parallel with this. For up to 12 hr this will tell you the time the device is running. Other types of timers will go for longer. Most furnaces run at two speeds stop and full.