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Hour meter for 24 VAC furnace

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  • Hour meter for 24 VAC furnace

    I keep my new garage addition warm at all times. The thermostat goes down to 50 degrees F and that is fine for me. The garage is well insulated: R30 ceiling, R14 walls, concrete slab insulated. The gas bill doesn't seem to be affected very much but I am curious as to how long the burner does run. It is a Williams wall furnace with optional circulating fan that runs when a thermal switch is closed. I could put an hour meter in the circuit for the fan easily enough but the fan runs a long time compared to the burner. An hour meter in the thermostat circuit would indicate on time. I did find a 24 VDC hour meter but not one for AC yet. It's not worth buying a real data logger unless there are some real cheap ones. Any suggestions?


  • #2
    I was going to suggest just getting one of the smart WiFi thermostats. I have one in my garage/shop (Honeywell WiFi 9000). It allows me to control it from my iPhone or any web browser. It also sends you a monthly "usage" report showing a graph of the usage during the month, as well as previous months for comparison.


    • #3
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      • #4
        While you're in the shop time the burn vs fan run time. Note the times and after a dozen or so readings take an average of the burn vs fan run times. Then you can use a regular 110VAC hour meter and just apply the burn time factor to get a pretty good idea of the burn time.
        Chilliwack BC, Canada