Checking combustion on miller mobile home furnaces

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Hey how do you guys check combustion on these furnaces without going on the roof? Miller downflow mobile home furnace. Model # M1BB086ABW

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  • HVACNUT
    HVACNUT Posts: 7,784
    edited February 15

    Miller doesn't mention combustion in the manual. They mention draft and adjust for efficiency. 🤪

    I take the readings over fire. You can't put the analyzer probe over fire, but I have one of these for EK boilers that I also use on Miller/Nordyne with the concentric venting. Wrap a rag around it at the door to prevent drawing air.

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    szwedjRobert_H