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  1. #1
    Join Date
    Aug 2009
    Posts
    52

    Two Stage Furnace Setting

    I am considering purchasing an Amana AMV95, two stage, variable speed furnace. The first stage runs at about 70%. Can this be lowered to 40-50% and would this be advisable? Would it change the efficiency or be less comfortable? I ask because I have noticed that the more high end systems can run the first stage at 40%.

    I ask because it seems like this would provide more steady heat and less cycling.

    Thank you

  2. #2
    Join Date
    Nov 2008
    Location
    Chapel Hill, NC
    Posts
    1,070
    Most 2 stage furnaces run at about 70% on the first stage. I think you'll need a modulating furnace to get as low as 40%. I don't think you can adjust the two stage furnace output significantly.

  3. #3
    Join Date
    Dec 2005
    Location
    Cincinnati, Oh
    Posts
    4,926
    I've put in tons of amv9's with 2 stage, and you cant "turn it down". It's whatever amana has stage 1, and stage 2 set at. The only way to "adjust" it, would be doing something against the manufacture's suggestion.
    "Better tell the sandman to stay away, because we're gonna be workin on this one all night."

    "Dude, you need more than 2 wires to a condenser to run a 2 stage heatpump."

    "Just get it done son."

    Dad adjusted

  4. #4
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,755
    If you want a lower percentage firing rate.
    You need to get a mod furnace. And Amana currently doesn't make one.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

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