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Thread: 94 or 80?

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  1. #1
    Join Date
    Feb 2005
    Posts
    4
    In replacing a furnice, we were told that the existing ducts would not handle an 80% furnice but that they would do fine on a 94%.
    Any idea why this is the case? or is it that they just want to sell a 94% furnice?
    Thanks

  2. #2
    Join Date
    Feb 2004
    Location
    chicago suburbs
    Posts
    4,422
    air doesn't care where it comes from. as long as it's sized (duct & furnace) correctly the furnace doesn't matter. i think they want to sell you the 94%er.
    FILL OUT YOUR PROFILE!!

  3. #3
    never heard of a 94% furance.cfm is cfm no matter what the %

  4. #4
    Join Date
    Aug 2003
    Posts
    1,841
    Originally posted by hot wired
    never heard of a 94% furance.cfm is cfm no matter what the %

    I think he is talking about a 90% furance.

  5. #5
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,587
    Yea, sounds like horsehockey to me too.

  6. #6
    Join Date
    Jun 2000
    Location
    WYO
    Posts
    2,019
    Either an 80% , or 94% efficient furnace can be sized correctly to your existing ductwork. The 90% + model is more efficient, and requires extra venting and condensate issues. The ductwork reasoning is not an issue , and I would recomend at least 2 other bids,based on that reasoning. Most reputable companies will give you a free estimate, at least here they do.
    never say never

  7. #7
    Join Date
    Apr 2003
    Location
    the Great Pacific Northwest
    Posts
    607
    Ask them to put it in writing, then find another contractor.
    Doesn't carrier claim up to 94% on their high end VS units.

  8. #8
    Join Date
    Jun 2000
    Location
    WYO
    Posts
    2,019
    Yes I agree, 94% could be a generalization (or lie) about actual efficiency. Generally, the rating of high eff. equipment by each manufacturer varies by the model #. The smaller units (40k - 60k btu,s ) have the higher eff. ratings, while the larger units have a lower eff. rating. Ask your contractor for specific ratings. Keep in mind unit must be properly sized & installed& adjusted to achieve these ratings.
    never say never

  9. #9
    Join Date
    Sep 2004
    Posts
    3,157
    I posted this in a thread the other day, I dont have the link right now but if you will go to the web site of "consumer reports" in their home and garden section they have a page that can answer all of the questions you may have

    also go to the energy star web site

  10. #10
    Join Date
    Sep 2004
    Posts
    3,157
    http://www.consumerreports.org/main/...=1110426474642


    it is a long link but I did a C&p and tried it and it is the link you need

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