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  1. #14
    Join Date
    May 2014
    Location
    Bay Area California
    Posts
    25,305
    Post Likes
    I always figured 90% or better was high efficiency. Wasn't that Lennox pulse something like 95%?

    I put in a 80% at my house over twenty years ago and it has been serving me well.
    If you were a real tech, you'd solder a relay on that board and call it good to go.

    I do a triple evac with nitro to remove non condensables.

    I use 56% silver on everything except steel.

    Did you really need the " If you were a real tech " ??

  2. #15
    Join Date
    Aug 2006
    Posts
    3,296
    Post Likes
    It has a Pretty Label on it that says, "High Efficiency"
    Retired, after 43 Years

  3. #16
    Join Date
    Sep 2005
    Location
    Atlanta GA area
    Posts
    42,333
    Post Likes
    Quote Originally Posted by timebuilder View Post
    I don't have a dog in this fight, but my understanding is that "high efficiency" starts with the first condensing furnace in the product lineup. I would guess that starts at around 90%.

    Agree...

    However there are lots of sales gimicks out there...
    GA-HVAC-Tech

    Your comfort, Your way, Everyday!

    GA's basic rules of home heating and AC upgrades:
    *Installation is more important than the brand of equipment
    *The duct system keeps the house comfortable; the equipment only heats and cools (and dehumidifies)
    *Cheap is not good, good is not cheap; however expensive is not a guarantee of quality!
    Choose your contractor wisely!

  4. #17
    Join Date
    Dec 2019
    Location
    San Jose
    Posts
    9
    Post Likes
    In my mind, it is hard to get 90+, I will not to buy it if I were in you situation. I believe it a condensing furnace .

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