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  1. #27
    Join Date
    Mar 2013
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    Billington Heights, NY
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    Are you serious right now? Really? sq ft per cfm? do you stand at the curb with the small, medium, large picture of houses and size AC , too?

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  3. #28
    Join Date
    Jul 2018
    Location
    SeaTac WA
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    772
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    Thread Starter
    Quote Originally Posted by HVAC_Marc View Post
    Are you serious right now? Really? sq ft per cfm? do you stand at the curb with the small, medium, large picture of houses and size AC , too?
    Get your manual J out you can go to a website I can show you also most of the time for AC it breaks down to 1 CFM per square foot. You live in the New York you should be selling like crazy to speed equipment you can size for the big Hot 100 degree heat index. You're probably dealing with houses with not so good r factor lot of old stuff. I've seen people try to size stuff in New York 500 CFM per ton. I've seen it not work a lot back there when I lived on Long Island. The two speed equipment is grayed out on the East Coast because when you have those warm muggy nights you can try the house out out really good on the low-speed and don't need the whole system. Here on the West Coast we don't have that problem.

    Sent from my SM-J700T using Tapatalk

  4. #29
    Join Date
    Jul 2018
    Location
    SeaTac WA
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    Thread Starter
    Check out the cheat sheet

    https://www.alpinehomeair.com/estima...bocwbsqavd_bwe

    Sent from my SM-J700T using Tapatalk

  5. #30
    Join Date
    Mar 2013
    Location
    Billington Heights, NY
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    Quote Originally Posted by thekux View Post
    Check out the cheat sheet

    https://www.alpinehomeair.com/estima...bocwbsqavd_bwe

    Sent from my SM-J700T using Tapatalk

    Your cheat sheet increases the size of my ac by 50%, and halves the size of the needed heat, for my area.

    I dont need to sell to make a good living. I fix, repair, and adjust systems for best performance. My last system install was last week. The one before that was 2 years ago. Knowing your shit, and knowing how to use tools, means a hell of a lot more than cobbing in new systems.

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  7. #31
    Join Date
    Jul 2018
    Location
    SeaTac WA
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    Thread Starter
    In Washington state I go around with about 50 BTUs for a furnace per square foot. Are you upstate New York? I lived on Long Island and I seen people size stuff at 500 square foot per ton sometimes I think that's a little short I've seen that not work so good. Being a little tiny bit big doesn't hurt you in AC period being short does and I've seen people in the aop Forum complain about their units not cool in their homes. I've never had that issue I try to get nothing less than 1 ton for 500 square feet. And on the East Coast you have some pretty nasty heat index is to deal with. Maybe do a lot of new construction and you have awesome are factors and that might be higher able to get by with the last but it won't work on a lot of stuff if you're doing 600 square foot per ton of course if there's a bunch of glass and things like that then you got to factor in all that the homes I do don't have those unusual things like lots and lots of glass

    Sent from my SM-J700T using Tapatalk

  8. #32
    Join Date
    Mar 2013
    Location
    Billington Heights, NY
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    Pros dont size sq ft per ton or btu. Capisce?

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  10. #33
    Join Date
    Jul 2018
    Location
    SeaTac WA
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    Thread Starter
    Get your manual J out I'm telling you I'm close. That three-and-a-half ton AC job that I put on that guy's house with a 17-inch furnace that's offset coil 2 tons could have never cool that place. When I went through the house you can hardly feel the air flow with the two tons of are going it felt almost non-existent. Heating especially here on the West Coast and where it's not freezing like it is where your at is a lot more forgiving than the cooling side when it comes to low air flow

    Sent from my SM-J700T using Tapatalk

  11. #34
    Join Date
    Jul 2018
    Location
    SeaTac WA
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    Thread Starter
    I'm going to tell you about a service call I had. I saw don't ask me how it worked a 3 ton package unit with one 8in Outlet. I couldn't believe the thing didn't go off on high temperature or freeze up the coil but it actually kept running but so much air force was coming out of the outlet would blow the veins on the guys window in this office all over the place. So I could tell you guys you can push a little more CFM through existing ductwork and not have a problem. Unless your return is massively undersized to begin with I do look at that big time and I do my best to measure it up.

    Sent from my SM-J700T using Tapatalk

  12. #35
    Join Date
    Mar 2004
    Location
    SE Michigan
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    Would never pass inspection here in MI. This is what we call a hack installation.
    “Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery.”

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  14. #36
    Join Date
    Apr 2007
    Location
    Amarillo by mornin'
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    989
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    Besides the furnace, I am wondering what the PVC pipe with the concrete cap is/was.
    "It's not that I'm smart, it's that I stay with the problem longer”
    Albert Einstein

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  16. #37
    Join Date
    Jul 2018
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    SeaTac WA
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    Quote Originally Posted by coolwhip View Post
    Would never pass inspection here in MI. This is what we call a hack installation.
    Where's all the write ups?

    Sent from my SM-J700T using Tapatalk

  17. #38
    Join Date
    Jun 2014
    Location
    Dover, DE
    Posts
    10,665
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    So are these all side jobs away from your school district job you said you had?
    “I haven’t failed. I’ve just found 10,000 ways that won’t work.” - Thomas Edison

    “It’s not whether you get knocked down, it’s whether you get up.” - Vince Lombardi

    "In this house we obey the laws of thermodynamics" - Homer Simpson

    Local 486

  18. #39
    Join Date
    Mar 2015
    Location
    Hamersville, Ohio
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    6,293
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    Quote Originally Posted by DavidDeBord View Post
    That Depends upon The Manufacturer & The Governing Authority.

    Provide the Town/ County/ State where this is installed, as well as the Md# & Ser# of the Coil, & we'll See whether it's required or not.
    Provide the Above Data Kux.
    Hos 4:6 My people are destroyed for lack of knowledge. Because you have rejected knowledge, I will also reject you, that you may be no priest to me. Because you have forgotten your God’s law, I will also forget your children.


    "You've got to Stand for Something or You'll fall for anything" (A. Tippin)


    Mat_15:24 But he answered, “I wasn’t sent to anyone but the lost sheep of the house of Israel.”

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