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6 ton staged AC

hot_rod
hot_rod Member Posts: 25,484
in THE MAIN WALL
IMG_0637.jpeg

from an IG post

Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream
9326yssh

Comments

  • pecmsg
    pecmsg Member Posts: 6,386

    And Portable!

  • mattmia2
    mattmia2 Member Posts: 13,834

    i'm guessing the only part of that they paid for was the welding rod and the paint

  • ratio
    ratio Member Posts: 4,091

    A fraction of the cost of a packaged unit, plus built in redundancy & hot swappable to boot!

  • hot_rod
    hot_rod Member Posts: 25,484
    https://forum.heatinghelp.com/discussion/comment/1860096#Comment_1860096

    rent it to your neighbors if you are out of town!

    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • EBEBRATT-Ed
    EBEBRATT-Ed Member Posts: 18,370

    Seems to me you would get air recirc problems off the condenser and evaporator.

  • mattmia2
    mattmia2 Member Posts: 13,834

    maybe some. you could add baffles if it is a problem.

  • The Steam Whisperer
    The Steam Whisperer Member Posts: 1,299

    Most window units draw from the side and exhaust out the back, so recirc outside is probably not an issue. Maybe inside more so of a potential recirc problem.

    I find this potentially a very sensible solution. Our single window unit costs way less to run than neighbors's central air and we get 15years or more life out of the unit. Then it only costs a few hundred dollars to replace instead of thousands.

    I am considering a similiar set up for my own church to get cooling for the Sanctuary and Social hall. The narrow windows look like they may limit use to 5,000 btu/hr each unit (from Menards), so we could get about 2 1/2 tons of cooling… enough to make things pretty comfortable on Sundays for a cost of about $1,000.00 instead of the tens of thousands I know other churches have spent for central cooling.

    If anyone knows of standard larger units with a width under 17 3/8 inches, let me know ( there are casement style window units, but usually are pricey per btu of cooling).

    Of course if typical ductwork is installed, they also end up spending more for heating due to the extra air leakage.

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  • The Steam Whisperer
    The Steam Whisperer Member Posts: 1,299

    The staging is also probably a big energy saver. The EER rating of many window units used to be much higher than that of 14 to 18 SEER central units, particularly if you add the additional power draw of the duct fan ( that also adds cooling load) and the outdoor fan.

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  • mattmia2
    mattmia2 Member Posts: 13,834

    I have seen packaged units ducted in and out 2 windows for spaces like that, works reasonably well for a large open area and is quieter than a window unit. Looks like the 3/4 ton casement unit is the standard size for those. In the old days I think Whirlpool made a bigger casement model. Could use the type that sit on the floor and duct out the window too, then you wouldn't be limited by width.

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