To get email notification when someone adds to a thread you're following, click on the star in the thread's header and it will turn yellow; click again to turn it off. To edit your profile, click on the gear.
The Wall has a powerful search engine that will go all the way back to 2002. Use "quotation marks" around multiple-word searches. RIGHT-CLICK on the results and choose Open Link In New Window so you'll be able to get back to your results. Happy searching!
In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.

ac system design help

hey guys,

I have a potential customer who wants zoned AC in a small office space using a multi-split heat pump. Did a load calculation & found that each office requires 5-600 BTUh of cooling, obviously mini splits are a bad idea (smallest indoor unit I can find cools to 9000 BTUh.). So I am looking at other ideas.

The entire office suite is only 1250 sq ft and could in theory be cooled by one mini split if it were open concept, but each office/room requires its own zone.

I've been thinking about presenting the customer with other options, such as zoned ducted AC with a variable-speed air handler and motorized zone-valve style dampers. However, I'm not up on AC duct sizing. Don't want to undersize.

Is there a sizing rule-of-thumb for AC ducts, something I can do to get a basic calculation of sizing for the purposes of working up an estimate?

I am doing a duct design course this winter but this job came up too early!

Thanks guys! If anyone has other ideas on how to configure this system, I'd love to hear these also
·

Comments

  • RJRJ Posts: 421Member ✭✭
    sizing

    I would find someone with a background in ductwork to help.    Get a Trane Ductulator, the Trane air conditioning manual ( hard back book ) and fan curves on your equip. to get started
    RJ
    ·
  • JackJack Posts: 785Member ✭✭✭
    The minisplit is still your best bet

    You could do a multi unit and use the small concealed air handlers. They have very low static so position to minimize ductwork. Your other option is a minisplit and add a few Tjernlund Aireshares.
    ·
  • hwshws Posts: 43Member
    looks like

    Looks like it's going to be mini-splits after all. Owner doesn't want to compromise celing height. Thanks!
    ·
  • hwshws Posts: 43Member
    hello RJ

    I'm doing an air system design course hopefully this winter.

    Since I wrote the original post, I have acquired a ductulator and learned some useful formulas, which has opened my eyes quite a bit.

    Regarding the Trane AC manual - is it available directly from Trane? I don't see it on their website.
    ·
  • RJRJ Posts: 421Member ✭✭
    book

    available online  Bookmark Inc   1-800-642-1288, or check your local Trane supply house  $40.00,  well worth it
    RJ
    ·
This discussion has been closed.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!