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  1. #1

    how to connect the peimeter duct in concrete slab to addition area?

    Hi everyone,
    I am working on a house addition project in chicago, IL area.
    The existing house has a perimeter loop duct in concrete slab. how do i extend the existing duct (actually, it's like a big PVC pipe in the concrete slab) to addition area?
    Or do you guys have any recommendation to heat and cool the additional space, it's about 300 sf. i am also thinking to install a mini-split heat pump if the duct connecting isn't possible.
    any comments will be appreciated!

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,308
    Mini split. The duct isn't sized to handle the addition.
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  3. #3
    Join Date
    Apr 2008
    Location
    Alberta Canada
    Posts
    2,246

    call a contractor

    You should call a contractor to make sure the duct size and furnace size is compatible for the addition.
    Quote Originally Posted by GT2008 View Post
    Hi everyone,
    I am working on a house addition project in chicago, IL area.
    The existing house has a perimeter loop duct in concrete slab. how do i extend the existing duct (actually, it's like a big PVC pipe in the concrete slab) to addition area?
    Or do you guys have any recommendation to heat and cool the additional space, it's about 300 sf. i am also thinking to install a mini-split heat pump if the duct connecting isn't possible.
    any comments will be appreciated!
    Do it right the first time.

  4. #4
    Join Date
    Jul 2007
    Location
    Chicagoland
    Posts
    479
    A mini split is a good choice for cooling but heat pumps and chicago winters dont mix! Consider a "through the wall" unit also called a PTAC with electric heat.

  5. #5
    Thanks for all you guys' comments.
    The contractor has verified the enough furnace capacity to handle addition space. The big issue is the duct connection to the addition.
    Does it have any problem when existing area runs forced air heat and the addition runs mini-split at the same time?
    thanks again!

  6. #6
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,308
    The furnace may be big enough, but the slab duct won't be.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

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