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  1. #1
    Join Date
    Jul 2013
    Posts
    10

    Question Duct replacement

    hello everyone,

    I've been lurking at this site for the past few month and I'm new here. I will be replacing my whole duct system in the next two to three weeks and would like to seek advise from the pros here of what to ask for and what to look for?

    I'm in the San Francisco Bayarea, San Jose more specific. I currently have sheet metal duct with 7 supply lines and outlet, I'm adding 2 more supply lines when I've my whole duct system replace. The reason for the replacement is the previous owner well oversized the system for this 1200 sq home, it's a 4 ton AH and a/c condenser. the system is Payne 80% furnace and 10 seer condensing unit and it produce quit a bit of noise when system is running.

    thanks in advance for any advise or input.

  2. #2
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    5,990
    ABSOLUTELY DOES NOT APPEAR FROM BRIEF DESCRIPTION
    THAT A WHOLE NEW DUCT SYSTEM IS NECESSARY.

    http://www.climate-zone.com/climate/...cisco-airport/

    High HSPF 2 -ton heat pump + very small furnace might be the appropriate modification.
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  3. #3
    Join Date
    Dec 2010
    Location
    The Quad-Cities area (midwest).
    Posts
    2,482
    Quote Originally Posted by dan sw fl View Post
    ABSOLUTELY DOES NOT APPEAR FROM BRIEF DESCRIPTION
    THAT A WHOLE NEW DUCT SYSTEM IS NECESSARY.

    http://www.climate-zone.com/climate/...cisco-airport/

    High HSPF 2 -ton heat pump + very small furnace might be the appropriate modification.
    X2

  4. #4
    Join Date
    Jul 2013
    Posts
    10
    Quote Originally Posted by dan sw fl View Post
    ABSOLUTELY DOES NOT APPEAR FROM BRIEF DESCRIPTION
    THAT A WHOLE NEW DUCT SYSTEM IS NECESSARY.

    http://www.climate-zone.com/climate/...cisco-airport/

    High HSPF 2 -ton heat pump + very small furnace might be the appropriate modification.
    thanks for your suggestion but I don't live in San Francisco, I live in San Jose 40 mile south of San Francisco and the average temps. tends to be 15-20 degree higher consistently through out the year.

  5. #5
    Join Date
    Jul 2013
    Posts
    10
    correction* the winter months here are about the same or could be lower than San Francisco due to more inland and away from the ocean.

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