Return Duct Takeoffs

Discussion in 'HVAC Heating & Cooling' started by Gregory Morris, Feb 16, 2018.

  1. Gregory Morris

    Gregory Morris New Member

    Joined:
    Feb 16, 2018
    Location:
    Connecticut
    I'm in the process of installing return ductwork for a new heat pump installation. I fully understand the reasoning behind keeping supply takeoffs 18"-24" from an end cap to allow the duct to pressurize and ensure even airflow at the takeoffs further upstream.

    My question is simply, does this rule of thumb also apply to return takeoffs in individual room return systems? I can't imagine that it would, but I've found remarkably little discussing this.
     
  2. WorthFlorida

    WorthFlorida Panama Canal’s new locks!

    Joined:
    Oct 28, 2009
    Occupation:
    Retired
    Location:
    Orlando, Florida
    For returns it's the square inches of the return grills and duct work. Too much restriction and there be poor air flow over the A/C coils or phelmun. Google "sizing return air duct" and there is plenty of information out there.
     
  3. Sponsor

    Sponsor Paid Advertisement

     
Similar Threads: Return Duct
Forum Title Date
HVAC Heating & Cooling Humidifier Installed in Return Duct Feb 7, 2018
HVAC Heating & Cooling Can forced air supply duct be run through panned returns? Oct 28, 2013
HVAC Heating & Cooling noisy return air duct Feb 9, 2010
HVAC Heating & Cooling Air Return Duct Dec 30, 2009
HVAC Heating & Cooling Underground air return ducts for HVAC Aug 6, 2008

Share This Page