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  1. HVAC
    I am part way through a renovation. We have moved a number of walls, re-organized the plumbing, electrical, etc.. The reality of our house is very different from what it used to be, and I am trying to size the return and supply ducts properly to each of the sections of my house. I'm looking for...
  2. HVAC
    I have a question about how to calculate duct size when there are multiple supply or return vents in the same room. Say I have a room that requires 400 cfm. Using a ductulator for flex ducting tells me I need 11" diameter. Now if I have two vents at opposite sides of this room, how do I...
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