I had a new furnace installed last year and unfortunaly could not afford the ductwork portion. I know my trunks are grossly undersized and would like to replace them. I have done some calculating and it seems the other ducts are sized right but I would like to investigate further. Could anyone point me in the right direction. Any reference books I might look through or a Manual D worksheet perhaps. Thanks
New Ductwork Sizing
Oct 20, 2003
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