info:howto:duct_sizing_rules_of_thumb
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Duct Sizing Rules of Thumb
General rule would be that 1sq“ of filtered return will move 2 cfm.
Figure unit tonnages at 450-CFM per-ton of cooling.
Therefore our 2 1/2 ton unit upstairs needs 1125 CFM of air movement.
info/howto/duct_sizing_rules_of_thumb.1247755970.txt.gz · Last modified: 2009/07/16 10:52 (external edit)