Discussion Starter · #1 ·
I am calculating friction rate loss for some ductwork I may do but I am having trouble locating the EL value for a commercial size air diffuser. If I had a copy of Manual Q , I may find the answer. Anyone know what's the EL value of the air diffuser in my picture? It is the air diffuser in the middle top side of the picture. 2ft by 2ft air diffuser.
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