EffectiV HVAC » acoustical diffusers

Why Use Plenums With 2' x 2' Square Ceiling Diffusers?
We get this question often when comparing the cost of a simple diffuser with integral backpan versus a diffuser face with a separate plenum. Why have a plenum? Why not just an integrated backpan? It would be cheaper, more compact and already assembled.Plenum boxes have multiple features which are mu ...
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