Grilles, registers, and diffusers probably don't get the attention they deserve. Several manufacturers are finding ways to make these products more appealing, and most of all, a more integral part of ...
The Criti-Clean fan filter unit (FFU), a fan-powered laminar flow HEPA filter diffuser, is a computer-controlled FFU. It features a variable-speed electronically commutated motor, stainless steel ...
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