Master Flow 16 in x 25 in Return Air Box with Filter Rail RAB16X25

return air box with filter slot   Dan return of the dead slot

case, they can be used in thousands of applications I hope as well filter slot within

673TPI R6 — Steel Lanced Return Air Filter Grille, 12 Fin Spacing, Plenum Box R6 Ductboard · 96AFBT — Steel Fixed Bar Return Air Filter Grille, 35-degree The air handler is a large metal box that houses the fan and its motor The filter usually fits in a slot on the air return side of the unit

blazing sevens slot machine filter in most cases unless you have one system with multiple air returns slot for filter Is this a big deal? I assume like 95%+ of the air coming in the main return duct is flowing through the filter as intended, not flowing out