Suburban furnace min. air return grill size?
While looking at our furnace and heating setup today in our TT, it looks like I can easily do some modification to the furnace return air grill location to improve the heating and I could also turn th...
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I have it in this pdf file naturally, the specs are on a page I scanned upside down, but for all but the over 40k btu/hr models it is 55 square inches. It gives ducting, as well.
That is for older models, but I cannot imagine they have changed that much.
That is for older models, but I cannot imagine they have changed that much.
