[vipermanden]

But how is it actually blowing air into the 5er, with no units on? So in the winter, like tonight, when we use our heater, we should leave this open? But in hot months, close it off? It does not look like a duct, it looks like you are looking into the basement, like you said? I'm sure our two Golden retrievers have deposited a bunch of hair down in there? So you are supposed to take it off with the 4 screws, so you can vacuum down in there?