Do it yourself

How you would install one of these units depends in large on whether you have a rafter or truss type roof and where in the house you would wish to put it. If the roof is rafter type and the fan were to go into a hall way it would be possible to cut one of the ceiling joists and box to accept the louvered opening with the fan installed in the attic. If it is a trussed roof, the ceiling joists can not be cut and it is necessary to box between the ceiling joists and drop the opening enough to accept the louver assemble and then some framing and boxing must be placed in the attic space to direct the air flow from the opening to and open space where the fan will fit. There might also be the problem of getting the fan itself up into a trussed attic space. I have seen where the exhaust fan was placed so that it drew on the attic as well as the house but this usually results in dislodging the insulation and causing other problems, unless the attic is sealed and floored and then the air flow can be directed through the attic door. There are just too many variables to be able to make one definitive answer address all possibilities. Dale in the Flat Lands