
d. Return air openings must have 40 square inches minimum free area including the filter. e. Return air to the air conditioner must be filtered to prevent dirt accumulation on air conditioner cooling surface. 5. Air Distribution System Installation a. Dometic Corporation recommends the basic configuration shown on page 7, for installing this air conditioner system. We have found by testing, that this configuration works best in most applications of this air conditioner system. It is the responsi