I just had a 6000 BTUH Marine Air unit installed in my 2007 250cr. They located the unit and the pump underneeth the starboard cabin seat, the filter and intake under the step access. One supply near the return in the dinette table area, and one supply in the aft cabin. would have preferred running the cabin supply up thru the closet and discharge above the closet, however, you will use some closet space unless the cutout the closet wall most starboard side. New 30 amp shorepower, and breaker located by thermostat mounted by microwave. Only problem is must close intake valve before going underway, the lift of the bow will cause pump to loose prime. Hasnt been a problem since. Some may say to put pump and intake filter in the engine compartment. Install was done by a Monterey Dealer.