About the only spot available to mount the small window AC unit was the large sliding window above the couch. I decided to build a wooden frame to support the unit for strength and to keep it off the metal frame of the window. I was worried about possible harmonic vibration . Materials used were pine 2×4, 1/4″ plywood to seal the space above the frame and 2 1/2″ deck screws to put it together. Cost was less than $25. The hardest part was getting the measurements exact and working with the curved frame of the window. The horizontal 2x4s brace against the inside of the window frame and prevent the window AC unit from tipping outward. The frame rests on the small lip on the inside of the metal frame and appears to be very secure. A snug fit helps in that respect.
Commercial Window AC's with Wi-Fi's enclosed fan motor seals out dirt and operates at a lower temperature than standard grade motors, effectively preventing overheating and therefore prolonging the life of the unit. Aluminum end plates prevent rusting while Duraguard paint, improved indoor and outdoor temperature monitoring, unique dual-stage air filtration, R-410A refrigerant and robust handles for quick removal and installation make these the only commercial window air solution on the market.
Almost all window AC units have washable mesh or foam filter screens. The filter is installed on a plastic frame right behind the front cover. In some models, it slides out of a slot in the front cover. It should be cleaned once a month during the cooling season. For foam filters, wash the filter under a faucet with warm water and a mild detergent. Metal or mesh filters can be rinsed under a faucet or with a hose to clean out any dirt and debris. You may need to consult the owner’s manual for specific instructions.