reply to Jaber
Re: Air Conditioning Cover I know somebody who has a heat pump in a snowy area. he basically built a plywood box around the heat pump with baffles on the sides/top to keep the device clear of snow in the winter. He also lined the inside of the 'box' with roofers insulboard but installed upside don (ie. insulation facing out)- the same stuff roofers use for torchdown membrane insulation. Has about 1" if mineral wool exposed to attenuate the sound of the heat pump when it's operating. Works quite well in my opinion.
He skinned the outside of the box with wood siding to match his house and put a low-pitch cedar roof on it, to dress it all up. Everything is held together with marine deck latches so it takes just a few seconds to disassemble the box for access.