Abstract: In a room air conditioner, at least the condenser, and preferably both the compressor and the condenser, are separated from the main body of the air conditioning apparatus, and are mounted in an exteriorly facing wall, outside the room which is to be cooled. The main body of the air conditioning apparatus is connected with compressor and condensor mounted in the wall by connecting piping and fittings and is mounted on the wall by a hanging bracket and position-fixing spacer bracket.

Abstract: An air cleaner comprises a dust collector of the positive corona using high voltage source, for example DC 7KV, to collect the dust particles in the air, a plurality of ionizing wires function as the heating wire, and the separate voltage source for the ionizing wire is a relatively lower voltage source, for example DC 24V, DC 48V, which may be overrided comparing with the voltage difference between the electrifying panel and the ionizing wire so as to prevent the ill influence on the electrifying function and the dust collecting function. Therefore, an air cleaner can combine air with heating a room so as to make air in the room comfortable.