For many years ductless air-conditioning systems have been the quiet solution for cooling and heating problems around the world. Pioneer Gas Furnace proudly features the popular and proven Mr. Slim a/c system. Your home can now be more comfortable than ever with the Mr. Slim M-Series. You don’t need ductwork or a window space. The sleek wall-mounted indoor unit mounts discreetly high on the wall. The outdoor unit is slim and requires minimal ground space or service clearance. Mr. Slim is the perfect solution for those offices and zones within your commercial establishment that are never the right temperature.