About Duct-Free Systems. A duct-free system, also known as a "split" air conditioner system, is made up of or includes two components: an indoor unit to deliver conditioned air to the room, and an outdoor unit located outside of the house.
Need a portable air conditioner for your home? You've come to the right place! If you've been shopping for a portable AC recently, then you know there are a LOT of choices on the market - from small hand-carried units for a small home office or bedroom, to semi-permanent units meant to serve multiple rooms.
All air conditioners have four basic components: pump, evaporator, condenser, and expansion valve. Hot refrigerant vapor is pumped at high pressure through the condenser, where it gives off heat to the atmosphere by condensing into a liquid.