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I had a LG mini-split system installed a couple of years ago (by Pacific NW Energy Service) and I love it. My 3 year-old house has forced hot water radiant heating so there was no existing duct work for a new A/C system to piggy back on to (unless I wanted to drop $20K to install ductwork). The mini-split system was a great solution because it required no ducts. They essentially put a heat exchanger outside and one (or more) cooling units on a wall inside the house. A simple conduit on the outside of the house carries electricity, a refrigerant line and a condensation line. A wireless remote runs the whole show inside. Granted, the mini-split system is much more expensive than one of those boxy window units. But what it does offer is that it is super-quiet (inside and out) and super-efficient. Even in the hottest summer months I can barely see a difference in my electric bill. It also means I don’t lose the use of a window. It also doesn’t create a security risk that a burglar might try to exploit.
This is the heat exchanger box on the outside. They can install it on a cement pad on the ground. But for my project they mounted it up on the side of the house.
And this is the inside part. If I recall correctly it is a 18,000 BTU unit. But they have more powerful units as needed. Mine will cool 1,800 square feet easily. The A/C guys came out and measured everything, including window area to calculate heat gain.
When it isn’t running the air grilles at the bottom slide closed so it is nothing but a solid panel. This model is from LG’s “Art Cool” line. If you’re averse to having a box up on your wall they even have some systems that are built to hide behind a large picture frame.
I’ve seen other systems in use across Asia from a range of manufacturers (LG, Mitsubishi, Sanyo, etc.) and they all seem to work the same way with the same efficiency.
I highly recommend!
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