How to Install a Ductless Mini-Split Air Conditioner | This Old House





This Old House plumbing and heating expert Richard Trethewey explains how to install a mini-split air conditioner. (See below for a shopping list and tools.)

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Richard traveled to Tampa, Florida to help a homeowner find a cooling solution for his garage. The homeowner used the garage as a workshop in the summer months, but said that it was too hot and humid in there to work comfortably. To solve the problem, Richard and local expert David Zimmerman installed a “mini-split” air conditioner. The system uses no ductwork. Instead, an air-handler unit is mounted inside on a wall, and the condenser unit is mounted outside.

Shopping List for How to Install a Mini-Split Air Conditioner:
– mini-split air conditioner [https://amzn.to/2vyimyj]
– ground pad [https://amzn.to/2Veahyb], for supporting condenser unit
– 1-inch-diameter PVC pipe and assorted fittings [https://amzn.to/2WkL6q7], used as condensate drain line
– PVC primer [https://amzn.to/2GQcbe7] and cement [https://amzn.to/2vxt6x3], used to join together PVC drain line 5. armor-sheathed electrical cable [https://amzn.to/2PKKGH1], provides line-voltage power to the air conditioner
– low-voltage wire [https://amzn.to/2LkaPOu], sends signal from air conditioner to condenser

Tools for How to Install a Mini-Split Air Conditioner:
– drill/driver [https://amzn.to/2UR4vxf]
– 1 _-inch hole saw [https://amzn.to/2IVdvjo], used to make hole for refrigerant lines
– level [https://amzn.to/2ZVAu3l], used to level pad that supports condenser unit
– drywall saw [https://amzn.to/2WjOQIz] or jigsaw [https://amzn.to/2PKAgar], used to cut hole in interior wall
– hammer [https://amzn.to/2ZTYvYy]
– pliers [https://amzn.to/2Vbozzj]
– wire strippers [https://amzn.to/2LkgVhP]

The “Mr. Slim” ductless mini-split air conditioner was manufactured by Mitsubishi Electric [https://metahvac.com/].

It was Installed by David Zimmerman, Zimmerman’s Air Conditioning & Heating, Inc.

Additional assistance was provided by Ryan Hansen, electrician, Hansen Electric, Inc.

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How to Install a Ductless Mini-Split Air Conditioner | This Old House
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