How to Install a Ductless Heat Pump

A heat pump.
  • 8-10 hours
  • Advanced
  • 1,000
What You'll Need
Conduit insulation
Air filters

A ductless heat pump is energy efficient and heats and cools rooms evenly. A ductless system can be set up in zones and is easier and less expensive to install because there is no ductwork. Decide the location of the indoor air handler, consider the noise level, how it will affect air circulation, and the power available. Finally contact any professionals you will need such as an electrican for the power supply and an air-conditioning specialist to charge the unit.

Step 1 - Plan the Installation

Choose the right size for the square footage of the home. Also consider the climate and amount of usage the unit will get. Decide where the opening will be made in the exterior for the conduit.

Step 2 - Install Outdoor Unit

Prepare a 4-inch slab of concrete with a gravel base. It must be positioned with the connectors facing the house and not closer than about 1-foot from the house. Make sure the vents will not be blocked by shrubbery or other outdoor structures. There are also units that can be affixed to the wall of the house.

Step 3 - Power Supply

You may need a professional electrician to provide the correct power for your heat pump. There should be a 208 volt to 230 volt power supply to the outdoor unit with an electrical disconnect and a breaker specifically for the heat pump. Inside you will need the correct voltage power supply from the breaker panel to the air handler.

Step 4 - Run Connection into the House

Make a 3-inch hole in the exterior of the home that runs inside so that the wiring can be connected to the house. The location nearest the place where the conduit runs into the house may be the easiest for insulation.

Step 5 - Connect the Units

Wrap the gas line with insulation. Use the conduit to connect the air handler to the compressor on the outdoor unit. Be sure all of the connections are tightened.

Step 6 - Install the Drain

Now run a condensate drain using tubing and then connect the refrigerant line to it. The drain should be routed to the main sewer drain.

Step 7 - Charge the Unit

Have the refrigerant charged up on the unit. Usually, this is done by a professional with a license to purchase and use the refrigerant.

Step 8 - Maintenance

Maintaining the system will ensure that it remains energy efficient and works well. Clear the air filters once a month and keep the units clean. Check outdoor coils for blockage seasonally. Don't forget to check the condensate pan and drain to see if it is draining freely. Finally, change batteries in any wireless controls.

Installing a ductless heat pump can make your home more comfortable. It can also save you money due to its energy efficiency.