How to Mount Brackets for Wall Mount Mini Split Systems


Mini split systems for heating and cooling are gaining popularity in North America. Ductless installation, small sized units and quiet efficiency make the mini split system an advantage for heating or cooling an isolated space, such as a single room or efficiency apartment. The wall brackets support the outdoor condenser of a ductless heat pump, or ductless air conditioner against the exterior wall. The support bracket is included with all necessary mounting hardware for a mini split system.

Things You'll Need

  • Measuring tape
  • Marker
  • Level
  • Drill
  • Masonry, or regular drill bit
  • Socket wrench set
  • Adjustable pliers
  • Put the plastic leveling screws into the indented holes at the rear of the wall mounting rails. Tighten the screws until the heads sink into the recesses.

  • Measure the distance between the mounting screw holes on the bottom of the condenser unit. The outdoor condenser for the ductless heat pump, or ductless air conditioner has four extension feet with holes for the mounting screws. Measure the distance between the front two mounting foot screw holes from center to center.

  • Mark the outside wall that will hold the bracket with the measurement taken from the front-mounting screw holes with a marker. Make two marks on the wall for the upper screws that will hold the vertical bracket wall mounts. Use a level to ensure the marks are horizontally level. Put a wall mount against the wall with the upper screw hole over the mark and hold the level against it to make it plumb. Make a mark through the bottom screw hole with the marker. Mark the other lower screw hole using the same process.

  • Drill holes for the vertical bracket wall mounts with a masonry bit if the wall is brick or cinder block. Use a normal drill bit for wood siding. Drill as deeply as the length of the mounting bolts and as wide as the bolts or plastic wall anchors. Push any plastic anchors included with the bracket into the holes.

  • Place the vertical wall mounts of the bracket over the holes. Put a washer on each of the lag bolts and insert them into the screw holes by hand. Secure the bolts firmly into the wall with a socket wrench.

  • Place the horizontal bracket supports into the lower end of the vertical wall mounts. Line up the bolt holes in the sides of the bracket sections. Place a washer on over a support bolt and push it through the holes to connect the two pieces. Put a washer over the end of the bolt and twist a nut on over that end. Secure the bolt with a socket wrench and adjustable pliers. Secure the opposite horizontal mount in the same way. The bracket is ready to hold the condenser from the mini split system.

Tips & Warnings

  • Place the anti-vibration rubber washers between the mounting feet on the condenser and the horizontal support when securing the outside unit for the mini split system. Push the mounting screws through the feet, rubber washers and horizontal support screw holes and secure them with nuts using a socket wrench and adjustable pliers.
  • Use the plastic leveling screws installed in step 1 to adjust the horizontal supports if necessary.

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  • Photo Credit Klimaanlage image by Imagemaker from
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