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How to Maximize a Ductless Mini Split When It’s Cold Outside

Ductless mini splits deliver excellent heating and cooling comfort and efficiency if they are installed correctly for their intended purpose and regional climate. Read on to learn what you need to know for using a ductless mini split in cold weather.

Heating With Ductless Mini Splits

Ductless mini splits are air-source heat pumps or cooling-specific units. Northern regions in the U.S. may not be accustomed to using an air-source heat pump for home heating. This is due to the fact that winter temperatures are often too cold for heat pumps, which extract heat energy from air outside the home, and release the heat inside.

New ductless mini split heat pumps, however, are changing the rules, opinions and energy bills with sophisticated builds that can provide heating when temperatures dip down below zero. But, the mini split must be installed correctly to achieve maximum performance.

  • Tighten up your home: Reducing the heating load helps lower bills and boost comfort no matter the heating system you are using. With heat pumps, tightening up the home by sealing air leaks and adding insulation is especially important.
  • Get the right size system: One of the reasons ductless mini splits offer great efficiency is that they are sized specifically for the zone they are installed. Make sure your certified ductless system contractor uses industry best practices for load calculations and ductless system sizing and selection.
  • Installing the outdoor unit: Protect the outdoor unit from ice and snow accumulation. The outdoor cabinets may be mounted to the exterior wall well clear of the ground. An overhang or other protective structure may be required.
  • Installing the indoor unit: Ductless mini splits often offer airflow enhancements for the indoor air-handling unit (AHU) to help circulate heated air evenly and efficiently through the zone. The AHU may be mounted on a smooth surface, such as a wall or ceiling. However, a floor-mounted AHU may offer better heating airflow.

Using a ductless mini split in cold weather takes good planning and the right contractor. For best results, please contact us to find a certified Mitsubishi Electric Contractor in your region.

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