Does the air-to-water heat pump's outdoor unit freeze in winter? Five simple tips

Your air-to-water heat pump's outdoor unit can withstand a lot. But when winter's wind, rain, ice and snow hit, it may need a little help. Here are five anti-freeze tips to winter-proof your heat pump.

If you take a little extra care of your air-to-water heat pump when there is a lot of snow, it will not just work well, but optimally.

1. Check the grilles

Check both the front and rear grilles on the heat pump's outdoor unit at regular intervals. Clean and make sure that there are no leaves or snow blocking the air supply. Be extra attentive after strong winds and heavy snowfall.

2. Remove snow and ice from the roof

Falling snow and ice may damage the heat pump's outdoor unit, so also make sure to remove the snow and ice from the roof if needed.

3. Remove snow from around the heat pump

Make sure that snow does not build up around the heat pump — it needs to be free to operate optimally. If there is a lot of snow, you may have to clear the area around the pump.

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4. Drain condensation and snow and ice melt to prevent freezing

When the snow melts and the ice thaws, a lot of condensation is produced — up to 50 litres per day. The easiest way to deal with water from the air-to-water heat pump's outdoor unit is by means of a drainage tray leading to the surface water drain.

If it is not possible to install a tray or if there is no drain, the water can be diverted in another manner to ensure that ice does not build up underneath the heat pump. If there is too much ice build-up, the pump may freeze and become damaged.

CTC Ecoair — Heat pump with automatic defrosting and condensation trough with heater

5. Divert water away from the house's foundations

Last but not least, make sure that the water is not diverted towards the house foundations, as this can cause moisture damage to the house.

Guide: All about heating systems and heat pumps

Published: 2022-11-30