In New Zealand, it’s not common practice to put a cover over the outdoor unit of an air conditioning or heat pump system.
These units are designed to withstand New Zealand’s diverse weather conditions, including rain, wind, and even frost.
However, there are some considerations:
When a Cover May Be Used:
Protection from Debris:
If the unit is located near trees, bushes, or areas prone to heavy debris (e.g., leaves, twigs), a cover or mesh guard might help prevent blockages.During Inactivity:
If the unit won’t be used for an extended period (e.g., over winter for a cooling-only system), a breathable cover can protect it from dirt buildup or bird nesting.
Risks of Covering:
- Restricted Airflow: Covers can block airflow, causing the unit to overheat or work inefficiently when in use.
- Moisture Trapping: Non-breathable covers can trap moisture, leading to rust or mildew.
- Pest Issues: Covers can sometimes attract insects or rodents looking for shelter.
Best Practices:
- Leave the outdoor unit uncovered for proper ventilation and drainage.
- Regularly clean the unit to remove debris and make sure it runs efficiently.
- If you want extra protection, use a purpose-made heat pump/air con cover designed for airflow and drainage.
For most homes in New Zealand, the outdoor unit doesn’t need a cover as long as it’s maintained and positioned in a sheltered but ventilated spot.