Key takeaways
- Most ducted heat pump filters sit behind a ceiling return-air grille.
- Turn the system off before removing the filter, then vacuum or wash it only as recommended.
- Filter cleaning helps airflow, but annual professional servicing is still recommended.
Unlike wall-mounted heat pumps, most ducted systems hide their filters behind a return-air grille in the ceiling. Because they are out of sight, they are often forgotten until airflow starts to drop.
Keeping the filter clean helps your system run more efficiently and improves indoor air quality.
Find the Return-Air Grille
Most homes have one large return-air grille, although larger systems may have more than one.
Your installer can show you its location if you are unsure.
Turn the System Off
Always switch the heat pump off before removing the filter.
This prevents dust being drawn into the system while you are cleaning it.
Clean the Filter
Most reusable filters can be cleaned by:
- Vacuuming loose dust.
- Washing with warm water and mild detergent if recommended.
- Allowing the filter to dry completely before reinstalling it.
Avoid harsh chemicals or high-pressure water.
How Often Should It Be Cleaned?
Check the filter every two to three months.
You may need to clean it more often if:
- You have pets.
- Renovations create dust.
- Someone in the home has allergies.
- The system runs most days.
When Is Professional Servicing Needed?
Cleaning the filter is only part of maintaining a ducted system.
Professional servicing also checks the indoor unit, refrigerant performance, electrical components, condensate drain and overall operation.
Frequently asked questions
Can a dirty filter increase power bills?
Yes. Restricted airflow forces the system to work harder.
Can I damage the filter?
Yes. Always handle it carefully and allow it to dry before reinstalling.
Does cleaning the filter replace servicing?
No. Annual professional servicing is still recommended.
How Often Should a Ducted Heat Pump Be Serviced?
Understand servicing and maintenance for ducted systems.
Read guide ->
Ducted Heat Pumps
Learn about ducted heating and cooling options for Auckland homes.
Read guide ->
How Often Should a Ducted Heat Pump Be Serviced?
Understand servicing and maintenance for ducted systems.
Read guide ->Need practical advice for your system?
Holmes Services helps Auckland homeowners and businesses with heat pumps, ventilation, refrigeration and indoor comfort issues.