Calculator: how often your unit should be cleaned
Manufacturer and ASHRAE recommendations translated for your unit: choose how you use it and who breathes the air.
Explanatory diagramMaintenance follows actual use
- Start with the manufacturer’s instructions.
- Consider operating hours, environment and observations.
- Plan checks and record completed work.
One fixed interval does not suit every unit and home.
Other tools
- Symptom test: does your unit need sanitising?
- Calculator: how much more a dirty unit uses
- Pre-season checklist
- Before and after: what comes out of the unit
The information on this page is educational and based on cited sources; it does not replace medical advice. We do not do repairs, installation or refrigerant circuit work.