How often should the air filters in an office building's HVAC system be replaced or cleaned?
- Every 3 months
- BEvery 6 months
- CEvery 12 months
- DEvery 18 months
Exam tip
Regular maintenance is key to ensuring good indoor air quality and efficient operation of HVAC systems.
Why A is correct
The correct answer is every 3 months, as recommended in the ACCA Manual D. Regular filter maintenance is crucial for maintaining air quality and system efficiency. The other options are less frequent and may not maintain optimal air quality.
