November/December

1. Clean or replace furnace filter.

2. Check and clean mechanical ventilation system (HRV/ERV). Check your manual and follow manufacturer’s recommendations.

3. Check exhaust fans.

4. Clear air intakes, exhausts and meters of snow, debris, etc.

5. Remove excess snow from roof to prevent ice dams.

6. Check adjustment of door thresholds.

7. Observe humidity levels and adjust the setting on the humidistat or air exchanger controller as needed to eliminate condensation or frost on windows.