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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.
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