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Technician checking duct temperatures. Carbon monoxide monitor at a furnace.

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Condensation in the Attic

It is not uncommon for HVAC equipment to be located in an attic. Generally, that attic is not a conditioned space, so humidity levels may be high. If high humidity is present, there is a great danger of having condensation from the A/C equipment. This can lead to insulation damage, collapse of ceiling drywall below, and mold.

To avoid these problems, it is important to maintain a vapor seal between the cold surfaces and the attic air. Do this by installing a vapor barrier on the outside of the duct and equipment insulation.

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