Duct Sealing

Duct sealing addresses the leakage a system has across its whole distribution network rather than one broken run. It is a comfort and humidity job first and an energy job second — which is the opposite of how it is usually sold, and the reason so many Florida homeowners are unimpressed by it when it is pitched purely as a saving.

Here is why humidity leads. On the return side, every unsealed joint, every gap at the air handler cabinet and every leaky return plenum pulls air from where it sits — usually an attic or a garage — and delivers it into the house. That air is hot and extremely humid, and the system then has to remove that moisture on top of the moisture the house itself generates. Seal the return side and the humidity complaint frequently improves before anything else does.

On the supply side, sealing keeps the air you paid to condition inside the ducts and delivers it to the room it was intended for, which is what fixes the far-bedroom complaint without touching the equipment. The work itself is unglamorous: mastic at every accessible joint, boots sealed to the ceiling or floor, plenum connections sealed, the air handler cabinet itself sealed, and the whole thing verified by measurement rather than assertion.