Air Duct Repair in Cherry Hill, NJ

The technician follows the system from the furnace or air handler outward, looking at the joints where sections meet, the takeoffs where branches leave the trunk and the boots behind each register. Leaks leave evidence: dark streaks of dust along a seam, old cloth tape hanging loose, a collar with daylight around it, insulation wrap that has slid down and left bare metal in a cold space. A return that leaks inside a garage or a crawl space is given priority, because it pulls unconditioned air in on every cycle.

Seams and connections are sealed with duct mastic or with foil tape made for ductwork. ENERGY STAR's advice matches the trade's: use mastic or metal tape, and never ordinary duct tape, because it does not last. Runs that pass through an attic, a crawl space, an unfinished basement or a garage get their insulation restored after sealing, since a sealed duct that is still bare in a hot attic keeps losing cooling through its walls. Register boots are sealed to the floor or ceiling where the gap can be reached, since that joint leaks into the wall or joist bay behind the grille.

A plenum is a large sheet metal box, and a big flat panel flexes when the blower starts and stops, which is the boom or the pop you hear from the basement. The repair is usually to stiffen the panel with a cross-brace, and sometimes to add a dampener or liner so the metal stops ringing. Loose hangers, a trunk resting on a pipe, and a register boot vibrating against a joist make their own rattles and are fixed where they touch. If the noise began after a new furnace or a new return grille went in, that change is where the crew looks first.

Whistling points to air squeezing through a gap that is too small for it. A return grille sized too small for the system, a filter that is too dense for the grille it sits in, a damper nearly closed, or a gap around the edge of the grille will all whistle. The crew finds which one it is before changing anything, then opens the restriction, reseals the edge or resets the damper, and checks that the noise is gone with the system running.

Flexible duct works when it runs straight and supported, and fails when it is bent sharply, stepped on or left to droop between framing. In the attics of attached homes around Voorhees, Mount Laurel, Evesham and Maple Shade, storage boxes, later wiring work and summer attic heat are common causes. A kinked or flattened section is replaced rather than straightened, and the run is rehung on straps so it cannot sag back into a loop.

Metal runs fail at the joints. In a split-level, the supply that crosses the garage ceiling to the bedroom above is an early suspect, and it is checked for open joints and bare insulation before anything else in that wing. A branch that drops off its collar in the basement ceiling or the crawl space sends that room's air into the framing instead of the room, and the fix is to refit it, fasten it and seal it. Where a finished basement hides the trunk, the crew works through registers, an access panel or a small opening that is closed again afterward, and says where it needs to open before anything is cut.

Repair makes sense when the system is basically sound and the trouble is in a few places. When runs are undersized throughout, when an addition was never tied in properly, or when most of the flex in an attic has failed at once, patching one section after another costs more over time than new work, and the crew says so and explains why air duct installation is the better route. Growth found on a damp duct during a repair is a separate job for mold treatment and removal, and a dirty system is best cleaned before sealing, since mastic holds better on clean metal, so an air duct cleaning often comes first on the same visit.

Each repair is quoted free once the crew has seen the runs, and the results are checked room by room with the system running before the crew leaves. AMG Duct Cleaning Cherry Hill is veteran owned, licensed and insured under NJ HIC 13VH13654300; calls are taken 8 AM to 8 PM, Monday to Saturday. The crew repairs ductwork in Cherry Hill and across nearby parts of Camden County and Burlington County, including Pennsauken, Haddon Township, Voorhees and Maple Shade.