COMMON AIR DUCT REPAIR QUESTIONS:
HOW DO LEAKS OCCUR?
Homes are not static systems, and conditions transform as houses age. Tape glue dries out and caulking erodes. Many systems have supply signs up in each area yet only one centrally situated return register for the entire house. When we close indoor doors for personal privacy, air because certain space cannot spurt to a return register unless there is one located in that very same area– however the supply register is still generating conditioned air. The provided air needs to go someplace, so air gets displaced any type of space readily available. On the other hand, adequate air is not going into the return air duct, so unconditioned air from the attic, cellar, garage, or crawl area gets sucked in through leaks, cracks, or gaps. This scenario can be prevented by having supply and return air ducts in each space, or by providing an air pathway in between the spaces as well as in the residence. Such a path can be developed by including vents in doors or wall surfaces, or by setting up a jumper duct or transfer air vent that attaches vents in the ceiling of each area. Additionally, keep furnishings free from obstructing air vents and return air vents. Anything that disrupts air circulation will certainly make the system less effective as well as potentially result in troubles.
WHERE DO YOU LOOK FOR LEAKAGES?
Major leaks can be found around joints at ductwork links, around the air trainer unit, and near vents. Search for holes, rips, and loosened joints. Every unsealed joint is likely a tiny leakage– even if a space is not visible. Make sure registers, as well as vents, are firmly attached. If your residence has a mechanical storage room, it should also be properly sealed to prevent adverse return-side air leakage. The return vents need to be kept free of debris.
HOW OFTEN SHOULD THE DUCT SYSTEM BE CHECKED FOR LEAKS?
Ductwork ought to be checked annually for leakages. Some utility businesses and energy raters provide power audits or diagnostic devices like blower-door, duct-blaster, as well as pressure-pan examinations to find leaks the homeowner cannot quickly see. The relationship between supply and return air ducts and air activity in the system is intricate. Sometimes a property owner, in dealing with one issue, may inadvertently produce another. Specialists can occasionally identify such potential troubles before they happen.
WHAT IS THE BEST WAY TO SEAL THE LEAKS?
It is best to have a certified A/C professional fix your system’s air duct leakages. Master Tech Service Corp is your local, trustworthy, HVAC contractor that will take wonderful care of you. Return duct leakages are difficult to find since the bigger return ducts run at a lower air pressure, as well as air is being drawn right into the system. And if you just repair the supply air duct leaks, much more unconditioned air may be drawn into the system. Supply-duct leakages are extra easily discovered since you can feel air burning out from the links or see neighboring insulation relocating.
Air duct leakages can be secured using mastic or acrylic-adhesive aluminum foil tape. Mastic adheres well to a lot of surface areas as well as gives an efficient long-lasting seal. Mastic alone might be made use of to secure cracks less than 1/4″ large. Aluminum foil tape carries a 20-year warranty if used correctly.
Any type of sealer needs to bring the Underwriters Laboratories rating (UL-181) specific for that certain kind of duct. The majority of duct makers now detail the closure items that they allow to be utilized with their ducts.
If you see the contractor bringing in duct tape, make certain they do not mean to utilize it on ducts. If they do, then work with someone else. In the past, many systems were sealed with a grey, rubber-adhesive, towel duct tape. This tape will ultimately disintegrate due to its short-lived rubber-based glue. If you see this kind of tape in an existing house, make sure to inspect all areas where it is connected to the ductwork. If your contractor insists on utilizing duct tape on the ductwork, use a various contractor.