Attention to Detail is Not Optional
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HVAC-System Cleaning
Job Prep
Our technicians set up drop cloths and canvas tarps in areas where work is to be performed. Next, they remove all registers and return grilles and clean the boot area and return plenum(s) by wire brushing, scraping, and/or vacuuming. The techs will also wash all registers and grilles with degreaser and set them out to air dry. Typically, one tech preps for duct cleaning and the other begins the cleaning process on the air-handling unit.
Air Handler
Our technician will remove blower for thorough cleaning. If needed, we will disassemble the blower and wash the fan and housing. If disassembly is not required, we air-wash the blower with a high-pressure nozzle.* Next, the technician will foam wash the evaporator coil with a high-alkaline chemical that pushes dirt out of the center of the coil to the surface, where it can be rinsed or vacuumed away. After rinsing the coil, the tech will wipe down the primary drain pan and make sure that the drain is clear. Finally, we contact-vacuum all insulation and clean all hard surfaces with degreaser. After duct cleaning, an EPA-registered sanitizer (usually Shockwave) is applied and allowed to dry by running the blower for fifteen to thirty minutes.
Return Ductwork
We connect the recovery unit to the return ductwork and clean the duct with an air-forced agitator to remove contaminants. We typically hand clean the plenum attached to the air handler on a split system.
Supply Ductwork
The technician will connect the recovery unit to the supply ductwork and clean the branch runs. We start from the vent boot areas inside the ceiling, wall, or floor and use the air agitator to move debris toward the trunk. After all inside runs are clean, we move to the attic or crawl-space where we access and clean the trunk by working back toward the recovery unit.
Duct Access & Restoration
All access-openings that are cut into the ductwork are repaired and sealed by NADCA standards. Our technicians never cut accesses into flex duct. We use metal patches, screws, and mastic tape to close any openings cut into metal ductwork. We also repair insulation with tape and staples and reseal the entire area with mastic.
Restoration & Cleanup
At Alliance Air Quality Services, Inc., we pride ourselves in being able to complete the job in your home or office and leave no evidence of our presence, other than cleaner air. The negative pressure process and the use of drop cloths controls almost all of the debris involved with the job, but the work typically produces a small amount of dust. After reinstalling registers and moving our equipment back to the truck, we will dust and vacuum our work areas and make sure that your home is left as clean—if not cleaner—as we found it.
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*When working on a gas furnace, we air-wash the heat exchanger during the duct-cleaning process, using the recovery air from the return or supply side, depending on furnace style.