One of the last places people look for contamination are the areas hidden to the naked eye. Common areas that require specific attention are the HVAC systems and the attached ductwork. If left un-treated many of the issues that existed in the first place return after the premise has been otherwise cleared.
HVAC systems are evaluated in compliance with ASHRAE standards. Indoor Air-quality is essential and HVAC Decontamination contributes to the spread of microbial. Blue Team Restorations process in addressing the Decontamination is as follows:
- Investigate the point of origin to stop the spread of contamination (HVAC Specialist)
- Air Quality Sampling
- Place Air Filtration Units
- Develop a plan/ schedule with the client, to minimize any business interruption; thus keeping all occupants, residents and guests satisfied.
If the HVAC system was on while the fire, mold, and/or catastrophic loss occurred and continued to run thereafter. It is of great importance that this system be thoroughly cleaned so the smoke and soot contamination contained therein will not permeate (smoke odor and/or dust particulate) and recontaminate (particulate matter) the facility once the system is turned on again.
The HVAC/Mechanical systems will be addressed using the following methods, which includes, but is not limited to all interior components, housing, coils, drive system, duct runs, etc. Some methods may vary according to ease of access to the units. Bad air sponges will be temporarily installed in the system to aid in deodorization.
- Remove all return and supply air registers, install filter material.
- Vacuum all duct openings using HEPA-Vac.
- Clean inside ducts using Chemical Sponge or, if necessary, will use a wet cleaning method through register openings. In order to insure a complete cleaning may be necessary to access the duct lines via "keyhole" saw at or near bends in the ductwork. Vacuum thoroughly, then,with ULV Fogger, apply soot set resin adhesive in all directions.Repair accesses area either sheet metal or appropriates duct tape to cover opening.
- With ULV Fogger back seal all remaining duct lines with clear resin sealer.
- Remove and dispose of all filters.
- Detail clean mechanical units to include but not limited to, return and supply plenums, fans, heat exchangers and cooling coils using a high-strength degreaser or coil cleaner, rinse and deodorize.
- Blow all lines clear.