tisdag 6 januari 2015

If duct cleaning

If duct cleaning is determined to be the best option:
1. Hire a duct cleaning contractor who is a member in good standing of the National Air Duct
Cleaning Association. Duct cleaning companies must meet strict requirements to become NADCA
members. Among those requirements, all NADCA Members must have certified Air System Cleaning
Specialists (ASCS) on staff, who have taken and passed the NADCA Certification Examination.
2. PROTECT building occupants during and after duct cleaning:
Place a filter over supply and return grills to capture dust when HVAC system is placed back into
service after cleaning.
Perform duct cleaning during hours when the building is unoccupied, such as nights and
Use containment barriers and proper ventilation equipment, such as “negative‐air” machines
equipped with high‐efficiency filters.
Avoid the use of biocides and sealants. Even EPA‐registered biocides may pose health risks,
including eye, nose, and skin irritation.
No biocides are currently EPA‐registered for use on fiberglass duct board or fiberglass‐lined
ducts. Both the EPA and NADCA recommend replacing wet or moldy fiberglass duct material.

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