Supply Duct Inspections

Supply Duct Inspections
The supply duct cleanliness inspection should consider a
representative portion of supply system components
including, but not limited to, supply ducts, controls,
mixing/ control boxes, reheat coils and other internal
components.
3.2.3 Return Duct Inspections
The return duct cleanliness inspection should consider a
representative portion of return system components
including, but not limited to, return ducts, dampers,
return plenums, make-up air plenums and grilles.
3.3 Inspecting for Mold Contamination
It is highly recommended the HVAC system cleanliness
inspection include a preliminary determination of the
level of mold contamination (Condition 1, 2 or 3) and
other biological activity. The inspection should evaluate
the air-handling unit, humidifier and other representative
system components.
HVAC systems should be inspected at least twice
annually when they include supplemental humidification
or when they are located within a hot and humid climate