NADCA, the ACR Standard, Aeroseal, MERV filters, UV lights and the EPA's actual guidance - the standards layer of the duct industry, explained without a sales agenda.
The EPA does not recommend duct cleaning on a routine schedule. It advises cleaning only when there is evidence: visible mold inside ducts, vermin inf…
Read the guide →NADCA is the trade association behind the duct-cleaning industry's main standard. Its ASCS credential requires an exam and continuing education, and m…
Read the guide →The ACR Standard is NADCA's published rulebook for assessing, cleaning, and restoring HVAC systems. Its core is source removal: physically dislodging …
Read the guide →Aeroseal is an aerosol duct-sealing method: the system is pressurized and atomized sealant particles find and close leaks from the inside, guided by a…
Read the guide →The two dominant cleaning approaches are negative-air systems, which put the whole duct under suction and agitate debris into a large collector, and r…
Read the guide →MERV rates how effectively a filter captures particles, on a scale where higher numbers trap smaller particles. The right filter, fitted snugly and ch…
Read the guide →UV lights installed in HVAC systems have reasonable support for one job: controlling microbial growth on the surfaces they directly and continuously i…
Read the guide →Home ducts are built from three main materials: flexible duct, rigid sheet metal, and fiberglass duct board. Each is constructed, cleaned, and damaged…
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