Does Air Duct Cleaning Actually Improve Indoor Air Quality?

The EPA's position on duct cleaning is famously hedge-y: "may help, may not." That isn't because duct cleaning is fake — it's because the industry has never agreed to ship measurable proof. Most companies hand you before/after photos and tell you to feel the difference. We don't think that's good enough.

What duct cleaning measurably changes

• Total airborne particulate count (often a 40-70% reduction immediately after cleaning)
• Allergen presence (dust mite, pet dander, cockroach proteins — drops are case-dependent)
• Mold spore count by genus (drops if mold was present pre-clean)
• Smell — usually noticeable in the first 24 hours if the system had buildup

What duct cleaning does NOT fix

• Active mold growth inside the home outside the duct system (that's remediation, not cleaning)
• VOC sources (off-gassing furniture, cleaning chemicals)
• Outdoor pollen entering through windows/doors
• A chronically dirty filter that wasn't replaced

Why we ship a 3rd-party IAQ Lab Report with every job

Before we touch anything, we collect a sealed indoor air sample. After the job, we collect another. Both samples are shipped to a Maryland-based independent IAQ lab. Within five business days you receive a branded PDF showing particulate, allergen, and mold spore counts side-by-side, plus a plain-English interpretation.

The lab is independent of us. They have no incentive to flatter our work. That's the point — if a cleaning didn't move the numbers, the report will say so. We'd rather have that conversation with you than rely on "feels cleaner."