Vacuum the vents, free the returns
Annual · typically September
Why it matters
Your heating and cooling system breathes through two sets of openings: supply registers that blow, and return grilles that inhale. The returns are the ones nobody thinks about — big grilles, usually a few per floor, quietly matting over with dust and pet hair, and routinely blocked by the furniture that "fit perfectly right there." Every square inch you take away from a return makes the blower pull harder, and the blower's strain becomes your utility bill and, eventually, its own repair.
In your climate the system never gets a long off-season — both halves of the year lean on the same airflow, which makes this annual pass worth protecting.
This card is also your armor against the duct-cleaning industry, so let's say it plainly: the EPA's position is that routine duct cleaning has not been shown to improve health or system efficiency. It's legitimate in three cases — post-renovation construction debris, vermin infestation, or visible mold growth inside the ducts. Absent those, the $400–$900 truck visit is buying you a before-and-after photo.
What skipping it costs
$150–$1,200
Blocked returns and furred-over registers don't break anything today — they just make the blower strain against them every hour it runs, which shows up as higher bills, weak rooms, and an earlier blower-motor funeral. Meanwhile the fear version of this card — 'your ducts are filthy, breathe at your own risk' — sells about a billion dollars of mostly unnecessary duct cleaning a year.
Two ways to get it done
Do it yourself
You'll need: Vacuum with brush attachment, Screwdriver (some return grilles), Damp rag.
- Walk every room and find every register and return. (Most homeowners genuinely don't know their return count — it's usually 1–3 big grilles per floor.)
- Vacuum each supply register with the brush attachment; pop them out if they lift free and wipe the visible duct mouth with a damp rag. What you can reach is the part that matters.
- Take the return grilles off (usually two screws) and vacuum the mat off the back side — this is where the real restriction lives. If there's a filter-behind-grille setup, swap it on your normal filter schedule.
- The furniture audit: nothing within 6 inches of a return, no rugs over floor registers, no beds or couches sealing supply vents shut. Closing vents in "unused rooms" also goes on the myth pile — modern systems are balanced for the whole house, and choking rooms raises duct pressure instead of saving money.
- With everything open and clean, note any room that's still noticeably weak — that's real diagnostic data for your next HVAC checkup, not a reason to call the duct-cleaning number on the flyer.
Hire it out
$100–$200National fair range — local labor moves this number.
The honest paid version of this work is an HVAC tech spending part of a maintenance visit on airflow — static-pressure reading, return-sizing sanity check, damper positions — which rides along at $100–$200. That's different work than a duct-cleaning truck, and better.
If you genuinely hit one of the three legitimate duct-cleaning cases: hire a NADCA-certified outfit, expect a real job to run $450–$1,000 and take hours with source-removal equipment (vacuum truck plus agitation, registers off), and treat anything drive-by at $99 as exactly what it looks like. And whatever happens, decline the sanitizer fog — the EPA cautions against spraying chemicals into ductwork, and "pine fresh" is not an air-quality metric.
Ask the tech
- Show me what you found IN my ducts — actual photos from my house, not a tablet stock image.
- Is the return sizing adequate for this system, or is the airflow problem structural?
- If you're recommending duct cleaning: which of the three legitimate reasons applies here — renovation debris, vermin, or visible mold growth?
Red flags you're being upsold
- The $99 'whole-house duct cleaning special' — the classic bait rate that becomes $600–$1,200 on-site through add-ons. The EPA's own guidance says routine duct cleaning has never been shown to prevent health problems or improve efficiency.
- 'Mold in your ducts' diagnosed from a photo you can't verify came from your house. Ask them to show you the location live, with the camera, while you watch.
- Sanitizing fog / fragrance treatments sprayed into ductwork as an upsell — you'll be breathing that; the EPA cautions against introducing chemicals into ducts, full stop.
Second opinion time: Any duct-cleaning or duct-mold quote over $500 — and get the second opinion from an HVAC company that does NOT sell duct cleaning.
The call
DIY — it's a vacuum and 45 minutes, and it does more for airflow than the $600 duct-cleaning truck. Duct cleaning itself is a skip unless you've got renovation debris, critters, or mold you can see.