Whole-home fragrance through the supply plenum — and a straight answer about what it does and does not do.
01Before anything else
Nothing obliges you to buy this and nothing is wrong with your system if you don't. It is a comfort purchase, the way a nicer light fitting is. So before the price and before the method: here is when people are glad they did it, and just as usefully, when they are not.
Tick what you recognize
Ticked nothing? Then skip it, and spend nothing. If what you actually have is a smell you cannot place, fragrance is the wrong purchase twice over — it costs money and it hides the thing you need to find. Book the odor investigation instead.
This service
HVAC Scent Diffusion
Prices shown are starting estimates and may change with the condition, access, and scope we find on site. Only a written quote from an on-site visit is a price we commit to.
02What the standards say
Every claim on this page is measured against a named standard you can go and read. One of them declines to recommend this work at all — and it is in the list, not buried.
A product may only be sold as killing bacteria or viruses if the EPA has registered it for that use, and fragrance oil is not. We make no air-quality claim for this service. Where a genuine antimicrobial is indicated we use an EPA-registered, HVAC-labelled product and apply it per label — that is a different service on a different page.
Anything fitted into a supply plenum has to leave airflow unobstructed and the equipment listing intact. The unit sits downstream of the coil, the penetration is sealed, and what we fitted is written down so your HVAC contractor sees it at the next service rather than discovering it.
This is fragrance. It is not filtration, it is not disinfection, and it does not make anybody's air cleaner — if that is what you are after, the honest answer is a camera look and source removal, and we would rather sell you that.
What an EPA registration means03What is included
Printed here so you can hold anyone else’s quote against it — including ours.
Not included, on purpose: add-ons nobody has shown a reason for. Sanitizing, UV and filtration upgrades are offered only where the footage shows an indication — our technicians are not paid on what they sell.
04What it costs
Published, not quoted over the phone from a script. The number moves only with what we find on camera, and only before you have approved anything.
What moves the number
Number of runs · attic access · duct type · how much the system is carrying. A two-system two-story is not a compact ranch, and we would rather say so than quote you a figure that changes once we are through the door.
05How the visit runs
Blower type, plenum access and run layout decide whether this works at all and where the unit goes. If the ductwork is dirty we tell you to clean it before adding anything — fragrance over dust is dust that smells nice.
You smell the options on site rather than choosing from a list. We stay with oils formulated for ducted systems, and we will explain why a favourite essential oil is not going in the plenum.
The nebulizer goes downstream of the coil, the penetration is sealed, and the unit is set to run with the blower so it never dispenses into still ductwork.
Intensity and schedule are tuned while we are there, the controls are paired, and you get the unit model, the oil and the refill interval in writing — including for whoever services your HVAC.
06What you are left holding
Which is precisely why this trade has a trust problem, and why the job is not finished until you are holding proof of it.
The same runs, before and after. Not a stock gallery — your system, shot on the day.
Which runs were cleaned, what was found along the way, and anything we deliberately left alone.
If something we did needs doing again inside twelve months, it gets done again.
If any company — ours included — cannot show you the inside of your ducts after charging to clean them, ask why.
07Book it
Leave three fields, or call. We will tell you on the phone what your system likely needs — including, sometimes, that it needs nothing.
A preference, confirmed by a person — we do not hold a live calendar and will not pretend a slot is reserved until someone has said so.
Maybe not — and we'll be the ones to tell you. EPA guidance says duct cleaning is warranted in three situations: visible mold, vermin in the ducts, or significant dust and debris buildup. Not on a calendar, not automatically every few years. Our $99 camera inspection checks your system against those conditions and gives you a straight verdict with photos. A meaningful share of inspections end with 'not yet, re-check in a couple of years' — and that answer costs you $99, not $600.
Honestly: there is no good evidence that it does, and the EPA states plainly that duct cleaning has never been shown to prevent health problems. It genuinely helps when your system meets one of the EPA's three conditions — visible mold growth, vermin, or debris actually being released into your rooms — and a camera inspection tells you which. For a household with asthma or heavy seasonal allergies, the changes that reliably move indoor air are a filter matched to what your blower can pull, a return path that isn't starved, and sealing ducts that are pulling attic air into the house. We would rather point you at those than sell you a cleaning you don't need.
Only if something has actually loaded them, and the usual culprit is renovation. Drywall dust and jobsite debris land on the return side where a filter never reaches them, so a nursery remodel with the system running is a real case and the before-and-after footage shows it. If nothing has changed about the house, start with the $99 camera inspection — it often ends the conversation. And one hard rule regardless: no ozone-generating air cleaner near an infant. The EPA is clear those aren't effective at concentrations that are safe to breathe.
A full-system source-removal cleaning starts at $349, targeted supply-and-return work at $199, and a camera inspection at $99. Those are honest starting points, not bait: your exact quote is confirmed after we look at the system on camera and before any work begins, and it doesn't change mid-job. Add-ons like sanitizing ($149) or a UV light ($399) are offered only when the footage shows a real indication — our technicians don't earn commissions.
Three to five hours for a typical single-system home. The honest variables are the number of runs, attic access, duct type, and how much debris the system is carrying — a two-system two-story takes longer than a compact ranch. We'd rather quote you a real window than promise a ninety-minute miracle, because whole-home source removal physically cannot be done in ninety minutes. You'll get a specific time estimate with your quote, and the system is back on the moment we finish.
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