Mini-split & ductless cleaning
Ceiling cassette cleaning, without taking the ceiling apart
The four-way units above an office ceiling hold the same dust as any mini-split — they just hide it better. The panel comes down, a tent goes up, and the coil and blower are washed in place. $450 per cassette, $400 each additional.
Evenings and weekends on request — most offices book the wash outside working hours.
per cassette, flat
each additional, same visit
panel down to panel up
ceiling tiles removed
Air out of all four sides again
A cassette pulls room air up through its centre grille and pushes it back out of four slots. Block the coil behind that grille with five years of dust and the unit still runs — it just stops moving the room.
Cassettes are chosen for even throw. A clogged coil kills the throw first, which is why the far side of the room goes warm before anyone complains.
The pan under a cassette sits above people all day. What grows in it is what everyone underneath is breathing.
Cassettes drain uphill through a small pump. Silt from a dirty pan is what burns the pump out and puts water on the ceiling tile.
Supply and return temperature before and after, on the invoice — the same proof we leave on a wall unit.
What building managers ask first
A cassette sits over furniture, desks or a service counter. Every question below is about what happens underneath it.
“Do you have to drop the ceiling?”
No. The panel and filter come down on their own hinges, and everything after that happens through that opening. The tiles around it stay where they are.
“What lands on the floor?”
Nothing. A catch tent is taped to the ceiling around the opening and drains through a hose into a bucket. The floor under it is covered anyway.
“Can it be done outside business hours?”
Yes, and most are. A cassette is 90 minutes of noise directly above a workspace, so evenings and weekends are the normal booking, not a surcharge.
“Our super just changes the filters.”
Good — that is half the job and it should keep happening. The other half is the coil and the blower behind the filter, and no filter change reaches either.
How the ninety minutes go
Same order every time, because the order is what keeps the wash above the ceiling and off the desks below.
Panel and filter down
The centre grille hinges down on its safety cords and the filter comes out. The as-found reading is taken while the unit still runs.
Tent taped to the ceiling
A catch tent goes up around the opening and drains to a bucket. Furniture underneath is covered before anything is opened.
Coil, wheel and pan washed
Coil, blower wheel, drain pan and the swing louvers are washed with coil-safe cleaner until the runoff is clear. Filters washed or replaced.
Closed and re-measured
Panel back on, pump and drain checked under load, and the second reading goes on the invoice with the photos.
One number per cassette, settled before we come
Send a photo of the unit and the ceiling around it and we quote the whole job before anyone is booked. Access, height and after-hours work are already in the number.
$450
first cassette
Any four-way or one-way ceiling unit
$400
each cassette after that
Any number of them, same visit, same floor plan
What the number covers
- Panel, filter, coil, blower wheel, drain pan and louvers washed
- Condensate pump and drain line checked under load
- Before/after temperature reading, with the photos to keep
- Evening or weekend slot at no extra charge
We clean — we don’t sell repairs or replacement equipment. If a pump or a board is failing, we tell you and stop there.
What a cassette looks like with its panel down
Three frames from cassettes we have had open. Nothing here is staged and nothing is a stock photograph.
Panel down 
Inside 
Back together 4 sides
discharge slots, all measured
~90 min
per cassette, panel to panel
0
ceiling tiles disturbed
Photographs from our own visits, cropped and scaled and nothing else. The written-up jobs behind them are being logged now — figures and reviews land here as they are.
Ceiling cassette cleaning — FAQ
The questions every office manager asks before letting anyone up a ladder.
How often does a ceiling cassette need cleaning?
Once a year in an office, twice where there is a kitchen or a lot of foot traffic. Cassettes run more hours than wall units because nobody switches them off, and they collect what the whole room throws up at them.
Do you need access above the ceiling?
Usually not. The wash happens through the panel opening. If the drain pump or a valve has to come out, that needs a tile lifted, and we say so before booking rather than at the ladder.
Will it be noisy for the people below?
A wash pump running for twenty minutes directly overhead is noticeable, which is why most of these are booked in the evening. There is no extra charge for the slot.
What about the condensate pump?
Checked under load as part of the visit. A silted pan is the usual reason a pump fails, so cleaning the pan is also the cheapest way to keep water off your ceiling tile.
Can you do a whole floor?
Yes, and that is the cheaper way to buy it: the first cassette is $450 and each one after is $400 on the same visit, whether that is three or thirty.
Goes well with
What usually gets booked on the same visit as a cassette.
Ninety minutes, one flat price, and the ceiling stays where it is.
Send a photo of the unit and the ceiling around it — the quote comes back before anyone is booked.
Book a cassette clean