Is there a ceiling void?
Underceiling Aircon South Africa mounts on the surface of the ceiling rather than inside it, which makes it the answer where a concrete slab leaves no void for a cassette. It throws air a long way down a room, so it suits halls, workshops, classrooms and long open spaces.
Describe the space and get underceiling quotes.
Get the Best QuoteWhere Underceiling Units Win
- No void needed. Mounted on a slab or a beam, not inside a ceiling.
- Long throw. The air travels the length of a hall rather than dropping.
- Large capacities. Common from 24000 BTU upwards.
- Simple access. Filters and coil reachable from a ladder.
- Cheaper than ducting. No ductwork, no diffusers, no balancing.
- Retrofit friendly. Goes into a finished building without opening ceilings.
Typical Spaces
- Church halls. Long rooms with high slab ceilings and no void.
- Classrooms. Where a wall unit cannot reach the back row.
- Workshops. High ceilings and no appetite for ductwork.
- Restaurants. Along a wall above head height, out of the way.
- Shops. Throwing air down the length of the floor.
- Offices in older buildings. Where the slab is the ceiling.
Things to Settle First
- Mounting. It hangs from the structure, and the fixings matter.
- Head height. The unit projects into the room; check it clears everything.
- Throw direction. Pointed down the room, not at the nearest wall.
- Drain route. Gravity if the fall exists, a pump if it does not.
- Noise. Closer to people than a cassette, so the rating matters.
- Looks. It is visible. Position it deliberately rather than conveniently.
Underceiling Aircon Prices
Ballpark underceiling figures so you can check a quotation.
| Item | Ballpark price |
|---|---|
| 18000 BTU underceiling, supplied and installed | R20,000 - R32,000 |
| 24000 BTU underceiling, supplied and installed | R24,000 - R38,000 |
| 36000 BTU underceiling, supplied and installed | R34,000 - R55,000 |
| 48000 BTU underceiling, supplied and installed | R46,000 - R78,000 |
| 60000 BTU underceiling, supplied and installed | R58,000 - R95,000 |
| Structural mounting and brackets | R1,500 - R6,500 |
| Condensate pump, supplied and fitted | R1,800 - R4,500 |
| Underceiling unit service | R850 - R1,900 |
Prices JUST UPDATED. Ballpark figures, rounded, excluding VAT. They reflect typical South African aircon and refrigeration rates. They are not our prices or quotations, and no provider is bound by them. Confirm what each quotation includes, such as the unit capacity, the standard pipe run, the electrical work, making good and callout fees.
Get an installed price for your own space rather than a range.
Get the Best QuoteWhat Affects the Price
- Capacity. These are larger units and the range is wide.
- Mounting height. A high slab needs scaffolding or a tower.
- Fixings. Into concrete, steel or brick, and each is priced differently.
- Pipe run. Distance from the mounting point to the outdoor unit.
- Drainage. Gravity fall, or a pump and its pipe run.
- Access during work. Occupied halls and schools mean after-hours work.
What to Include in Your Request
- The ceiling. Concrete slab, steel structure or timber.
- The ceiling height. And whether there is a void at all.
- Room dimensions. Especially the length the air has to travel.
- What the room is used for. And how many people are usually in it.
- Where the outdoor unit can go. And the route between the two.
- When it can be installed. Term time, trading hours or after hours.
Before the Installer Quotes
- Check the fixing substrate. What the unit will actually hang from.
- Confirm head clearance. Under the unit and in front of the air throw.
- Ask about the drain. A pump is fine, but it should be in the quote.
- Ask about the noise rating. In a classroom it is not a detail.
- Compare against a cassette. If a void does exist, ask for both.
- Agree the install window. After hours costs more and disrupts less.
Underceiling Aircon FAQs
What is an underceiling aircon unit?
It is an indoor unit that mounts on the surface of the ceiling instead of being recessed into it, with the air blown out horizontally along the room. Because it needs no ceiling void it is the usual answer in buildings with concrete slab ceilings, and because it throws air a long way it suits long rooms that a wall unit cannot reach the end of.
Underceiling or cassette?
If you have a suspended ceiling with enough void, a cassette is tidier and distributes air more evenly across a square room. If you have a slab, or a long narrow room, an underceiling unit is both cheaper and better suited. The shape of the room matters as much as the ceiling: four-way throw suits square spaces, long throw suits long ones.
Can it go on a wall instead?
Some models can be mounted high on a wall, which gets the same long throw where there is nothing suitable overhead. It depends on the model and on what the wall is made of, so it is worth asking rather than assuming. The drain route usually decides it.
Are they noisy?
They sit lower and closer to people than a cassette does, so the same sound rating is more noticeable. In a classroom or a boardroom it is worth comparing published noise figures between models and sizing generously so the unit runs on low speed most of the time.
What capacity does a hall need?
Far more than a room of the same floor area, because halls are tall and the volume of air is what has to be cooled. They also fill with people, each of whom is a heat load. It is a case for a proper calculation rather than a rule of thumb, and often for two units rather than one very large one.
Underceiling units are one of the types providers listed on Aircon Hub quote for, alongside cassette, ducted and floor standing units.
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