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For projects in South Africa
HVAC, plant and machine noise control in South Africa
Noise with a source. Almost every honest fix is at the machine, the duct or the plant room, and almost nothing useful happens by lining the far wall of the occupied space. Split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC.
- At source
- Enclosure, barrier or anti vibration mounts at the machine.
- In the path
- Duct lining, attenuators and lagging on the first run out of the plant.
- At the receiver
- Only after the first two, and only for what is left.
- Quote
- From a plan and a section, within 48 hours
01 / Start here
What you are buying, and what it fixes in South Africa
Noise with a source. Almost every honest fix is at the machine, the duct or the plant room, and almost nothing useful happens by lining the far wall of the occupied space.
Split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC.
Work reaching us from South Africa is mostly offices and corporate parks, generator and plant enclosures, retail, hotels, schools, hospitals.
- Generators are everywhere Standby generation runs regularly and sits close to occupied space and neighbours. Enclosure and mass, not absorption, is what solves it.
- A mature specification culture Consultants are involved and targets are written down. Send us the specification and we will say where our material sits against it.
- Durban is well served Frequent sailings from western India keep this route practical for container quantities and repeat orders.
- At source Enclosure, barrier or anti vibration mounts at the machine.
Full specification
Thickness, density, NRC by frequency, fire class, standard sizes and build-up detail for HVAC and plant noise control are on the main product page. This page covers what that means for a project in South Africa.
02 / The build-up
The build-up, layer by layer
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Layer 1
SoundBlanket mass loaded vinyl
A limp, high density sheet that adds mass to a partition, floor or duct without adding depth. In South Africa, split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC.
Duct and plant wrap. Membrane wrapped over the duct with a decoupling layer beneath, sealed at every lap.
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Layer 2
Wood wool acoustic panels
Wood fibre bound into a rigid board with an open texture. In South Africa, church buildings and community halls are large hard rooms carrying amplified music and speech at high level.
On a cavity. Mounted on battens with an air gap, which is where the low mid performance comes from.
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Layer 3
Acoustic foam and BassBloc
Open cell foam shapes for high frequency control, and BassBloc, a high density absorber built for the low mid range where ordinary foam does nothing. In South Africa, classrooms are hard walled with high ceilings and large class sizes, and school halls double as assembly and performance spaces.
Behind a fabric frame. Where the room has to look finished, absorber inside a frame rather than foam on show.
We would rather argue about the build-up at design stage than on site. See how we support architects.
03 / Local conditions
What the buildings in South Africa do to the specification
- Generators are everywhere
Standby generation runs regularly and sits close to occupied space and neighbours. Enclosure and mass, not absorption, is what solves it.
- A mature specification culture
Consultants are involved and targets are written down. Send us the specification and we will say where our material sits against it.
- Durban is well served
Frequent sailings from western India keep this route practical for container quantities and repeat orders.
- Brick and concrete construction
Walls carry mass, so the usual problems are hard live interiors and plant noise rather than speech through a wall.
- Plant and HVAC
Split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC.
04 / Room by room
Space by space, for South Africa briefs
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At source
Enclosure, barrier or anti vibration mounts at the machine. Standby generation runs regularly and sits close to occupied space and neighbours. Enclosure and mass, not absorption, is what solves it.
- SoundBlanket mass loaded vinyl, 2100 kg per cubic metre
- Soundproofing materials, 1800 x 900 x 20 mm, 100 kg per cubic metre, NRC 0.85
- Acoustic foam and BassBloc, 100 kg per cubic metre
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In the path
Duct lining, attenuators and lagging on the first run out of the plant. Consultants are involved and targets are written down. Send us the specification and we will say where our material sits against it.
- SoundBlanket mass loaded vinyl, STC 30, 5.25 kg per sq m
- Soundproofing materials, Mass, then decoupling, then cavity absorption, then sealing
- Acoustic foam and BassBloc, 100 to 500 Hz
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At the receiver
Only after the first two, and only for what is left. Frequent sailings from western India keep this route practical for container quantities and repeat orders.
- SoundBlanket mass loaded vinyl, STC 34, 8.4 kg per sq m
- Soundproofing materials, ASTM E90 for the barrier, ASTM C423 for the absorber
- Acoustic foam and BassBloc, 0.85
If the visual is fixed and the room still has to perform, that is a solvable problem and a conversation worth having early. See how we work with interior designers.
04 / Climate and durability
Durability in South Africa, before acoustics is discussed
South Africa is hot summers, mild winters and a distinct wet season, and that narrows the material list before acoustics is discussed.
PET felt handles the wet months without absorbing moisture or feeding mould. Timber and wood wool want a ventilated cavity and a stable indoor RH.
The failure we design against here is wet-season humidity behind linings.
If a consultant has set the target, we will quote against their figures rather than ours, and stay out of the scope they own. More on working with acoustic consultants.
06 / Worth knowing
Where this kind of project usually fails
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Absorption on the office wall for a plant room problem
Enclose the machine, break the vibration path, then deal with what is left. Doing it in the other order costs more and achieves less.
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Lagging a duct that is carrying the noise as breakout from the fan
Noise with a source is fixed at the source. Treating the receiving room is the expensive way to get a small result.
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Ignoring structure borne vibration through the mounts
It sounds like a small detail until the room is finished and the complaint arrives.
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Treating it as a generic South Africa job
Standby generation runs regularly and sits close to occupied space and neighbours. Enclosure and mass, not absorption, is what solves it.
05 / Route to site
Getting it to South Africa, with real dates
| Ships from | Palwal, Haryana, India |
|---|---|
| Arrives at | Durban, then road inland |
| Dispatch | 4 to 7 working days |
| Freight | Sea via Durban |
| Support | Drawings, build-ups, BOQ and material that arrives complete |
Standard items dispatch in 4 to 7 working days. Grooved panels and custom colours take longer, and we say so before you order, not after.
Sea freight into Durban, then road inland. Air freight for samples and urgent quantities.
Questions from South Africa projects
What makes HVAC, plant and machine noise control different in South Africa?
Split units and generator sets, with backup generation running often enough that its enclosure matters as much as the HVAC. Standby generation runs regularly and sits close to occupied space and neighbours. Enclosure and mass, not absorption, is what solves it.
Where should the budget go first on a South Africa project?
At source. Enclosure, barrier or anti vibration mounts at the machine. In the path. Duct lining, attenuators and lagging on the first run out of the plant.
Do you have an office or installation team in South Africa?
No. We manufacture in India and supply into South Africa. We give you drawings, build-ups, a BOQ and material that arrives complete, and we will tell you plainly when a job needs a local contractor we cannot be.
How does material get to a South Africa site?
ships from: Palwal, Haryana, India, arrives at: Durban, then road inland, dispatch: 4 to 7 working days. Standard items dispatch in 4 to 7 working days. Grooved panels and custom colours take longer, and we say so before you order, not after.
What goes wrong most often on this kind of project?
Absorption on the office wall for a plant room problem. Lagging a duct that is carrying the noise as breakout from the fan.
What do you need from us to quote?
A plan, a section through the critical partition or ceiling, and what the room is for. From that we can give a build-up and a BOQ rather than a price per square foot.
Next step
Drawings in, BOQ and a delivered date out
We quote from drawings, not from a square foot rate. Send a plan and the section through the critical wall or ceiling and you will get something you can actually build from.