Ventilation installation in Johannesburg covers moving air rather than cooling it: extracting stale, humid or contaminated air, and supplying fresh air to replace it. It solves problems air conditioning cannot, and in a lot of buildings it is the cheaper half of the answer.
Describe the space and what needs to be removed or supplied, and get ventilation quotes.
Get Ventilation QuotesVentilation Versus Air Conditioning
| Ventilation | Air conditioning | |
|---|---|---|
| Does | Replaces air, removes moisture, smells and heat | Removes heat and humidity from air in the space |
| Can achieve | Close to outside conditions, at best | A set point below outside conditions |
| Running cost | Low — fans only | Higher — refrigeration |
| Best for | Extraction, fresh air, smells, humidity, high-volume spaces | Holding a temperature in an occupied space |
Air conditioning a space with no ventilation recirculates the same air. It gets cold, and it gets stale. In sealed rooms with sustained occupancy, fresh air supply is a separate requirement and it is regularly omitted in fit-outs.
Common Applications
- Commercial kitchen extraction. Canopy, filters, ducting, fan and discharge, plus make-up air.
- Bathroom and shower extraction. Humidity and mould control in homes and guest houses.
- Basement and parking ventilation. Exhaust fumes and stagnant air.
- Warehouse and factory extraction. Removing high-level stratified heat.
- Fume and dust extraction. Workshops, laboratories and production processes.
- Fresh air supply. Sealed offices, boardrooms and meeting rooms.
- Plant and generator room ventilation. Heat rejection and combustion air.
Where Ventilation and Air Conditioning Work Together
A restaurant is the clearest case. The kitchen extracts hard; the dining room is cooled. Without deliberate make-up air, the extraction drags conditioned air out of the dining room and unconditioned air in through the front door, and the cooling never catches up. The two systems have to be designed against each other.
The same logic applies in offices with sealed facades, in gyms, in laundries and in any space where a process is removing air continuously.
Ventilation Prices in Johannesburg
| Scope | Indicative range | Notes |
|---|---|---|
| Domestic bathroom extraction | R2,500 – R8,500 | Fan, ducting and external grille |
| Inline extraction, multiple rooms | R12,000 – R38,000 | Shared fan and duct runs |
| Commercial kitchen canopy and extraction | R45,000 – R180,000 | Canopy, filters, duct, fan, discharge |
| Make-up air unit | R35,000 – R140,000 | Sized against the extraction rate |
| Basement or parking ventilation | R85,000 – R450,000 | Volume and fire requirements dependent |
| High-level warehouse extraction | R35,000 – R160,000 | Often the cheapest heat intervention |
| Fresh air supply to offices | R25,000 – R120,000 | Duct routes and filtration dependent |
| Fume or dust extraction | R45,000 – R320,000 | Process specific |
| Extract duct deep clean | R8,500 – R45,000 | Periodic, run length dependent |
Indicative Johannesburg ranges, not a quotation. Ventilation pricing follows air volume and duct route more than anything else. A short run to an external wall and a long run to a roof discharge are very different jobs.
Send the space and the requirement, and compare ventilation quotes.
Compare Ventilation QuotesFrequently Asked Questions
What is the difference between ventilation and air conditioning?
Ventilation replaces air in a space; air conditioning removes heat and humidity from it. Ventilation can get you close to outside conditions at low running cost, but it cannot hold a set point below them.
Do I need ventilation if I have air conditioning?
In a sealed, occupied space, usually yes. Air conditioning recirculates air rather than replacing it, so fresh air supply is a separate requirement in offices, boardrooms and meeting rooms.
How much does commercial kitchen extraction cost in Johannesburg?
A canopy and extraction system commonly runs R45,000 to R180,000 depending on the canopy size, the duct route and the discharge position. Make-up air is usually a separate and comparable line.
Can ventilation cool a warehouse?
It can remove the hot air that stratifies at high level and bring in cooler outside air, which solves a large part of the complaint at a fraction of the cost of refrigeration. It cannot take the space below outside temperature.
Does a bathroom extractor fan need to vent outside?
It should. Discharging into a roof space moves the moisture rather than removing it, which is a common cause of damp and mould appearing in ceilings.
Ventilation work is quoted through Aircon Installers Johannesburg alongside air conditioning.
Related Aircon Services
Aircon Installers Johannesburg is a free quote-matching service. We do not install, repair or service air conditioners ourselves. Every quote comes from a LEADERR APPROVED local contractor, and your contract is with the business you appoint. Assess each quote on its own merits before appointing anyone.
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Describe the space and what you need removed or supplied, and get ventilation quotes.
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