Is there a plant room?
Water Cooled Aircon South Africa reject heat to water rather than to air, which is what large buildings do once air cooled plant stops being practical. It means a plant room, a chiller or a cooling tower and a water loop, and it is a mechanical installation rather than a unit purchase.
Describe the building and get water cooled quotes.
Get the Best QuoteWhat the System Is Made Of
- A chiller. Producing chilled water, air cooled or water cooled itself.
- A cooling tower. Where a water cooled chiller rejects its heat.
- Pumps. Primary and sometimes secondary, moving water round the loop.
- Pipework. Insulated flow and return risers through the building.
- Fan coil units. Or air handling units, cooling the air at each zone.
- Controls. Sequencing the plant so it does not all run at once.
Where It Is the Right Answer
- Large buildings. Hospitals, hotels, malls and multi-storey offices.
- Very long pipe runs. Water carries heat further than refrigerant does.
- High loads. Where air cooled plant would need an impractical footprint.
- Process cooling. Industrial loads running continuously.
- Plant room available. Space, access, drainage and power in one place.
- Long horizons. The economics work over decades, not seasons.
What It Asks of You Afterwards
- Water treatment. Dosing and testing, or the loop scales and corrodes.
- Legionella control. A cooling tower carries a duty of care, in writing.
- Make-up water. A tower evaporates water and it has to be replaced.
- Specialist maintenance. Chiller work is not general aircon work.
- Standby arrangements. What happens when a chiller goes down in February.
- Record keeping. Logs for the plant, the water and the refrigerant.
Water Cooled Aircon Prices
Ballpark water cooled figures so you can check a quotation.
| Item | Ballpark price |
|---|---|
| Small chilled water plant, installed | R650,000 - R1,600,000 |
| Medium chilled water plant, installed | R1,500,000 - R4,500,000 |
| Cooling tower, supplied and installed | R180,000 - R850,000 |
| Fan coil unit, supplied and installed | R18,000 - R55,000 |
| Chilled water pipework, per metre installed | R900 - R3,500 |
| Water treatment, annual programme | R18,000 - R85,000 |
| Chiller service, per visit | R8,000 - R35,000 |
| Design and engineering | R45,000 - R350,000 |
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 a plant price for your own building rather than a range.
Get the Best QuoteWhat Affects the Price
- Plant capacity. In kilowatts of cooling, from the load calculation.
- Chiller type. Air cooled, water cooled, screw, scroll or centrifugal.
- Pipework distances. Risers and horizontal runs through the building.
- Plant room works. Structural, electrical, drainage and acoustic.
- Number of terminal units. Fan coils or air handling units served.
- Redundancy. Standby plant doubles some of the cost and buys uptime.
What to Include in Your Request
- The building. Size, floors, use and occupancy.
- The cooling load. If it has been calculated, and by whom.
- Existing plant. Age, type and whether it stays in service during works.
- Plant room. Whether one exists, and its access and services.
- Riser routes. Whether vertical pipe routes are available.
- Uptime requirements. Whether the building can ever be without cooling.
Before the HVAC Company Quotes
- Involve an engineer. At this scale the design should be independent of the supplier.
- Ask for life cycle cost. Capital, power, water and maintenance over twenty years.
- Settle water treatment early. It protects the asset you are about to buy.
- Ask about legionella duties. Who holds them and what the regime is.
- Plan the changeover. If the building cannot stop, that is a project in itself.
- Ask about spares and response. Chiller downtime is measured in days, not hours.
Water Cooled Aircon FAQs
What is water cooled air conditioning?
It is a system that rejects heat into water rather than directly into the air. In most installations a chiller cools water, that water is pumped through the building to fan coil or air handling units, and the heat is finally rejected either through a cooling tower or through an air cooled condenser. It is how large buildings are cooled.
Is it more efficient than air cooled?
At scale, usually yes, particularly a water cooled chiller with a cooling tower. The gains come with obligations though: water treatment, make-up water, tower maintenance and legionella control. The right comparison is life cycle cost over the life of the plant rather than efficiency on a datasheet.
What maintenance does it need?
Specialist planned maintenance on the chiller and pumps, a water treatment programme with regular dosing and testing, tower cleaning and disinfection, and filter and coil work on every terminal unit. It is a plant room, and it needs to be run like one rather than visited when something fails.
Does a cooling tower carry health obligations?
Yes. A wet cooling tower is a recognised legionella risk and carries a duty of care that includes a written control scheme, regular testing and records. It is manageable and routine, but it is an obligation that comes with the system and it should be understood before the system is chosen.
Can an existing building be converted to chilled water?
Sometimes, and it is a major project. It needs riser routes for pipework, a plant room with structure, power and drainage, and a phased changeover if the building cannot be emptied. It is normally considered during a major refurbishment rather than on its own.
Water cooled plant is one of the types providers listed on Aircon Hub quote for, alongside VRV systems and rooftop package units.
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