Air Conditioning Guide for South African Homes & Businesses
Installation, servicing, repairs & energy efficiency
With South Africa's hot summers and cold highveld winters, a reliable air conditioning system is essential for comfort and productivity. This guide covers everything from choosing the right system to keeping it running efficiently for years.
Choosing the Right Air Conditioning System
The right AC system depends on your space size, budget, and usage patterns. Choosing incorrectly leads to poor performance and high running costs.
- Split units: Best for single rooms — quiet, efficient, and easy to install
- Multi-split systems: One outdoor unit serving multiple indoor units
- Ducted systems: Whole-home climate control — higher cost, invisible installation
- Cassette units: Ceiling-mounted, ideal for commercial spaces
- Portable units: No installation needed but less efficient
- Inverter technology: 30–50% more energy efficient than fixed-speed units
How to Calculate the Right AC Size
An undersized unit runs constantly without reaching target temperature. An oversized unit short-cycles, causing humidity problems and premature wear.
- General rule: 100W of cooling per square metre of floor space
- Add 10% for north-facing rooms with high sun exposure
- Add 600W for each person regularly in the space
- Subtract 10% for well-insulated rooms
- A 9,000 BTU (2.6kW) unit suits rooms up to 20m²
- A 24,000 BTU (7kW) unit suits rooms up to 60m²
AC Maintenance Schedule
Regular maintenance keeps your AC running efficiently, extends its lifespan, and prevents costly breakdowns during peak summer heat.
- Monthly: Clean or replace air filters — dirty filters reduce efficiency by 15%
- Every 3 months: Clean the indoor unit's evaporator coil
- Annually: Professional service including refrigerant check and coil cleaning
- Annually: Check electrical connections and capacitors
- Every 2–3 years: Check refrigerant levels — low gas indicates a leak
- Before summer: Full system check to ensure peak performance
Common AC Problems and Solutions
Most AC problems have identifiable causes. Understanding them helps you decide whether to call a technician or try a simple fix.
- Not cooling: Check thermostat settings, dirty filter, or low refrigerant
- Ice forming on unit: Restricted airflow or low refrigerant — turn off and call a technician
- Water leaking inside: Blocked condensate drain — can be cleared with a wet vacuum
- Strange noises: Loose parts, debris in fan, or failing bearings
- Bad smell: Mould in the unit — requires professional cleaning
- High electricity bills: Dirty coils, low refrigerant, or aging compressor
Frequently Asked Questions
How much does AC installation cost in South Africa?
A standard split unit installation (supply and install) costs R8,000–R20,000 depending on the unit size and brand. Installation only (for a supplied unit) typically costs R2,000–R4,000.
How often does an AC need re-gassing?
A properly functioning AC should not need re-gassing. If refrigerant is low, it indicates a leak that must be repaired first. Re-gassing without fixing the leak is a temporary solution.
Which AC brands do you service?
We service all major brands including Samsung, LG, Daikin, Midea, Carrier, Gree, Hisense, Bosch, and more. Our technicians are trained across all leading manufacturers.
Can you install AC in a rental property?
Yes, but you should get written permission from the landlord. We can install units with minimal structural impact and provide a certificate of compliance for the electrical work.
Need a Professional?
Our certified technicians are available across South Africa. Get a free, no-obligation quote today.
Get a Free Quote