Aircon Installation: What to Expect on the Day

Expect a short site review first, followed by preparation of access paths and protection for floors and furniture. The installers will check room sizes, confirm unit locations for the indoor and outdoor components, run electrical wiring and refrigerant lines, and complete commissioning and performance tests. Allow several hours for a standard single-split system; larger multi-room installs take longer. Have clear access and any pets secured.

Technicians assess room layout, sun exposure, airflow needs and wall strength. The indoor evaporator goes where it can distribute cool air evenly without obstructions. The outdoor condenser needs firm level ground or a mounted bracket, good airflow, and access for servicing. Installers balance sound, vibration, refrigerant line length and energy efficiency when choosing locations.

Local climate, typical summer temperatures, and neighbourhood noise rules affect equipment choice and placement. Consider sun-facing walls, dust levels, and whether the property is in a high-density area where outdoor unit placement is restricted. Contractors familiar with Johannesburg will recommend systems sized for our heat and take into account local building regulations and access for service.

Assess floor area, ceiling height, insulation and window orientation. Single-room needs often suit split systems; larger or multi-zone spaces may need multi-split or ducted systems. A qualified contractor should perform a load calculation (cooling capacity in kW or BTU) rather than relying on rule-of-thumb sizing to avoid undersizing or wasted energy.

Clear furniture and create direct access to the installation area and outdoor unit location. Ensure there’s a safe power supply nearby and a place for installers to park. Remove wall hangings, blinds or obstructions where holes will be drilled. Confirm access permissions if you’re in a complex or have restricted outdoor spaces.

The installer verifies electrical supply, breaker capacity, earthing, and structural suitability for mounting. They check for hazards, mark drilling points, and agree the final unit positions with you. Safety protocols include isolating power, wearing PPE, and following refrigerant-handling regulations.

If removing an old unit, technicians will recover refrigerant using certified recovery equipment to prevent leaks and comply with environmental laws. They disconnect electrical supplies and safely remove indoor and outdoor components. Disposal or recycling follows local regulations and your contractor should confirm waste handling.

Certified technicians use recovery machines to capture refrigerant into approved cylinders, preventing atmospheric release. Proper recovery protects the environment, ensures legal compliance and allows safe disposal or reclaiming. Never attempt to release refrigerant yourself; it requires trained personnel and specific equipment.

A qualified electrician or a trained HVAC technician will isolate the circuit, install or upgrade the dedicated breaker, run power cabling to the outdoor unit and hardwire the indoor controller as required. They perform electrical safety checks and ensure correct earthing and overload protection before commissioning.

Installers mount the indoor unit on a secure bracket, ensure correct slope for drainage, connect refrigerant lines and condensate drain, and run low-voltage control wiring. They test for leaks, vacuum the lines if fitting a new system and check airflow and cooling distribution once powered.

The unit is placed on a level pad, anti-vibration mounts or wall brackets to reduce noise and movement. Technicians leave clearance for airflow and service access, secure it against theft where needed, and protect it from debris and sun. Proper levelling reduces compressor strain and extends lifespan.

Lines are measured to minimise length, brazed or flare-connected, insulated and routed through a neat pipe chase or hole with seals. Electrical wiring follows code with separate circuit protection. Installers pressure-test and vacuum the refrigerant lines before charging to check for leaks and moisture.

Technicians check refrigerant charge, measure temperature drop, verify airflow, test drain operation and run electrical safety checks. They confirm correct thermostat operation, listen for unusual noises and demonstrate system controls. A final inspection ensures no leaks, secure fixings and a working system.

Drainage route verification includes ensuring the condensate drain has a continuous fall, routing to an approved outlet or trap, and testing for water flow. They may install an insulated drain line, a condensate pump if gravity drainage isn’t possible, and fit a float switch to protect against overflow.

Checks include correct earthing, breaker sizing, wiring polarity, insulation resistance where applicable, and verifying that current draw is within manufacturer limits. Installers confirm isolation is accessible and labelling is clear. These checks protect the system and building wiring.

They measure supply and return temperatures, calculate temperature differentials, and use anemometers or manometers where needed. The team ensures vents are unobstructed, fan speeds are correct and the system reaches design cooling levels efficiently across the room.

Keep records of the written quote and the installer’s warranty terms. Regular servicing by a certified contractor preserves efficiency and warranty validity. Maintain clearances around outdoor units, clean filters regularly and address faults early to prevent costly repairs and protect warranty coverage.

Use the platform to request up to three written quotes (or up to five where available) from independent contractors who will size systems, outline parts and labour, and list warranty terms. Compare scope, unit brands, energy ratings, timelines and service inclusions to make an informed choice.

Confirm unit make and model, cooling capacity, exact scope of work, materials, electrical upgrades, refrigerant handling, labour warranty, service call terms and exclusions. Check pricing for parts and labour, access requirements and any additional fees for site conditions. Ensure start dates and expected completion times are included.

Causes include insufficient refrigerant charge, loose fittings, blocked condensate drains, poor airflow due to dirty filters or obstructed vents, incorrect unit sizing, or electrical faults. If you notice reduced cooling or sound of hissing, contact a qualified service technician promptly.

Expect some dust from drilling and brief relocation of furniture near the work area. Professional teams protect floors, seal holes and tidy work zones. Major duct or structural work creates more disruption; contractors should outline this in the quote so you can plan accordingly.