Knowing the AC installation process before it starts helps you plan and reduces surprises. A typical central AC installation takes 4–8 hours, though larger or ductless systems may take longer. Here’s what happens.
Step 1: Pre‑Installation Assessment. The contractor verifies the system size, inspects the existing ductwork, and confirms the installation location. For sizing, see AC sizing guide.
Step 2: Removal of Old System (If Applicable). The old AC unit and possibly the indoor coil are removed. Refrigerant is recovered according to EPA regulations.
Step 3: Install Indoor and Outdoor Units. The new evaporator coil is installed in the air handler or furnace. The outdoor condenser is placed on a level pad or brackets. Refrigerant lines and electrical wiring are connected.
Step 4: Ductwork and Drainage. The contractor inspects and may seal or modify ductwork. Condensate drain lines are connected.
Step 5: Vacuum and Charge. The system is evacuated and charged with the correct amount of refrigerant.
Step 6: Testing and Inspection. The contractor runs the system, checks airflow and temperature drop, and schedules a final inspection.
For the overall explanation, revisit what AC installation involves. For choosing the contractor, see how to choose a licensed AC contractor. For post‑installation care, see maintaining your new AC system. For insurance, see insurance coverage for new AC.
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