AC Installation - Central Air, Ductless & Heat Pump

Choosing the Right AC Installation for Your Home

Existing ductwork: homes with ductwork in good condition are strong candidates for central air installation. Homes without ductwork, or with ductwork too deteriorated to justify repair, are better served by ductless mini split installation.

Heating situation: homeowners replacing an aging furnace and air conditioner at the same time should seriously evaluate heat pump installation, which is one system for both, may qualify for IRA tax credits, and leaves one less piece of equipment to maintain.

Budget and efficiency priorities: high-efficiency systems at 16 SEER2 and above cost more upfront and deliver lower operating costs. Standard efficiency systems have a lower installation cost and higher monthly bills. The contractor calculates the payback period before recommending.

The AC Installation Process: What Actually Happens

Manual J load calculation: determines the correct system capacity before any equipment is selected. This is not optional. No reliable installation happens without it.

Duct assessment: existing ductwork is inspected for leakage, insulation, and sizing. A leaky duct system loses 20 to 30 percent of conditioned air before it reaches the living space.

Equipment selection: Carrier, Trane, Lennox, and Rheem systems are commonly specified. The right brand matters less than the right capacity and efficiency tier for the application.

Mechanical permit: required for all AC installations in California, and pulled before any installation work begins.

Installation and commissioning: equipment installed, refrigerant charged to specification, airflow balanced at registers, and thermostat programmed before the contractor leaves.

Title 24 inspection: California energy code compliance inspection completed and documented.

Central Air vs. Ductless Mini Split: How to Decide

Central air installation is the right choice when quality ductwork already exists and the home benefits from uniform cooling through a single distribution system. One outdoor unit, one air handler, and one thermostat. If the current system is failing rather than aging out, AC repair is usually the cheaper first step.

Ductless mini split installation is the right choice when ductwork is absent, when specific rooms need independent temperature control, or when a room addition cannot practically be connected to the existing central system. Ductless systems are also heat pumps, so the same unit that cools in summer heats in winter. For homeowners replacing baseboard heaters or wall heaters in homes without central ductwork, ductless is almost always the most cost-effective solution.

AC System Efficiency: What SEER2 Means and Why It Matters

All new AC installations must meet a minimum of 15 SEER2 under current California energy code. Systems at 16 to 18 SEER2 deliver meaningfully lower operating costs, particularly in Greater LA's climate where AC runs 5 to 6 months per year. A 17 SEER2 system typically pays back the efficiency premium in 4 to 6 years and keeps delivering savings for the remaining 10 to 14 years of system life. The contractor calculates the payback period before recommending an efficiency tier.