HVAC in Long Beach, Los Angeles

Replacement is a design job, not a swap. The right size comes from a load calculation (ACCA Manual J) based on the home's insulation, windows, orientation and ducts. It should not be copied from the old unit, which was often the wrong size. Oversized systems switch on and off too often, cool unevenly and fail early. Ducts matter as much as the equipment: leaky or undersized ducts waste much of what the system produces.

Replacing a system needs a mechanical permit from your city's building department; in the City of Los Angeles that is the Department of Building and Safety. For most system changeouts and for duct replacements over 25 feet, California's energy code also requires an independent field test by a certified rater (an ECC-Rater, formerly a HERS rater), which shows the ducts are sealed and, where the code calls for it, that the refrigerant charge is right.

If you are replacing a central system, ask about a heat pump. Los Angeles has a mild climate, and one unit both heats and cools. Two checks come first: whether the electrical panel has room for the new circuit, since a panel upgrade is a job of its own, and whether the existing ducts can carry the airflow a heat pump needs. Ductless mini-splits suit homes without ducts and additions. Rebate programs from the state and utilities change often; ask the contractor what is current and get it in writing.

Refrigerants are changing. Equipment built since 2025 uses R-454B or R-32 instead of R-410A, though R-410A systems built before then can still be sold from stock, and a failed outdoor unit on an existing R-410A system can still be replaced on its own. Ask which refrigerant a quoted system uses and what that means for parts and service later.

HVAC contractors hold the C-20 classification from the Contractors State License Board, and the law requires them to carry workers' compensation whether or not they have employees. Check the record at cslb.ca.gov for an active license, the bond and a workers' compensation policy rather than an exemption. Ask who will do the install, whether the company gets the permit, and whether the field test is included.

Maintenance is simple: change the filter on schedule, keep the outdoor unit clear, and have the system checked before the cooling season. A spring check finds weak capacitors, dirty coils and slow refrigerant leaks before a heat wave does.