AC Replacement in Sacramento

When should you replace an air conditioner instead of repairing it?

Start thinking about replacement when the system is more than 10 years old, needs frequent repairs, or can't keep some rooms comfortable. Those are the signs the Department of Energy and ENERGY STAR list. This Old House says the best residential cooling systems usually last 12 to 15 years.

A big repair on an old system is the usual tipping point. This Old House suggests replacing when the age times the repair cost tops $5,000. Systems that use R-22 face higher refrigerant costs, because U.S. production and import of R-22 ended in 2020.

What does California require when you replace an AC?

California's 2025 Energy Code applies to permits filed on or after January 1, 2026. The California Energy Commission says installing a space-conditioning appliance requires a building permit, and replacing an existing system requires refrigerant recovery by a certified technician.

The 2025 compliance manual spells out what a replacement triggers:

• Duct sealing and testing when an air handler, outdoor unit, packaged unit, or coil is replaced. Ducts must test at 10% total leakage or less, or 7% leakage to the outside. If they can't, all accessible leaks must be sealed and verified with a smoke test.
• Third-party verification by an ECC-Rater (often still called a HERS rater). Ducts in a garage have a stricter 6% limit.
• Refrigerant charge verification on air conditioners in climate zones 2 and 8 through 15 (Sacramento is zone 12) and on heat pumps everywhere, along with a minimum airflow check of 300 cfm per ton for most systems.
• A digital setback thermostat whenever a refrigerant-containing part is added or replaced.
• Exceptions for duct systems under 40 feet, ducts already sealed and certified by a rater, and ducts containing asbestos.

Which refrigerant will a new AC use?

New home AC and heat pump systems are limited to refrigerants with a global warming potential of 700 or less under EPA rules. Options the EPA accepts for new home systems include A2L refrigerants such as R-454B and R-32, which carry safety conditions because they are mildly flammable.

There's one twist in 2026. A final rule the EPA issued in May 2026 removed the January 1, 2026 installation deadline for R-410A equipment manufactured or imported before January 1, 2025, so leftover R-410A inventory can still be installed until supply runs out. If a quote lists an R-410A system, ask whether it's new old stock and how future repairs will be handled.

What size AC does your home need?

Size should come from a load calculation, not the old unit's label. The Department of Energy says the rule of one ton per 400 to 500 square feet ignores climate and insulation, and recommends that contractors use ACCA Manual J. California's Energy Code also caps system size in replacements unless the installer verifies airflow of at least 350 cfm per ton.

For a 1,500-square-foot home, This Old House says a 2.5-ton system is typical. See our sizing guide for how to check a contractor's numbers.

Should you replace your AC with a heat pump?

It's worth pricing both. A heat pump cools like an AC and also heats, and SMUD lists rebates of $2,000 to $3,000 when a heat pump replaces gas heat. SMUD's rebate page lists heat pumps only, so a standard AC replacement doesn't qualify. The 2025 Energy Code does not force a switch: when heating is replaced, the prescriptive path allows either a gas furnace or a heat pump.

How do you compare AC replacement quotes?

Get at least two written quotes and compare these points line by line.

• A Manual J load calculation and the system size it supports.
• Exact model numbers for the outdoor unit, indoor coil, and furnace or air handler, plus SEER2 ratings.
• Refrigerant type (R-454B, R-32, or R-410A).
• Whether the price includes the permit, the rater's duct and refrigerant tests, and any duct sealing.
• Removal of the old unit and refrigerant recovery.
• A payment schedule that follows CSLB's rules: no more than 10% or $1,000 down, whichever is less.
• The contractor's C-20 license, checked on the CSLB website.

Frequently asked questions

Available across the Sacramento area

• Sacramento
• Elk Grove
• Roseville
• Folsom
• Citrus Heights
• Rancho Cordova
• Rocklin
• Lincoln
• Davis
• West Sacramento
• Woodland
• El Dorado Hills
• Carmichael
• Fair Oaks
• Orangevale
• Arden-Arcade
• Antelope
• North Highlands
• Granite Bay
• Gold River
• Rio Linda
• Galt
• Auburn
• Cameron Park
• Placerville
• Loomis