AC Installation near you

The house usually picks the type rather than the homeowner. A home with a furnace and usable ducts is a candidate for a matched split system; a slab home with a rooftop or side-yard cabinet is already committed to packaged equipment; and a house that never had ducts will be quoted ductless heads instead of a duct system carved into finished ceilings.

Ratings on current equipment read SEER2 for seasonal cooling efficiency and EER2 for efficiency at a single hot design condition. Both come from DOE's appendix M1 test procedure, which took over from the older SEER and EER test on January 1, 2023 and runs the equipment against external static pressure closer to what a real duct system imposes. That is why a SEER2 figure looks lower than the SEER number on a unit built before the change: the machine did not get worse, the test got harder. The standards themselves live at 10 CFR 430.32(c)(5), and DOE has since amended the test procedure again, making the updated appendix M1 mandatory for product testing from July 7, 2025 and adopting SCORE and SHORE as future metrics that are not required until standards based on them exist.

The part that catches people out is that the minimum is regional. DOE splits the country three ways. The Southwest region is Arizona, California, Nevada and New Mexico. The Southeast region is Alabama, Arkansas, Delaware, Florida, Georgia, Hawaii, Kentucky, Louisiana, Maryland, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Virginia, the District of Columbia and the US territories. The North is everything not named. Southeast standards reach split-system air conditioners; Southwest standards reach split systems and single-package units alike.

How the rule bites differs by region too, and it lands on the installation rather than the factory. In the North the standard attaches to the date the unit was manufactured, so a legally built unit can sit in a warehouse and be installed later. In the Southeast and Southwest it attaches to the date of installation, which makes putting in an older low-efficiency unit the installer's violation. DOE takes reports of suspected violations, requests records, issues notices of violation, and can label a repeat offender a routine violator, after which manufacturers and distributors may not sell to them. If a southern quote is unusually cheap because of leftover stock, ask in writing whether the model meets the regional standard.

Sizing should come from the building, not from the label on the old condenser. ENERGY STAR tells homeowners the contractor should verify the right size using Manual J, a calculation of how much heating and cooling the house actually requires, and DOE's purchasing guidance is blunt that oversizing, improper charging and leaky ducts all cause efficiency losses. An oversized system satisfies the thermostat in short bursts, and because the coil never runs long enough to condense much moisture out of the air, the house ends up cold and clammy rather than comfortable. ENERGY STAR puts a number on the stakes: improper installation can cut system efficiency by up to 30 percent and may shorten the equipment's life.

Ducts decide whether any of that efficiency reaches the rooms. ENERGY STAR says sealing and insulating ducts can improve a heating and cooling system's efficiency by as much as 20 percent, and sometimes considerably more, with runs through attics, crawlspaces, unheated basements and garages the first place to look. Federal purchasing specifications point installers at the ANSI/ACCA HVAC Quality Installation Specification for exactly this reason: the commissioning steps are what turn rated efficiency into delivered efficiency.

Who may install cooling equipment is settled state by state, and in several states the license itself is graded by the size of the system, which is worth knowing before you compare quotes. California's Contractors State License Board issues the C-20 Warm-Air Heating, Ventilating and Air-Conditioning Contractor classification and publishes a license check tool. Texas licenses air conditioning and refrigeration contractors through the Department of Licensing and Regulation, where a Class A license covers any size unit and a Class B license is limited to cooling systems of 25 tons and under and heating systems of 1.5 million BTUs per hour and under, each carrying a single endorsement for environmental air conditioning, commercial refrigeration, or both combined, and each requiring commercial general liability insurance for as long as the license is active. Florida statute draws the same line differently: a class A air-conditioning contractor is unlimited, a class B contractor is capped at 25 tons of cooling and 500,000 Btu of heating in any one system, and a certified contractor may work statewide while a registered contractor may work only in the jurisdiction that registered them. Permits are usually a city matter on top of all that.

Refrigerant handling is the piece that is identical in every state. EPA's Section 608 rules require technicians who maintain, service, repair or dispose of equipment that could release refrigerants to be certified by passing an EPA-approved exam, in four categories: Type I for small appliances, Type II for high-pressure equipment such as a residential split system, Type III for low-pressure equipment, and Universal for all of them. Apprentices are exempt only while continuously supervised by a certified technician, and the certification itself does not expire. The same certification controls supply: only Section 608 certified technicians, or employers who give the wholesaler written verification of employing one, may buy refrigerant for stationary air conditioning equipment, and the wholesaler must keep invoices recording the purchaser's name, the date of sale and the quantity.

ENERGY STAR certification sits above the federal floor rather than at it. DOE's purchasing guidance for residential central air conditioners points buyers in hot-humid southeastern states at an ENERGY STAR level of 15.2 SEER2, while noting the best available models reach 23.5 SEER2, so there is a wide band between the legal minimum and the top of the market. Because most incentive programs key eligibility to the certified product lists, the label frequently decides whether a quote qualifies for anything at all.

Incentives arrive from three directions and none of them is automatic. Utility and state programs are the most local and the most changeable, so check your own electric or gas provider directly. The federal Energy Efficient Home Improvement Credit under section 25C applied to qualifying property placed in service on or after January 1, 2023, with the added condition from 2025 that the item be produced by a qualified manufacturer; the IRS states that the credit is not allowed for property placed in service after December 31, 2025, following Public Law 119-21 enacted on July 4, 2025, so confirm the current position with the IRS rather than with a sales brochure. DOE's Home Energy Rebates, funded federally but run by state and territory energy offices, are open in selected states only, and your State Energy Office is the office that can say whether yours is one of them.

Quotes for the same house diverge mostly on scope rather than on the box in the yard, so compare what each contractor proposes to do before comparing totals.

Manufacturer warranties on cooling equipment are commonly conditional. Many shorten substantially unless the system is registered within a window after installation, and most exclude damage traced to incorrect charge, inadequate airflow or an unlicensed installation, which is one more reason the commissioning numbers belong on the invoice. Labor is separate again: the manufacturer covers parts, the contractor covers the work of fitting them, and those two periods rarely match.

Keep a single folder with the signed proposal, the invoice showing model and serial numbers, the permit and inspection record, the registration confirmation, the startup readings and the manufacturer's literature. If the system is ever sold with the house, serviced by a different company, or considered for an incentive program that asks for documentation after the fact, that folder is what answers the questions.