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HVAC

AC installation near you

Replacement and new installs, including load sizing.

Prepared by the TenBestFind Editorial TeamUpdated September 2026

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  • Part of

    HVAC

  • Companies offer it

    327

  • Cities covered

    8

  • Last checked

    September 2026

The work

What ac installation actually involves

Sized by calculation, not by the unit that was there before

A replacement is the moment to get the size right, and the right way to size it is a load calculation that accounts for the building: floor area, insulation, window area and orientation, air leakage, local climate. The wrong way is to read the label on the old unit and match it.

Oversizing is the common error and it feels like the safe one. An oversized system cools the air quickly, satisfies the thermostat and shuts off before it has removed the humidity, so the house ends up cold and clammy, and the equipment wears out from constant starting.

A proper load calculation has a name and a method, and any contractor doing this seriously will be willing to show you theirs. If the sizing conversation begins and ends with the tonnage of the old unit, that is worth noticing.

Efficiency

The efficiency rating is a laboratory number

A high-efficiency unit installed on leaky ducts, with the wrong charge, in a house that was never sealed, will not deliver what the label says. The rating describes the equipment under test conditions, not your house.

The installation variables, duct sealing, correct refrigerant charge, adequate airflow across the coil, move real-world performance more than the difference between two adjacent efficiency tiers.

That is why the money often goes further in sealing ducts and improving the envelope than in buying up a tier, and why two quotes for the same rated unit are not the same offer.

Failure points

Two things that go wrong

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  1. New outdoor unit, old indoor coil

    Ask: “Is the indoor coil being replaced to match, and is the pair AHRI matched?”

    Replacing only the condenser and keeping the existing indoor coil is cheaper and leaves you with a mismatched pair. The system will run, and it will not deliver its rated efficiency or capacity, and manufacturers frequently will not warrant it.

  2. The ductwork nobody costed

    Ask: “Have the ducts been assessed, and is any sealing or resizing in this price?”

    The ducts are usually older than the equipment and frequently the reason the old system struggled. A quote that covers the box and says nothing about duct sizing, sealing or the return air path is a quote for half the system.

Before you book ac installation

How we rank →

Six checks, in the order they save you the most. None of them takes longer than a phone call, and the first one is the reason two quotes for the same job can be a thousand apart.

  1. In-house or subcontracted

    Ask whether the crew doing this specific work is on their payroll. Plenty of companies list a service and hand it straight to somebody else, which is not wrong, but it changes who is answerable when something goes back.

  2. The licence for the parent trade

    Look the number up with the authority that issues it rather than reading the certificate they send you. What a licence covers, and whether one is needed at all, changes by state and province.

  3. Insurance, confirmed with the insurer

    A current certificate sent to you by the insurer, not a photocopy from the company. Ask for liability and, where crews are on site, workers' compensation.

  4. What the quote leaves out

    Removal, disposal, subfloor or substrate work, permits and making good afterwards are where two quotes on the same job separate. Ask for the exclusions in writing next to the inclusions.

  5. Two warranties, not one

    The manufacturer covers the material and the company covers the workmanship. Get the second in writing, with its length, and ask whether it transfers if you sell.

  6. How a change is priced

    Agree before the deposit how anything found on the way is priced and approved. The moment to settle that is while you are still choosing between companies, not on the day somebody lifts a floorboard.

Where we cover it

HVAC shortlists by city

Every shortlist →

A company offering ac installation appears in the published list for its own market. Each one names the editor who built it and the date they last checked it.

On the lists

Companies that list ac installation

Drawn from the profiles where this service is recorded, not from what a company advertises.

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HVAC guides

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Common questions about ac installation

Ask us something else →

  • Who handles ac installation?

    AC installation is handled by HVAC companies. Not every company in the trade takes this work on, so each ranking lists the services a company genuinely performs rather than everything it advertises.

  • What should I ask before booking ac installation?

    Ask what the quote includes and excludes, who is doing the work, whether a permit is needed and who is pulling it, and what the workmanship warranty covers. Get the answers in writing before anyone starts.

  • How do I compare quotes for this?

    Put them on one sheet line by line. Differences in price almost always turn out to be differences in scope, material grade or warranty length rather than margin.

  • Is ac installation priced separately from the rest of the job?

    Usually it is a line inside a larger quote rather than its own invoice, which is exactly why the exclusions matter. Ask for it itemised so you can compare that line between companies instead of comparing two totals.

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