HVAC in St George, Utah: Best Heating & AC Companies

What is the best HVAC company in St George, Utah?

SGWOM lists 21 heating and air conditioning companies in Southern Utah, and 19 of them serve St. George. We do not name one best company: the right choice depends on your system, your home and the job. 8 of them state 24/7 service and 6 also do plumbing. Compare them in the table below on services, service area, hours, emergency availability and published Utah license number, then check the license on the Utah DOPL lookup and get written quotes from two or three before you hire.

Cox Climate Control is an SGWOM sponsor and is listed first; the rest follow in directory order, not by review score. 16 of the 21 companies are based in St. George, 2 in Hurricane and 1 in Cedar City. Need a plumber too? See the St. George plumbers comparison.

St. George HVAC companies compared

Each row comes from the company's SGWOM listing, which is built from its own website. A dash means the company does not publish that detail in its listing, not that it lacks it, so ask when you call. 4 of the 21 publish a Utah contractor license number; look up the rest on the Utah DOPL license lookup.

Emergency: “24/7” means the listing states round-the-clock service; “Yes” means it lists emergency repair without stating hours. Hours are office hours as published by the company.

AC Repair and Air Conditioning Service in St George

Air conditioner repair is the busiest HVAC work in St George. Average highs pass 96°F in June and peak at 101.6°F in July, so a unit that limps through spring often fails in the first long heat wave. The companies listed above handle AC repair, air conditioning service and tune-ups, refrigerant leaks, failed capacitors and compressors, and replacement of central air, heat pump and mini-split systems. 8 of them state 24/7 service; ask about the after-hours fee before you book.

Before the heat arrives, a spring air conditioning service (coil cleaning, refrigerant check, electrical test, filter change) is the cheapest way to avoid an emergency repair. For car air conditioning, see the separate auto A/C repair guide.

Furnace Repair and Heating in St George

St George winters are short, but average lows sit below freezing from December through February (26.1°F, 26.0°F and 30.7°F), so furnace repair, heating service and heat pump maintenance matter too. The same contractors service gas furnaces, electric furnaces and heat pumps, replace igniters, blowers and thermostats, and install dual-fuel systems that pair a heat pump with gas backup for the coldest nights.

Schedule a fall heating tune-up before the first cold snap; a carbon monoxide check should be part of any gas furnace service.

When St. George and Cedar City need heating and cooling

The two ends of the service area have different HVAC years. St. George runs a long cooling season and a short, mild heating season; Cedar City, higher up in Iron County, averages roughly 7 to 13 degrees cooler, depending on the month, and leans on its furnaces and heat pumps. These are long-term monthly averages from the Western Regional Climate Center.

An HVAC calendar for St. George homeowners

• March to May: book the air conditioning tune-up while companies are between seasons. Problems found now can wait for parts without leaving the house hot.
• June to September: cooling season, with average highs from 92.6°F to 101.6°F. Demand peaks in July and August, when emergency no-cooling calls take priority, so non-urgent repairs and new installations can take longer to schedule. Ask for the earliest date in writing.
• October and November: the quiet window. If a system struggled all summer, this is the time to get replacement quotes and a heating check before nights drop toward freezing.
• December to February: heating season. Heat pumps run in their heating mode and furnaces see their only real workload; in Cedar City, January lows average 17.2°F.

Source: Western Regional Climate Center monthly climate summaries for St. George (427516) and Cedar City Municipal Airport (421267).

How much does HVAC repair cost in St. George, Utah?

SGWOM listings do not include prices, and HVAC repair costs in St. George vary by problem, system type and company. Expect a diagnostic or trip fee, a higher rate for after-hours and weekend calls, and a quote for any part or refrigerant. Get a written, itemized estimate before work begins and compare at least two companies on larger jobs.

• Diagnostic or trip fee: Most companies charge to send a technician and diagnose the problem. Ask whether the fee is credited toward the repair if you go ahead.
• When you call: Night, weekend and holiday calls in July and August cost more than a scheduled weekday visit. If the house is safe for a day, a next-business-day appointment is usually the cheaper option.
• The part and the system: A capacitor, contactor or igniter is a small part. A compressor, coil or heat exchanger on an older system often leads to a repair-or-replace conversation. Ask the technician to put both options in writing.
• Replacement scope: For a new system, the price depends on equipment size and efficiency, ductwork changes, electrical work, any required permit and removal of the old unit. Itemized quotes make companies comparable.

How do I choose an HVAC company in St George, Utah?

Choose an HVAC company in St George, Utah by confirming it is licensed and insured, services your type of system, and offers repair for both air conditioning and heating. Compare reviews, ask about emergency availability during summer heat, and request a written estimate before work begins. Contact several local companies listed here to compare.

Use these checks to narrow the list to two or three contractors worth calling for a quote:

• Utah license: Confirm the contractor holds an active Utah DOPL license and carries insurance. The table above shows the license number where the company publishes one.
• Review volume and recency: A steady stream of recent reviews on Google or other platforms counts for more than a high score from years ago.
• Desert-climate cooling experience: Look for a team that regularly services systems running hard through St. George summers.
• Emergency availability: Ask how quickly they can respond to an AC failure, whether they take after-hours and weekend calls, and what the after-hours fee is.
• Warranty: Ask what warranty covers parts and labor, and get the terms in writing.
• Pricing transparency: Get a written, itemized estimate before any repair or installation begins, not a verbal number over the phone.

What to compare before you hire in St George, UT

• Cooling capacity for 100°F summers: July highs in St. George average 101.6°F. Ask for a Manual J load calculation rather than a system sized on square footage alone.
• Heat pump versus furnace: Winters are mild, so a heat pump can handle most heating days. A gas furnace or a dual-fuel system adds backup for the coldest nights. Ask each contractor to price both options.
• Quote requirements: Each written quote should list the equipment brand and model, efficiency rating, labor, any permit, removal of the old unit, and warranty. Collect at least three so you can compare like for like.

HVAC companies serving Hurricane, Washington, Ivins and Cedar City

Most Southern Utah HVAC companies are based in St. George and drive out to the surrounding towns. This is how many of the 21 listed companies include each town in their service area; Dutton Air Care and JM Mechanical are based in Hurricane, and 17 companies in all serve Hurricane.

Use the Location filter in the listings above to see the companies for one town.

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