The best-rated HVAC serving St. George, UT, independently researched and ranked on rating, review volume and genuine local reputation.
The best HVAC companies in St. George, UT are Thompson Plumbing, Heating, Cooling & Electrical, Quality Air Service, RightTemp Heating & Cooling, S&S Mechanical - Plumbing Heating Cooling and Best HVAC Inc.. Each is an independently researched local operator, ranked on reputation, reviews and genuine local presence, and none paid to appear.
One business can feature above the Top 5 on this page, clearly labeled. A great way for a newer or smaller pro to get seen first.
One of the most-reviewed in St. George, with 2,019 reviews behind it.
Consistently top-rated with 172 reviews, right in St. George.
Consistently top-rated with 1,680 reviews, right in St. George.
Consistently top-rated with 1,313 reviews, serving St. George from Ivins.
The best HVAC companies serving St. George, UT are based in and around Washington, St. George and Ivins. With the Mountain West's hard winters and big temperature swings to contend with, heating and cooling systems work hard for most of the year, so a proven local pro makes all the difference, and we've done the legwork to surface only the operators worth calling.
Thompson Plumbing, Heating, Cooling & Electrical currently tops the list, but every business here earns its place the same way: we research each HVAC company genuinely operating near St. George, weigh real customer reviews and ratings from sources like Google and the Better Business Bureau, and rank on merit. No business can pay into this list, the single featured spot above it is the only paid placement, and it's always clearly labeled.
| Business | Best for |
|---|---|
| 1. Thompson Plumbing, Heating, Cooling & Electrical | One of the most-reviewed in St. George, with 2,019 reviews behind it. |
| 2. Quality Air Service | Consistently top-rated with 251 reviews, right in St. George. |
| 3. RightTemp Heating & Cooling | Consistently top-rated with 172 reviews, right in St. George. |
| 4. S&S Mechanical - Plumbing Heating Cooling | Consistently top-rated with 1,680 reviews, right in St. George. |
| 5. Best HVAC Inc. | Consistently top-rated with 1,313 reviews, serving St. George from Ivins. |
Our current top picks are Thompson Plumbing, Heating, Cooling & Electrical, Quality Air Service, RightTemp Heating & Cooling, S&S Mechanical - Plumbing Heating Cooling and Best HVAC Inc., ranked #1 to #5 on reputation and review volume. This list was last updated July 2026. Every business is independently researched and ranked on merit, never paid placement.
We research every HVAC company genuinely operating in and around St. George, then weigh real customer reviews and ratings from sources like Google and the Better Business Bureau, review volume, and a genuine local track record. No business can pay to appear in the ranked Top 5.
No. The ranked Top 5 is editorial and cannot be bought. The only paid option is the single featured spot above the list, which is always clearly labeled as featured.
Start with Thompson Plumbing, Heating, Cooling & Electrical, our current #1 pick, then get written quotes from two or three on this list, read their most recent reviews, and confirm they cover your part of St. George. A good HVAC company responds promptly, explains the work clearly, and is upfront about pricing.
We rank on independent reputation and reviews, not licensing checks. Requirements vary by state and trade, so always confirm a pro's current license and insurance directly with them before any work begins.
Not sure what to ask or what a fair process looks like? Read our guide: Emergency HVAC Repair: When It Is Worth the Extra Cost (and When It Can Wait).
Own the featured spot above this Top 5, clearly labeled. A great way for a newer or smaller pro to get seen first. $39/month.