Best HVAC Companies in Loudoun County

The ranking

The 22 HVAC companies with an office in Loudoun County, from the 71 heating, cooling and plumbing companies Northern Virginia reviews most on Google, each licensed in Virginia for HVAC. One point each: licensed in Virginia for both HVAC and plumbing · rated 4.9 or higher on Google · rated 4.0 or higher on Yelp, across at least 10 Yelp reviews · fewer than 1 in 100 of its Google reviews are 1 or 2 stars · posts prices for common jobs · posts its maintenance plan price · that plan covers heating, cooling and plumbing · locally owned. Ties go to the higher Google rating, then more Google reviews. The Yelp 4.0+, Under 1% bad reviews and Whole-house plan checks were added October 19, 2026, read the same way for every company.

1. 1SwiftPro Heating, Cooling & PlumbingChantilly · Google 5.0 from 884 · Yelp 4.4 from 55✓ HVAC + plumbing license✓ Google 4.9+✓ Yelp 4.0+✓ Under 1% bad reviews✓ Posts prices✓ Posts plan price✓ Whole-house plan✓ Locally owned8/8
2. 2Cardinal Plumbing, Heating & AirSterling · Google 4.9 from 5,220 · Yelp 4.2 from 299✓ HVAC + plumbing license✓ Google 4.9+✓ Yelp 4.0+✗ Under 1% bad reviews✓ Posts prices✓ Posts plan price✓ Whole-house plan✓ Locally owned7/8
3. 3Meade's Heating and AirSterling · Google 5.0 from 2,650 · Yelp 4.7 from 69✗ HVAC + plumbing license✓ Google 4.9+✓ Yelp 4.0+✓ Under 1% bad reviews✓ Posts prices✓ Posts plan price✗ Whole-house plan✓ Locally owned6/8
4. 4Air Treatment Heating & CoolingSterling · Google 5.0 from 1,023 · Yelp 4.7 from 65✗ HVAC + plumbing license✓ Google 4.9+✓ Yelp 4.0+✓ Under 1% bad reviews✓ Posts prices✓ Posts plan price✗ Whole-house plan✓ Locally owned6/8
5. 5AllTech ServicesSterling · Google 4.9 from 3,372 · Yelp 3.9 from 156✓ HVAC + plumbing license✓ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✓ Posts prices✓ Posts plan price✓ Whole-house plan✓ Locally owned6/8
6. 6B&B Air Conditioning & HeatingSterling · Google 4.9 from 710 · Yelp 3.4 from 19✗ HVAC + plumbing license✓ Google 4.9+✗ Yelp 4.0+✓ Under 1% bad reviews✓ Posts prices✓ Posts plan price✗ Whole-house plan✓ Locally owned5/8
7. 7Climatic Heating & CoolingLeesburg · Google 5.0 from 1,663 · Yelp 4.8 from 267✗ HVAC + plumbing license✓ Google 4.9+✓ Yelp 4.0+✓ Under 1% bad reviews✗ Posts prices✗ Posts plan price✗ Whole-house plan✓ Locally owned4/8
8. 8Falcon Heating, Air Conditioning and PlumbingSterling · Google 4.9 from 1,976 · Yelp 3.1 from 69✓ HVAC + plumbing license✓ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✓ Posts prices✗ Posts plan price✗ Whole-house plan✓ Locally owned4/8
9. 9Donmar Heating, Cooling & PlumbingSterling · Google 4.9 from 1,218 · Yelp 3.9 from 41✗ HVAC + plumbing license✓ Google 4.9+✗ Yelp 4.0+✓ Under 1% bad reviews✗ Posts prices✓ Posts plan price✗ Whole-house plan✓ Locally owned4/8
10. 10Mannix Heating & CoolingChantilly · Google 4.9 from 967 · Yelp 4.0 from 65✓ HVAC + plumbing license✓ Google 4.9+✓ Yelp 4.0+✗ Under 1% bad reviews✗ Posts prices✗ Posts plan price✗ Whole-house plan✓ Locally owned4/8
11. 11Air 1 MechanicalSterling · Google 4.9 from 504 · Yelp 4.3 from 79✗ HVAC + plumbing license✓ Google 4.9+✓ Yelp 4.0+✗ Under 1% bad reviews✓ Posts prices✗ Posts plan price✗ Whole-house plan✓ Locally owned4/8
12. 12M.E. FlowLeesburg · Google 4.8 from 6,218 · Yelp 2.5 from 303✓ HVAC + plumbing license✗ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✓ Posts prices✓ Posts plan price✓ Whole-house plan✗ Locally owned4/8
13. 13Tempro Heating and AirLeesburg · Google 5.0 from 519 · Yelp 5.0 from 2, too few to count✗ HVAC + plumbing license✓ Google 4.9+✗ Yelp 4.0+✓ Under 1% bad reviews✗ Posts prices✗ Posts plan price✗ Whole-house plan✓ Locally owned3/8
14. 14Bowman's Plumbing, Heating, Air Conditioning & ElectricalSterling · Google 4.9 from 605 · Yelp 3.4 from 55✓ HVAC + plumbing license✓ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✗ Posts prices✗ Posts plan price✗ Whole-house plan✓ Locally owned3/8
15. 15Vernon Heating & CoolingSterling · Google 4.8 from 957 · Yelp 2.6 from 66✗ HVAC + plumbing license✗ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✓ Posts prices✓ Posts plan price✗ Whole-house plan✓ Locally owned3/8
16. 16Michael & SonAlexandria · Google 4.7 from 19,248 · Yelp 2.3 from 1,797✓ HVAC + plumbing license✗ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✓ Posts prices✗ Posts plan price✗ Whole-house plan✓ Locally owned3/8
17. 17F.H. FurrManassas · Google 4.8 from 26,399 · Yelp 1.7 from 880✓ HVAC + plumbing license✗ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✓ Posts prices✗ Posts plan price✗ Whole-house plan✗ Locally owned2/8
18. 18Snell Home ServicesSterling · Google 4.8 from 5,884 · Yelp 3.1 from 255✓ HVAC + plumbing license✗ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✓ Posts prices✗ Posts plan price✗ Whole-house plan✗ Locally owned2/8
19. 19Quality Air ExpertsSterling · Google 4.5 from 884 · Yelp 2.2 from 12✗ HVAC + plumbing license✗ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✗ Posts prices✓ Posts plan price✗ Whole-house plan✓ Locally owned2/8
20. 20YAZD MechanicalSterling · Google 4.4 from 589 · Yelp 2.2 from 142✗ HVAC + plumbing license✗ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✗ Posts prices✓ Posts plan price✗ Whole-house plan✓ Locally owned2/8
21. 21John Nugent & SonsSterling · Google 4.7 from 1,940 · Yelp 3.6 from 212✓ HVAC + plumbing license✗ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✗ Posts prices✗ Posts plan price✗ Whole-house plan✗ Locally owned1/8
22. 22Modern Mechanical (One Hour Heating & Air)Ashburn · Google 4.6 from 559 · Yelp 3.2 from 92✓ HVAC + plumbing license✗ Google 4.9+✗ Yelp 4.0+✗ Under 1% bad reviews✗ Posts prices✗ Posts plan price✗ Whole-house plan✗ Locally owned1/8