The Largest HVACs in Maryland
1,288 active HVAC companies across Maryland, ranked two ways: by total locations and by revenue + popularity. The top of your lead list.
- 1,288 active HVAC companies across Maryland. 162 operate multiple locations; the rest are single-location independents.
- The top 9 by review count hold 37% of all Maryland HVAC companies reviews (88,244 of 238,567). Concentrated brand equity.
- 3 operators rank in both top-9 lists. The most valuable accounts to call: B & B Air Conditioning And Heating Service, Catons Plumbing & Water Cleanup, Len The Plumber Heating & Air.
Maryland HVAC companies by location count
Ranked by total locations operating across Maryland. 162 HVAC companies operate multiple locations the state; the top 9 are shown.
| Rank | HVAC | Locs | Reviews | Contacts |
|---|---|---|---|---|
| 01 |
Elite Heating And Cooling
Towson · ★3.5
|
11 | 52 | 10+ contacts |
| 02 |
Kinetics
Frederick · ★3.7
|
11 | 24 | 10+ contacts |
| 03 |
Len The Plumber Heating & Air
Halethorpe · ★4.7
|
9 | 46,561 | 10+ contacts |
| 04 |
Excel Aire Abingdon
Abingdon · ★4.9
|
9 | 74 | 10+ contacts |
| 05 |
Catons Plumbing & Water Cleanup
Catonsville · ★4.8
|
8 | 3,927 | 10+ contacts |
| 06 |
B & B Air Conditioning And Heating Service
Elkridge · ★4.9
|
7 | 3,012 | 10+ contacts |
| 07 |
Comfort Plus Services
Federalsburg · ★4.9
|
7 | 1,742 | 9 contacts |
| 08 |
Plumbing Pros Dmv
Gaithersburg · ★4.4
|
6 | 347 | 10+ contacts |
| 09 |
Frederick Plumbing & Heating
Frederick · ★4.2
|
6 | 23 | 10+ contacts |
Maryland HVAC companies by revenue and popularity
Ranked by total review count (popularity proxy). The top 9 collectively hold 37% of all Maryland HVAC companies reviews.
| Rank | HVAC | Reviews | Locs | Contacts |
|---|---|---|---|---|
| 01 |
Len The Plumber Heating & Air
Halethorpe · ★4.7
|
46,561 | 9 | 10+ contacts |
| 02 |
Gac Services
Gaithersburg · ★4.9
|
8,482 | 2 | 1 contacts |
| 03 |
Blue Dot Maryland
Forest Hill · ★3.5
|
7,715 | 2 | 4 contacts |
| 04 |
Boothe's Heating, Air, Plumbing, Drains & Electrical
Hollywood · ★4.9
|
6,270 | 2 | 3 contacts |
| 05 |
Larry & Sons
Hagerstown · ★4.4
|
5,954 | 3 | 6 contacts |
| 06 |
Catons Plumbing & Water Cleanup
Catonsville · ★4.8
|
3,927 | 8 | 10+ contacts |
| 07 |
Staton Heating, Cooling & Plumbing
Annapolis · ★5.0
|
3,274 | 2 | 3 contacts |
| 08 |
Beltway Air Conditioning & Heating
Hanover · ★4.8
|
3,049 | 5 | 4 contacts |
| 09 |
B & B Air Conditioning And Heating Service
Elkridge · ★4.9
|
3,012 | 7 | 10+ contacts |
Methodology
Two independent rankings, no composite score. By location count: total locations operated across Maryland (the chains and aggregators). By revenue and popularity: total review count across web and social channels (the cleanest available popularity proxy). Each row rolls up one HVAC company across all their locations.
HVAC company records draw from 12+ public and private data sources, refresh weekly, and are independently verified against at least two of them, including state license rosters from the Maryland Medical Board and publicly available business records. Owner contacts come from a separate 20+ source scan and refresh monthly.
About Orbital
Orbital is the Zoominfo for companies selling to SMBs. Our platform enables companies to get their whole TAM (total addressable market) in a box, find contacts not on LinkedIn, and score accounts with custom ICP attributes. The HVAC company directory you're reading right now is one slice of that platform, covering every US metro and state. See why companies including Instacart, Classpass, and Jobber are using Orbital today.
Common questions
Why use review count as the popularity proxy?
HVAC company revenue is notoriously hard to find publicly: most HVAC companies are independent, privately held, and don't publish financials. Review count is the cleanest available proxy for size and how established a business is, so the HVAC companies with the most reviews are typically the ones running the most volume.
Where are most Maryland HVAC companies concentrated?
Top Maryland HVAC company clusters by review volume: Halethorpe, Gaithersburg, Forest Hill, Hollywood. Orbital tracks 1,288 active HVAC companies across the state. 162 of them operate multiple locations.
How many HVAC companies are in Maryland?
Orbital tracks 1,288 active HVAC companies across Maryland. 162 operate multiple locations, accounting for the bulk of locations across the state.
Who is this list for?
B2B vendors who sell into HVAC companies: equipment manufacturers, parts and refrigerant distributors, field service management software, fleet and dispatch software, capital providers, M&A brokers, marketing agencies, and professional services. It is not a consumer directory and is not optimised for booking appointments.
How do I get owner contact info (mobile phone, email) for these HVAC companies?
Every HVAC company on the list has verified owner / GM contacts available upon signing up with Orbital. You get mobile phones, work emails, and decision-maker titles, not generic front-desk numbers. Contact records come from a separate scan of 20+ public and private data sources, independently verified before unlock, and refreshed monthly.
How often does the data refresh?
HVAC company records refresh weekly. Contact records refresh monthly. New HVAC companies that pass two-source verification get added on the next refresh, and HVAC companies that drop signals get flagged in the platform but are not silently removed from list snapshots.
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