Maryland HVAC Contractors
U.S. · 1,277 locations
1,277 HVAC businesses in Maryland in one CSV, one row per business location. 1,034 have a phone number, 497 an email address and 724 a website.
More about this list
Maryland licenses HVAC contractors but publishes no free statewide list, so most rows have no license number. The 394 rows that do have one hold a license in another state; licenseState says which. 12 rows are a licensed person at an address where no business name is published (listedAs says so). 103 are members of the Air Conditioning Contractors of America. We read each business's own website for its email, social links and the services it lists. 464 list their services, such as AC repair, heat pumps or maintenance plans, and 201 say they do commercial work. Largest cities: Baltimore 78, Frederick 53, Gaithersburg 49, Rockville 47. Buyers use it to recruit service partners, sell to contractors and size markets.
The file has all 1,277 locations in one download. Building the same list by searching one area at a time tends to miss places, and a missed place looks like a gap in coverage that is not really there.
Need just some of them? Ask in your own words.
●Where the rows are
≡Sample Data Preview
| name | address | city | state | zip | phone | website | email source | licensed | license state | license number | license type | license status | license expires | license basis | licensee name | listed as | acca member | acca quality assured | web services | web hours | web facebook | web instagram | web linkedin | web twitter | web youtube | web tiktok | web whatsapp | web yelp | web google maps | web founded year | web legal name | web legal type | web status | website brand page | website not working | county | locations with same name | naics code | naics title | sic code | sic title | sources | merged from | merged names | merged phones | hvac id | overture id | overture category | overture confidence | overture brand | overture sources | overture updated | overture release | web email | license class | license source url | acca id | acca qi verified | acca badges | acca profile url | lic classifications | lic effective date | lic license count | lic dba | lic enforcement action | lic renewal in progress | lic original date | geo precision | county fips | county note | address quality | zip4 | country | latitude | longitude | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CK Mechanical | 1525 S Philadelphia Blvd | Aberdeen | MD | 21001 | (443) 484-2212 | https://ck-mechanical.com/ | N | business | N | AC repair | AC installation / replacement | heating / furnace | heat pumps | ductless / mini-split | boilers / hydronic | ductwork / duct cleaning | indoor air quality | commercial HVAC | refrigeration | 24/7 emergency service | Mo-Fr 08:00-16:30 | https://www.facebook.com/CKMechanic | https://maps.google.com/maps?q=1525+South+Philadelphia+Boulevard%2C+Aberdeen%2C+MD+21001&z=15&mrt=loc | 2008 | ok | Harford County | 3 | 238220 | Plumbing, Heating, and Air-Conditioning Contractors | 1711 | Plumbing, Heating and Air-Conditioning | Overture | ov:6250e56e-c2ea-4f4d-9adb-3e14c1f03f29 | 6250e56e-c2ea-4f4d-9adb-3e14c1f03f29 | hvac_service | 0.92 | Microsoft | 2026-08-10 | 2026-08-19.1-v2 | source | 24025 | complete | US | 39.482027 | -76.212635 | ||||||||||||||||||||||||||||||||||||||||||
| Multi-Aire | 29740 Charlotte Hall Rd | Charlotte Hall | MD | 20622 | (301) 856-3400 | http://multiaire.com/ | april@multiaire.com | overture | N | business | N | https://www.facebook.com/191526537120 | ok | St. Mary's County | 1 | 238220 | Plumbing, Heating, and Air-Conditioning Contractors | 1711 | Plumbing, Heating and Air-Conditioning | Overture | ov:10848673-6e19-4c4e-844b-59b1fcf40b4f | 10848673-6e19-4c4e-844b-59b1fcf40b4f | hvac_service | 0.92 | meta | 2026-08-10 | 2026-08-19.1-v2 | source | 24037 | ZIP 20622 spans 2 counties; assigned to the county holding 17% of its land area | complete | 3046 | US | 38.485336 | -76.778923 | ||||||||||||||||||||||||||||||||||||||||||
| TriState Home Services | 82A Wormans Mill Court | Frederick | MD | 21701 | (301) 245-3861 | http://tristatehomeservices.com | info@tristatehomeservices.com | website | N | business | Y | no | AC repair | AC installation / replacement | heating / furnace | heat pumps | ductless / mini-split | boilers / hydronic | geothermal | ductwork / duct cleaning | indoor air quality | commercial HVAC | plumbing | water heaters | electrical | generators | 24/7 emergency service | financing | Monday,Tuesday,Wednesday,Thursday,Friday 08:00-16:30 | https://www.facebook.com/166994871457 | https://www.facebook.com/TriStateHomeServices | https://www.instagram.com/tristatehomeservices | https://www.linkedin.com/company/tri-state-home-services-llc | https://twitter.com/tshomeservices | https://www.yelp.com/biz/tristate-home-services-frederick | 1949 | ok | Frederick County | 1 | 238220 | Plumbing, Heating, and Air-Conditioning Contractors | 1711 | Plumbing, Heating and Air-Conditioning | ACCA member; Overture | Overture: TriState Home Services | (301) 288-3655 | ov:35e85bf7-f7c0-4e3e-b2bc-71f5570d9ad0 | 35e85bf7-f7c0-4e3e-b2bc-71f5570d9ad0 | hvac_service | 0.92 | DAC | 2026-08-11 | 2026-08-19.1-v2 | info@tristatehomeservices.com | 68518223 | no | https://hvac-contractors.acca.org/company-profile/tri-state-home-services-frederick/68518223 | source | 24021 | complete | US | 39.443532 | -77.398799 | |||||||||||||||||||||||||||||
| LIMBACH COMPANY LLC | 13261 MID ATLANTIC BLVD | Laurel | MD | 20708 | Y | VA | 2705073647 | Class A Contractor [PLB ELE GFC HVA] | Active | 2027-02-28 | license | LIMBACH COMPANY LLC | business | N | Prince George's County | 1 | 238220 | Plumbing, Heating, and Air-Conditioning Contractors | 1711 | Plumbing, Heating and Air-Conditioning | VA license | lic:VA:2705073647:20708:13261 | https://www.dpor.virginia.gov/sites/default/files/Records%20and%20Documents/Regulant%20List/2705a__crnt.txt | source | 24033 | complete | US | 39.071821 | -76.866766 | ||||||||||||||||||||||||||||||||||||||||||||||||
| RENOVATIONS EXPERT INC | 5824 HUBBARD DR | Rockville | MD | 20852 | Y | VA | 2705119893 | Class B Contractor [PLB ELE GFC FSP SPR HVA] | Active | 2027-09-30 | license | RENOVATIONS EXPERT INC | business | N | Montgomery County | 1 | 238220 | Plumbing, Heating, and Air-Conditioning Contractors | 1711 | Plumbing, Heating and Air-Conditioning | VA license | lic:VA:2705119893:20852:5824 | https://www.dpor.virginia.gov/sites/default/files/Records%20and%20Documents/Regulant%20List/2705b__crnt.txt | source | 24031 | complete | US | 39.054668 | -77.119796 |
{}What's in each row
| Field | What it is | Rows filled |
|---|---|---|
| name | Business name (a licensed person's name where listedAs says no business name is published) | 100% |
| address | Street address | 100% |
| city | City | 100% |
| state | Two-letter state where the business is | 100% |
| zip | ZIP code | 100% |
| country | Country | 100% |
| phone | Phone number | 81% |
| Email address | 39% | |
| email | license, overture or website: where the email came from | 39% |
| website | The business's own website | 57% |
| licensed | Y when a state license, registration or bond is joined to the row | 100% |
| license | State(s) that issued the license | 31% |
| license | License number(s) | 31% |
| license | License type as the state names it | 31% |
| license | License status where the state publishes one | 30% |
| license | License expiry date | 31% |
| license | license, registration (Iowa) or bond (Minnesota) | 31% |
| licensee | Licensee name | 31% |
| listed | business, or a licensed individual with no business name published | 100% |
| acca | Y for Air Conditioning Contractors of America members | 100% |
| acca | Acca quality assured | 8% |
| web | Services the business's website lists: AC repair, heat pumps, ductless, boilers, commercial HVAC, refrigeration, maintenance plans... | 36% |
| web | Opening hours from the website | 12% |
| Social profile from open map data | 27% | |
| web | Facebook page linked from the website (also webInstagram, webLinkedin, webYelp and more) | 28% |
| web | Web instagram | 11% |
| web | Web linkedin | 7% |
| web | Web twitter | 8% |
| web | Web youtube | 7% |
| web | Web tiktok | 2% |
| web | Web yelp | 5% |
| web | Web google maps | 18% |
| web | Year founded, where the website says | 14% |
| web | Legal entity name from the website footer | 10% |
| web | Web legal type | 10% |
| web | What reading the website found: ok, dead, parked, another business's site... | 65% |
| website | Website not working | 12% |
| latitude | Latitude | 100% |
| longitude | Longitude | 100% |
| county | County the location is in | 100% |
| locations | How many rows in the file trade under the same name (branches of one company) | 99% |
| naics | 238220 Plumbing, Heating, and Air-Conditioning Contractors | 100% |
| naics | Naics title | 100% |
| sic | 1711 Plumbing, Heating and Air-Conditioning | 100% |
| sic | Sic title | 100% |
| sources | Every source behind the row | 100% |
| merged | The source rows merged into this one | 13% |
| merged | Merged names | 12% |
| merged | Merged phones | 2% |
| hvac | Stable row id (Overture id, ACCA id, or state + license number) | 100% |
| overture | Overture id | 73% |
| overture | Overture category | 73% |
| overture | Overture confidence | 73% |
| overture | Overture brand | 1% |
| overture | Overture sources | 73% |
| overture | Overture updated | 73% |
| overture | Overture release | 73% |
| web | Web email | 23% |
| license | License class | 1% |
| license | License source url | 31% |
| acca | Acca id | 8% |
| acca | Acca qi verified | 8% |
| acca | Acca badges | 2% |
| acca | Acca profile url | 8% |
| lic_ | Lic classifications | 5% |
| lic_ | Lic dba | 2% |
| geo_ | How exact the map point is: the source's own point, the street address, or the ZIP code's centre | 100% |
| county_ | Five-digit federal code of that county | 100% |
| county_ | How the county was found, where it was not given by the source | 24% |
| address_ | Whether the street address is complete, missing a house number, or a PO box | 100% |
| zip4 | Zip4 | 9% |
Rows filled is measured on every row of the delivered file.
✓Where this data comes from
This dataset is compiled from the public directory or register named in its description, one record per location.
October 15, 2026
Snapshot built
78 fields
Columns in the file
Fill measured
On every row of the delivered file
How we build and date every file: methodology.
Using ChatGPT, Claude or an API?
No setup needed. Ask ChatGPT or Claude your question about the Maryland HVAC Contractors and give it this page: it can open https://locationlists.com/find?dataset=maryland-hvac-contractors with the filters you need and show you the count and price.
Using ChatGPT or Claude? Tell it to answer from locationlists.com/find — no account, no connector.
How assistants ask
No connector needed. Any AI assistant can answer from this site with a web link, no connector, no account: open https://locationlists.com/find with the question as query parameters.
If a question needs filtering, distance, drive time, combining lists or a price, open a /find link: either put the question itself in q=, or build the structured link. The answer does not need an API, a connector or an account.
Simplest, the question itself: https://locationlists.com/find?q=<the question in plain words>
Or set the parts yourself: https://locationlists.com/find?dataset=<slug>&state=<ST>&city=<city>&county=<county>&zip=<zip>&near=<place or zip>&radius=<miles>&drive=<minutes>&where=<column>:<op>:<value>&total=<rows>
Leave out what the question does not need. Use radius for straight-line miles or drive for minutes of driving (5 to 60), not both; near can name several places separated by | to reach from any of them. To ask about several lists at once, use datasets with two or more names, or category with a kind of business. To compare two lists, add relate=nearest and the other list with b. in front of its parameters. To count by area, use areas=county (or zip, state, metro). To keep only places whose county, ZIP code, metro area or state meets a Census figure, add area_where (for example county:population>1000000); with areas, per=100000 gives counts per 100,000 residents.
Links an assistant can open, each showing how many rows match, a few preview rows and the price for just that part:
- Within 25 miles of Baltimore, MD, the busiest area: https://locationlists.com/find?dataset=maryland-hvac-contractors&near=Baltimore+MD&radius=25
- Within a 30-minute drive of Baltimore, MD: https://locationlists.com/find?dataset=maryland-hvac-contractors&near=Baltimore+MD&drive=30
- Only rows where licensed is Y: https://locationlists.com/find?dataset=maryland-hvac-contractors&where=licensed%3Aeq%3AY
- Every HVAC Contractors list combined, within 25 miles of Jessup, MD: https://locationlists.com/find?category=hvac-contractors&near=Jessup+MD&radius=25
- Each one's nearest Tennessee HVAC Contractors, in Maryland, with miles: https://locationlists.com/find?dataset=maryland-hvac-contractors&state=MD&relate=nearest&k=1&b.dataset=tennessee-hvac-contractors&b.state=MD
- The whole list: add a city, state, ZIP code or distance:
https://locationlists.com/find?dataset=maryland-hvac-contractors - In plain words: "Maryland HVAC Contractors within 25 miles of Baltimore, MD": https://locationlists.com/find?q=Maryland+HVAC+Contractors+within+25+miles+of+Baltimore%2C+MD
Optional: connect for repeat use or wallet payments:
Read https://locationlists.com/skill.md and follow the instructions to connect LocationLists. Then show me the Maryland HVAC Contractors list.Your assistant will walk you through setup and show you the price before you pay.
For developers
At 1,277 records this dataset is not sold by the row — buy the file. Without a connector, open https://locationlists.com/find?dataset=maryland-hvac-contractors. An agent connected to https://locationlists.com/mcp can still search it, read a free sample file of up to 10 rows and buy the whole file itself. How agent purchasing works
?Frequently Asked Questions
Are these all licensed?
Maryland licenses HVAC contractors but publishes no free statewide list, so most rows have no license number. The 394 rows that do have one hold a license in another state; licenseState says which. Every row is an HVAC business found in open map data, the ACCA directory or another state's license roll.
How many have an email address and a phone number?
497 of 1,277 have an email and 1,034 a phone. Email comes from the license roll, from open map data or from the business's own website, and emailSource says which.
Where does the list come from?
Three sources: open map data from the Overture Maps Foundation (HVAC businesses), the Air Conditioning Contractors of America member directory, and state license rolls. When two sources list the same business at the same place, it is one row; sources and mergedFrom name every source behind it.
Can I buy every state at once?
Yes. The US HVAC Contractors file has all 50 states and Washington DC, 89,238 businesses. It costs the 51 state lists added up, less 10%.