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NAICS 238220 · Plumbing, Heating, and Air-Conditioning Contractors

you asked:

Heating and air conditioning in Frederick, MD

18 heating and air conditioning in Frederick, MD; 82 within 30 miles. Every listing checked against the issuer's record, in the published order.

  1. Above and Beyond Plumbing & Heating

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Above and Beyond Plumbing & Heating
    USDOT registration
    US-DOT 3161759
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (240) 216-8767
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  2. Bst Plumbing and Heating

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Bst Plumbing and Heating
    USDOT registration
    US-DOT 2555306
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (240) 344-2121
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  3. Classic Plumbing & Heating Inc

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Classic Plumbing & Heating Inc
    USDOT registration
    US-DOT 1356939
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 695-7934
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  4. Crystal Heating and Air Conditioning

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Crystal Heating and Air Conditioning
    USDOT registration
    US-DOT 1112521
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 252-0180
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  5. Dave's Cooling & Heating

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Dave's Cooling & Heating
    USDOT registration
    US-DOT 3016886
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 401-2780
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  6. Dennison Plumbing & Heating Inc

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Dennison Plumbing & Heating Inc
    USDOT registration
    US-DOT 1011129
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 473-4015
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  7. Dun-Rite Plumbing & Heating

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Dun-Rite Plumbing & Heating
    USDOT registration
    US-DOT 2488899
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 696-8852
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  8. Ez Heating and Air

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Ez Heating and Air
    USDOT registration
    US-DOT 4362692
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 452-2237
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  9. Frederick Plumbing and Heating Inc

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Frederick Plumbing and Heating Inc
    USDOT registration
    US-DOT 3118794
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 305-6029
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  10. Gilberts Refrigeration

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Gilberts Refrigeration
    USDOT registration
    US-DOT 1325338
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 662-8363
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  11. Harris Heating & Cooling Inc

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Harris Heating & Cooling Inc
    USDOT registration
    US-DOT 1215561
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 473-8126
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  12. NE Bob Waltz Plumbing & Heating Inc

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for NE Bob Waltz Plumbing & Heating Inc
    USDOT registration
    US-DOT 1834800
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 662-3588
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  13. Phoenix Mechanical Group Inc

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Phoenix Mechanical Group Inc
    USDOT registration
    US-DOT 2513926
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 758-0157
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  14. Rj Smith Plumbing & Heating Inc

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Rj Smith Plumbing & Heating Inc
    USDOT registration
    US-DOT 1516944
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 898-9003
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  15. Tetteris Heating & Air

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Tetteris Heating & Air
    USDOT registration
    US-DOT 3946001
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (443) 676-8928
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  16. W G Welch Mechanical Contractors LLC

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for W G Welch Mechanical Contractors LLC
    USDOT registration
    US-DOT 2412374
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (240) 699-1021
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  17. Warner Mechanical - Warner Construction - Kaempf and Harris Custom Sheetmetal

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Warner Mechanical - Warner Construction - Kaempf and Harris Custom Sheetmetal
    USDOT registration
    US-DOT 565318
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (301) 662-5387
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  18. Woodlawn Mechanical Contractors Inc

    ActivePrivate motor carrier

    Frederick, MD

    CallAsk it
    Proof for Woodlawn Mechanical Contractors Inc
    USDOT registration
    US-DOT 4504089
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Frederick, MD · serves Maryland
    Phone
    (505) 453-1458
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  19. Apex HVAC Solutions

    ActivePrivate motor carrier

    Jefferson, MD · 10 mi away

    CallAsk it
    Proof for Apex HVAC Solutions
    USDOT registration
    US-DOT 4487293
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Jefferson, MD · serves Maryland
    Phone
    (240) 617-1323
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

  20. C a King Jr Plumbing & Heating Inc

    ActivePrivate motor carrier

    Middletown, MD · 8 mi away

    CallAsk it
    Proof for C a King Jr Plumbing & Heating Inc
    USDOT registration
    US-DOT 1308007
    Issuer
    US-DOT
    Status
    Active
    Class
    Private motor carrier
    Checked
    Oct 23, 2026
    Where
    Middletown, MD · serves Maryland
    Phone
    (301) 371-6930
    Listing
    Built from public records. Not claimed yet, so call them directly.
    Proof → US-DOT record

More cities in Maryland

Baltimore 28Westminster 11Gaithersburg 9Pasadena 8Easton 6Mechanicsville 6Upper Marlboro 6Forest Hill 5Owings 5

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