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How to Start an HVAC Business in Maryland

HVAC work pays well and comes with built-in repeat business: every system needs seasonal maintenance and eventually a replacement. Most owners start as experienced technicians. Licensing is set by states and cities, while refrigerant handling falls under federal EPA rules.

Reviewed November 5, 2026 · Sources linked inline

Maryland requirements for this business

  • Every contractor who offers or provides HVACR services in Maryland must hold a license from the State Board of HVACR Contractors in the appropriate category, including out-of-state contractors. [source]
  • License levels include apprentice, journeyman (at least 6,000 training hours over four years as an apprentice), master, master restricted, and limited; each exam requires a 70% passing score. [source]
  • A master HVACR license requires a journeyman license, three years of experience under a master, 1,875 hours worked in the prior year, and passing the master exam. [source]
  • Master contractors who contract work must provide a certificate of insurance to the Board. [source]

Statewide steps for every Maryland business — forming an LLC or registering a business name with the Maryland Department of Commerce — are on our state licensing directory.

FirstBizGuide is not a government agency: any license or registration fees are paid directly to the agency named in each source. These are the Maryland facts we have verified so far, not a complete list. City and county rules vary — check with your local government before opening.

Startup costs

We haven't found a reliable published cost range for this business, so we don't show one. Costs vary widely by market, equipment and whether you buy new or used. Plug your own quotes into the worksheet:

Open the HVAC contractor cost worksheet →

SBA 7(a) loans in this industry

Plumbing, Heating, and Air-Conditioning Contractors (NAICS 238220): 3,358 loans approved in FY2024–FY2026. Median loan $175,000; middle half $63,125–$450,000.

Loan size is not startup cost — these loans also fund acquisitions, real estate and working capital. Full breakdown and caveats →

How much competition is there?

Census industry: Plumbing, Heating, and Air-Conditioning Contractors (NAICS 238220)

In Maryland: 1,986 employer establishments (2023) and 3,789 businesses without employees (2024). Nationwide: 111,207 employer establishments (2023) and 189,085 businesses without employees (2024).

See counts for your county → Counts aren't a measure of saturation — see the caveats on the tool page.

Equipment and supplies

  • Manifold gauges or digital refrigerant analyzer
  • Refrigerant recovery machine and recovery cylinders
  • Vacuum pump and micron gauge
  • Leak detector, multimeter and clamp meter
  • Brazing torch kit, tubing cutters and flaring tools
  • Service van with parts shelving
  • Ladders and PPE
  • Field service software for scheduling and maintenance plans

Licenses and registration

  • If you form an LLC or corporation, register it with your state; if you use a business name other than your own, file a trade name (DBA) where your state requires it (in some states that's the county).
  • Most states or cities license HVAC or mechanical contractors, often requiring documented experience and an exam; check your state contractor board and your city building department.
  • EPA requires technicians who maintain, service, repair or dispose of equipment that could release ozone-depleting refrigerants to be Section 608 certified by passing an EPA-approved test from an EPA-approved certifying organization; the credentials do not expire. [source]
  • Under EPA's refrigerant sales restriction, Section 608 certified technicians, and employers who give the wholesaler written proof that they employ at least one certified technician, can generally buy any type of ozone-depleting or substitute refrigerant. [source]
  • Installing or replacing equipment usually requires a permit and inspection from the local building department.
  • Firms paid for work that disturbs paint in homes and child-occupied facilities built before 1978 must be certified under the EPA Renovation, Repair and Painting (RRP) rule, unless an exemption such as minor repair applies; EPA says window replacement and demolition of painted surfaces are always covered. [source]
  • Some states run their own lead-based paint (RRP) program instead of EPA; if yours does, certify with the state. [source]
  • Commercial clients and general contractors often ask for a certificate of insurance, a W-9 and proof of license.
  • Get a free Employer Identification Number (EIN) from the IRS if you will hire employees or form an LLC or corporation. Beware of sites that charge for this. [source]
  • To find your state's business registration office, use the SBA's state-by-state registration lookup. [source]

Insurance to consider

  • General liability (water damage, fire and property damage claims)
  • Commercial auto for service vans
  • Tools and equipment (inland marine) coverage
  • Workers' compensation once you hire
  • Contractor license bond if your state or city requires one

Get quotes from several carriers or an independent agent; coverage needs depend on your contracts, state and staff.

Financing options

  • SBA 7(a) loans — the SBA's main guaranteed loan program, made through participating lenders. [source]
  • SBA Microloans — smaller loans delivered through nonprofit intermediary lenders. [source]
  • SBA Lender Match — a free tool that connects you with interested SBA lenders. [source]
  • Free counseling from your local SBDC or SCORE chapter can help you build the business plan lenders ask for. [source]

Estimate payments with the loan calculator, then check runway with the cash flow projection.

Ongoing operating expenses

  • Equipment and parts (usually billed per job)
  • Refrigerant
  • Fuel and van maintenance
  • Insurance
  • Technician wages
  • License renewals and continuing education
  • Software subscriptions
  • Marketing

Use the break-even calculator to see how many jobs or sales cover them.

Common mistakes

  • Underpricing service calls and diagnostic time
  • Doing installs without pulling permits
  • Venting or mishandling refrigerant
  • No maintenance-agreement program for repeat revenue
  • Carrying too little working capital for equipment purchases

Finding customers

  • Google Business Profile and local service listings
  • Seasonal tune-up offers before summer and winter
  • Maintenance agreements with renewal reminders
  • Referrals from realtors, home inspectors and property managers
  • Partnerships with general contractors and builders

Startup checklist

Ticks are saved on this device and appear on My plan.

Compare with other businesses

Sources