South · Climate zones 4–5
HVAC service in Maryland
Maryland's climate shifts from humid, mild coastal areas on the Eastern Shore to colder western mountains. Baltimore and the D.C. suburbs need strong cooling in summer and reliable heating in winter.
- 469 ZIP codes covered
- 324 cities and towns
- Licensed contractors
Maryland HVAC at a glance
- Climate
- Mixed (IECC zones 4–5)
- What it means
- Real heating and cooling seasons. Heat pumps and dual-fuel systems are popular, and both spring and fall maintenance pay off.
- Common systems
- Heat pumps, Gas furnace + central AC, Boilers and radiators, Ductless mini-splits
- Coverage
- 469 ZIP codes in 324 cities and towns
- Region
- South
Homes & equipment
Heating and cooling in Maryland
Baltimore rowhouses often use gas boilers or furnaces with window units or mini-splits, while suburban homes in Montgomery, Howard and Anne Arundel counties commonly have heat pumps or gas furnaces with central AC.
Western Maryland near Garrett County is colder and more heating-focused, with oil and propane still in use.
Common problems
HVAC problems we see in Maryland
Rowhouse cooling
Older rowhouses often lack ducts, making mini-splits a common upgrade.
Oil heat conversions
Homes on oil or propane often compare heat pumps and dual-fuel systems.
Humid summers
Proper sizing and dehumidification improve comfort in the Chesapeake region.
City guides
HVAC city guides in Maryland
Other Maryland areas in our network
Contractors in our network also cover Silver Spring, Bethesda, Gaithersburg, Rockville, Annapolis, Bowie, Laurel, Hyattsville, Frederick, Towson, Capitol Heights, Upper Marlboro, and 311 more communities. Enter your ZIP code in the request form to check yours.
Recommended
Services Maryland homeowners need most
Contractor licensing in Maryland
Maryland licenses HVACR contractors through the State Board of Heating, Ventilation, Air-Conditioning and Refrigeration Contractors.
Utilities in Maryland
BGE, Pepco, Delmarva Power and Potomac Edison supply electricity in different regions; BGE and Washington Gas supply natural gas in many areas.
FAQ
Maryland HVAC questions
How do I check an HVAC contractor's license in Maryland?+
Use the Maryland Department of Labor's license lookup for the HVACR Board.
Are mini-splits good for Baltimore rowhouses?+
Yes. They avoid running new ducts through plaster walls and can heat and cool individual floors.
Other states in the South
HVAC help in Maryland
Call to be connected with a licensed HVAC contractor serving your ZIP code, or send a request online.