Serving Calvert County

Great Mills Heating and Air Conditioning, Inc. is a Southern MD, locally owned, HVAC contractor serving Calvert County. We specialize in the repair, installation and servicing of Carrier home, residential, commercial, heat pumps, gas furnaces, propane furnaces, oil furnaces, water heaters, humidifiers and radiant heating.  We also repair any make or model of heating and cooling comfort control system, heat pump or furnace.

Great Mills is your Calvert County heat pump repair, heat pump maintenance and heat pump replacement contractor in existing homes and commercial comfort control systems in the following areas: Lusby and Solomons Island Calvert County, Maryland.

Ask us about Geothermal Heating and Cooling Systems

Great Mills Heating and Air also installs WaterFurnace geothermal systems for homes who manufactures and sells more than anyone else in the business.

Calvert County MD Heat Pumps, Heating & Cooling System Installation Services & System Types

• Heat Pumps Installations
  
• Heat Pump Service & Repair
  
• Air Conditioning Installations
  
• Air Conditioning System Service & Repair
  
• Propane Furnace Installations
  
• Propane Furnace Service & Repair
  
• Radiant Heating Installations
  
• Radiant Heating Service & Repair
  
• Oil Tank Installations
  
• Oil Tank Service & Repair
  
• Oil Furnaces Installations
  
• Oil Furnace Service & Repair
  
• Gas Furnaces Installations
  
• Gas Furnace Service & Repair
  
• Heating & Cooling Zoning
  
• Heating & Cooling System Service Agreements
  
• Heating & Cooling System Service & Repair
  
• Heating & Cooling Air Duct Cleaning
  
• Direct Heating & Cooling System Replacement
  
• Heating & Cooling System Service & Repair

For a FREE estimate or
service appointment click here

Phone: 301-994-0522   Emergency Service after 5pm: 240-925-2230