We serve Frederick and Washington Counties with a full range of HVAC products including heat pumps, air handlers, and ductless mini split systems. Call 240-674-3100!
Cornerstone HVAC sells the most reliable heating and air conditioning systems on the market. We are now a Trane HVAC Dealer along with being a New Bosch Accredited Dealer on their amazing 18 SEER Inverter HVAC systems. We are also a dedicated Rheem Dealer as well. We have a long history of providing Boiler and Oil Burner work and we install Weil McLain boilers and Burnham boilers as well.
Whether you are in need of a new or replacement boiler, heat pump, radiator, ventilation system, air conditioner, geothermal heating unit, air handler, or ductless mini split system, trust our professionals for HVAC equipment from leading manufacturers with exceptional warranties. Check out some of the heating and cooling systems we have recently installed below!
3 Pretty Heat Pumps all in a row!
Air Handler for the spiral ductwork
Bad Snake!
Bad York! Leaking Again!
Bosch 3 Ton Air Handler “The Cats Meow” Too!
Bosch 3 Ton Heat pump “The Cats Meow”!
Craning the Coolair up for some Apartments at 10 N. Market St.
Dead Snake
Ductless perfection By Dave Puddy
Leaking York Heat pump condensing unit
Mike’s Truck
More dog urine issues
Old 40 Ton Unit
Old 40 ton with a 120,00 BTU Reznor Furnace inside it!
Removing Leaking Heat Pump Condensing Coil
Shinny new coil
Spiral Duct Job we did
Spiral Duct registers
The lone Trane
The vehicles with different logos
Two Mitsubishi Ductless units surrounding a Fujitsu Ductless mini split system
What dog urine does to your outdoor unit
Yukon Wood, coal and oil Burner Hot Air Furnace Change out
