Sunn Corp has been serving the Maryland area with superior heating and cooling service, ac repair and heating repair for over 30 years. We serve Ashton, Barnesville, Beallsville, Boyds, Brookville, Burtonsville, Cabin John, Chevy Chase, Clarksburg, Damascus, Derwood, Dickerson, Gaithersburg, Garrett Park, Germantown, Glenmont, Glen Echo, Kensington, Laytonsville, Montgomery Village, Olney, Potomac, North Potomac, Rockville, Sandy Spring, Silver Spring, Spencerville, Sunshine, Takoma Park, Wheaton and Washington Grove with quality air conditioning and heating products and repair. We repair and replace Carrier, Trane, York, GE , Rudd, Rheem, Heil, Air Temp,Chrysler, Borg Warner, Westinghouse, Singer, Lenox, Comfort Maker, Bryant, American Standard, Miller, Janitrol, Goodman, Columbia, Luxaire, Temp Star, Sears and Tappen products.