G Cullum Heating and Air

G Cullum Heating and Air is a family-owned HVAC contractor at 776 Joseph Biggs Memorial Highway in Rising Sun, founded by Gary Cullum in 2008. It serves more than 3,000 customers across Cecil, Harford, Chester and New Castle counties, with residential and commercial heating, cooling, Lennox equipment, indoor air quality and refrigeration. Work includes AC repair and replacement, furnace and heating repair and heat pump replacement, plus maintenance programs that protect the equipment, and commercial HVAC for local businesses. Free estimates and 24/7 emergency service are offered, and technicians are licensed under Maryland HVACR license 7354. The company gives honest assessments and timely service. Service areas stretch to Bel Air, Elkton, Havre de Grace and Oxford, Pennsylvania. Rated 4.9 from 150 Google reviews, 143 of them five stars.