B&B Air Conditioning & Heating Service

B&B Air Conditioning & Heating Service handles residential and light commercial HVAC and lists a Gaithersburg location among several in Maryland and Virginia. It works on oil and gas furnaces, oil and gas boilers, heat pump heating and cooling, ductless mini-split systems and geothermal cooling, plus ductwork installation and repair, thermostats, water heaters and whole-home generators. A 24/7 emergency service line is posted, service plans and financing are available, and installations carry a 2-year warranty that includes a complimentary service-maintenance agreement. The company runs its own training institute for heat pump technology, founded in 1991. Hours are Monday to Friday 7:30am to 5:30pm and Saturday 8:00am to 1:00pm, with service across Maryland, Virginia and Washington, DC. Rated 4.9 from 340 Google reviews, 326 of them five stars.