Cardinal Plumbing Heating & Air Inc

Cardinal Plumbing Heating & Air has served Sterling and the rest of Northern Virginia since 2013, with service pages for Alexandria, Gainesville and Herndon as well. Its HVAC services include AC installation and replacement, furnace installation and repair, seasonal tune-ups, air duct sealing, repair and replacement, whole-home air filtration and smart thermostats, alongside a full plumbing line. The team is on call 24/7 for emergencies and works seven days a week. Systems are advertised from as low as $98 a month, with flexible financing, and a maintenance plan with a membership covers routine inspections. A satisfaction guarantee and upfront pricing are part of the pitch. Rated 4.9 from 3,104 Google reviews, 2,899 of them five stars. Technicians are described as licensed and certified.