Coupons Check out our heating and air conditioning discounts that we offer at Comfortech Inc. We also offer military and senior discounts. Business Hours 24/7 Emergency Service Available Coverage Area Prince William County, Stafford County and Northern Virginia. Including the cities of Woodbridge, Montclair, Lake Ridge, Dale City, Triangle and Stafford. Licensed, Bonded and Insured Master HVAC Technician LicenseMaster Gas-Fitter licenses. Payment We Accept Financing is available. We offer payment plans on new system installations.