With over 15 years of experience, DHS Heating & Air provides quality service at affordable prices. Serving King County and the surrounding areas, we offer free estimates and emergency services 24/7. About Us DHS Heating & Air is a family owned and operated business. We specialize in residential and light commercial HVAC service, installation, and maintenance. We are equipped to handle a wide range of heating, air conditioning, water heating, and air quality needs. We service all makes and models of equipment.