Active Heating provides full commercial maintenance and service across Northeast South Dakota, including rooftop units, office buildings, and large facilities.

Active Heating, Inc. | Est. 1978 Active Heating, Inc. provides reliable HVAC and plumbing services for Watertown, Brookings, and the surrounding South Dakota region. Since 1978, we’ve focused on quality workmanship, dependable service, and building long-term trust with the communities we serve. We offer full residential and commercial solutions including heating, cooling, ventilation, plumbing, and indoor air quality. From new system installations to repairs, replacements, and 24/7 emergency service, our team is equipped to handle every project with care and expertise. Our services include: • HVAC installation, service & repair • Heating systems, furnaces & boilers • Air conditioning & heat pumps • Full plumbing services • Water heaters & softeners • Ductwork & ventilation • Indoor air quality solutions • 24/7 emergency support Backed by a skilled team and industry-leading products, we’re committed to keeping homes and businesses comfortable, efficient, and running smoothly year-round. Learn more at activeheatinginc.com | your local partner for heating, cooling, and plumbing.