Appleton’s Favorite Furnace Company

Since opening in 1956, Black-Haak has earned a reputation for excellence in Appleton, WI. Cold winters in the Fox Valley mean that you need reliable service if something goes wrong with your heating system. Our family-owned furnace company is dedicated to delivering quick and effective heating services.

Our knowledgeable technicians respond quickly to all calls 24 hours a day. We have a deep well of experience to draw upon because we’ve been in business for over six decades. We pass on our expertise through an apprenticeship program. You can count on us to put our heads together and solve your heating problem.

Great reasons to trust us:
  • Service for all makes and models
  • High-quality 24/7 emergency service
  • A+ BBB rating
  • Energy Star-certified products