A boiler system can be an ideal way to heat your Oshkosh, WI, home, but if it stops working in the middle of a frigid Wisconsin winter, you’re going to be in a world of trouble. When you need boiler service, repair, or replacement, Black-Haak is your best choice. We’re a locally owned and operated heating and cooling company specializing in servicing boilers and whole-home heating systems. Boilers can break down without regular service, leaving you chilly in the winter or facing a large repair bill. Trust our team to come out and get your boiler working again – fast.