Welcome to the heart of Streitz Heating & Cooling! From frigid January nights to humid July afternoons, Dundas homeowners count on our 46+ years of HVAC expertise to keep their living spaces comfortable and energy-efficient. Our certified technicians arrive in fully stocked vans, ready to repair, replace, or maintain any make or model—often on the first visit.

Nestled along the Cannon River, Dundas sees 100 °F July highs and –10 °F January lows—sometimes in the same week. When the weather swings, you need an HVAC partner that can pivot just as fast. For more than 46 years, Streitz Heating & Cooling has been the local go-to for furnace repair, AC installation, and year-round indoor air quality (IAQ) solutions. Our family lives, shops, and volunteers right here, so we understand the quirks of century-old farmhouses on Railway Street as well as the high-efficiency systems in new builds near Mill Town Trail. We combine small-town service values with cutting-edge training and EPA certifications—all backed by a 24/7 live phone line at (507) 645-4040.

Whether you’re battling frozen coils, rising utility bills, or persistent humidity, one call connects you to a team that treats every home like its own.

Great service starts with trust, but it’s sustained by capability. Streitz doesn’t dabble in heating and cooling—we specialize in it, bringing the same meticulous care to a cracked heat exchanger as we do to a complex geothermal loop or a whole-home air-exchanger installation. Our technicians arrive in clearly marked vans loaded with factory-authorized parts, so most repairs are finished in a single visit.

From emergency fixes to proactive efficiency upgrades, Streitz Heating & Cooling is the one number you need to remember: (507) 645-4040.