FURNACE

Minnesota winters are no joke—and neither is a broken furnace when temperatures drop. That’s why Thelen Heating offers 24/7 emergency service and installs only the most reliable, high-efficiency heating systems on the market. From quiet operation to consistent, energy-saving performance, we believe investing in quality upfront means more comfort, fewer repairs, and peace of mind all season long.

A/C

When summer hits, Thelen Heating is here to keep your home cool and comfortable. We service and install a full range of air conditioning systems, including central air units, Lennox® mini splits, and Gree® mini split systems—ideal for spaces without ductwork or for energy-efficient zoning. Whether you’re looking to upgrade an old unit or need fast repairs, our experienced technicians deliver reliable, high-performance solutions tailored to your home.

BOILERS

Modern boilers offer reliable, energy-efficient heating—and Thelen Heating is here to help you choose the right one for your home. Our expert technicians install top-performing systems with a focus on safety, comfort, and long-term savings. With professional service and quality workmanship, we’ll get the job done right the first time—no stress, just consistent warmth you can count on.

AIR EXCHANGERS

Fresh air matters—especially in well-sealed homes. Air exchangers help circulate clean, fresh air while removing stale air, humidity, and indoor pollutants—all without cracking a window. At Thelen Heating, our certified technicians install high-efficiency air exchangers designed to improve air quality, comfort, and energy efficiency. Let us help you breathe easier year-round.

Ventilation & Air Purification

Poor indoor air quality can trigger allergies, congestion, and coughing—but Thelen has solutions. From air purification and humidification systems to custom ductwork and ventilation, we’ll help you breathe easier. With in-house sheet metal fabrication and expert design, we deliver cleaner, healthier air for your home or business.

Water Heaters

At Thelen Heating, we provide comprehensive water heater installation and maintenance for all your hot water needs. Whether you prefer a traditional tank-style system or the endless supply of a tankless unit, our certified technicians can guide you to the best solution. From sizing to installation, maintenance, and repairs, Thelen’s team delivers reliable hot water solutions—backed by prompt, professional service you can count on year‑round.

Located in the Brainerd lakes area, Thelen Heating and Roofing Inc. is Minnesota’s premier single source provider of Commercial Roofing, Heating, Cooling and Ventilation systems for residential and commercial customers.