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1717 SE 13th St, Brainerd, MN 56401, USA
“They were quick to respond to my needs. Tech was knowledgeable and able to fix our boiler same day for a reasonable price. Absolutely fabulous customer service! Highly recommend using their HVAC servi...”
“I went to Thelen on a reference from another company. My dad needed help with his fuel oil furnace and they where happy to help and give me advice. It is clear to me that this company cares about peop...”