While many schools and businesses are closed because of the bitter cold temperatures, there are some jobs where you must report for duty even in the worst conditions.

Pioneer Heating and Air service technician, Chris Bowers, said he layered up before coming to work Monday. His job takes him outside to repair customers' heating units.

"This is the coldest I remember to be honest with you," Bowers said.

Before he could make his first call, he went to his maintenance shop to put on snow tires. He said he still felt his truck slipping on a few roads but is familiar with driving in the ice. He also had backup supplies in his truck.

"Nothing worse than having wet feet in the snow," he said.

Knoxville Fire Department also took time Monday to make sure they had cold weather equipment ready for their calls, including torches in case hydrants freeze.

Capt. Frank Mallory said with single digit temperatures, he and his team have to not only layer up, but mentally prepare.

"You know that obviously you're dealing with a different kind of day than a normal shift. And you set your mind up for different types of calls. Weather related, hypothermia, you prepare for it," Capt. Mallory said.

You might expect to to hear a few complaints out of Bowers or Mallory, but they say you won't hear it from them, because they know the importance of being there in an emergency.

"That's part of it. You sign up you know you're going to be working some holidays, you're going to have to deal with the weather, some nights you won't get to sleep. But you still love this job," Capt. Mallory said.

"When I go to a customer's house and they are elderly and have infant children to get their heat going for them there's no better feeling than that," said Bowers.

East Tennesseans are showing their appreciation for their hard work.

"Most everybody has a cup of coffee waiting on me. If I have to work outside they'll encourage me to come inside and warm up for a few minutes," Bowers said.

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