We recently had our winter furnace checkup with Shawn (service tech). He was very professional and thorough with his service checkup. Explained the operation of the heat pump and readings as he checked various components. He asked when he arrived and agin before leaving if we had questions or concerns with the furnace. He used shoe covers to protect the rugs in the house from dirt. This was the 2nd check of their 2-check, summer (AC) and winter (heat pump), maintenance plan so there was no charge for the call. We are are always impressed and pleased the the people and service we receive from Charlie's.