I have used Hartz Heating & Cooling Inc. for two or three years now. They were here just a while back to do the routine service work on the furnace. They do great work, and their employees are friendly people, and easy to get along with. In fact, that is what I like most about Hartz Heating & Cooling Inc. They are so down-to-earth it is like having your neighbor come over to work on something. They are efficient and professional, but not arrogantly so. I am just very comfortable with them.