Over the years Hartz Heating & Cooling Inc. has provided prompt, efficient service. I have had no issues with my air conditioning and heating unit since they installed it new three years ago. They perform service maintenance for me twice a year. They go above and beyond with their service. Everything that I have asked of them they have accomplished. I have referred them to my neighbor who also had them install a new air conditioning and heating system. I think they do outstanding work even if you get a different technician, they always do a very good job! I highly recommend them!