I called Halls Heating and Air Service several years ago after my downstairs unit had been out for quite some time and having had several companies give me estimates to repair. I didn't quite trust what I was being told. A friend recommended Halls. They fixed the unit for half the cost I had been quoted, they are always on time, courteous, professional and clean up so that you never know they were there! I haven't had a problem since. They now do my service. I have recommended them to several friends who have thanked me for the recommendation. I won't use any other company for my heating and air.