We needed a central air conditioning unit as well as an electronic air filter for our furnice, and the salesman seemed to really know his business so we went with them. Also, we had heard about this company so were familiar with the name. HUGE MISTAKE. They installed it, but when we continually had problems with it, they would not come back. They sold us an "oversized" a/c unit for our 4,000 square foot house (one that was good for up to a 6,000 square foot house) yet we were freezing on the ground floor and basement, and sweltering on the 4th floor. They had set up the system originally, so we felt they should come back and figure out what the problem was with the air flow and then fix it. They wouldn't come back. We called and called, and they would promise someone would be there on a certain day, only to have no-one show up. Stay away from this company.