couple weeks ago, all the sudden my heat stopped working. So I call Aire one, they said they would come in my house to look at it about an hour. I was so surprised to see a technician show up my door less than 45 minutes from the time I called them. The technician said the reason it was not working because the inside had too much duct and it needs cleaning. Within half hour, everything was back to normal. He also advice me to change the filter more frequent, to avoid any similar matters happen in the future. I find them very honest, helpful and profession. I would call them again if I can any future assistance of my furnace.