We are located in Fort Wayne, IN and our service covers northern Indiana and north western Ohio. USSI is a authorized service center for Nordyne (Intertherm/Miller), Coleman, and Rheem equipment. Being a authorized dealer allows us to handle any and all warranty repairs. Replacing your furnace filter regularly will increase the life of the furnace tremendusly, and can eliminate the need for a yearly tune up. Ninety percent of all service calls are handled on the same business day. Our service is offered 24 hours a day, seven days a week.