I have a fire damper system that needs to be replaced/repaired. There are 6 dampers in a controlled boiler type room where the main hvac systems is housed. I need to get some explaination and also some expert advice on the pricing I have been quoted. Right now, to replace 3 dampers and inspect, replace the other 3 fusible links, I have an estimate of $Removed. the biggest issue is the tearing out the duct work and replacing it, Is this reasonable?