Purchased my WoodMaster Model 3300 July 2004 and did the install myself. The unit is heating a 2080 sq ft house with heat exchangers for the 3 zone hot water baseboard heat system and the hot water heater tank. Temp last night 12 below and right now 5 below. Just came back in from feeding some wood and thought "God I love that WoodMaster". Almost owned 10 years and the only maintenance was a busted bolt on the flue control.Wish I could say other stuff is built as well...cars, RV's, dental crowns, etc. Just want to say THANK YOU, best $4 k I've every spent.