I have 1998 Burnham v-75 replaced burner 2 seasons ago, rebuilt fire box 3 years ago- today heat exchanger is leaking (steam system) Furnace man says its time to replace the furnace $5,500-7000 installed. He says that Burnham uses imported assemblies in their furnaces from China and India to save $$$ and make $$$. With the $$$$$ they are making they can afford the occasional law suit. Unfortunately many other manufacturers are following the same path. Big business (US economy) can not survive producing a product that last 30 years — failures are designed into the products to keep people employed — That's the way it is and it's only going get worse, everything the american consumer needs and DEMANDS will only be available as long as we agree to pay up. Remember when TV was free? change the technology, convince the public it's great and everyone will eventually forget what they had and lost. It's called "free enterprise". Never have so many been controlled by so few.