The Burnham Wetback Packaged Boiler Can Save You Thousands of Dollars Over the Life of Your Boiler. Burnham quality engineering takes maximum advantage of long-term energy and maintenance efficiencies. Unless you take those efficiencies into consideration along with price when you choose a boiler, you can be in for enormous hidden costs. The Series 3 matches burner to boiler, providing a fuel efficient low-maintenance package. It takes maximum advantage of long-term energy and maintenance efficiencies. Boiler Cost is Not Just a First-Year Proposition.Long after the installation is paid for, fuel, maintenance, and repair costs continue and can increase over the years. Burnham Packaged Boilers are designed to minimize these significant, ongoing ownership costs. That's Burnham's High Life-Cycle Efficiency!While most competitive boilers can give fuel-to-steam efficiencies of 80% or over-when they are new-how consistently can they be expected to maintain this level? Burnham wetback boiler performance will not drop due to deteriorating rear refractory, leaking door baffles and seals, and heat-stressed rear tube sheet as can happen with some drybacks: the fact is that easy access is a necessity for those with heavy refractory, as they need frequent, expert maintenance.