The super efficient EnduroTi is a commercial condensing boiler with a hyper-jet combustion system. It is manufactured out of an extremely durable stainless steel and titanium blend to resist corrosion and last longer. With up to a 93% thermal efficiency and 10:1 modulation the EnduroTi has special corrugated horizontal flue passages. The reverse flame combustion chamber heats large amounts of hot water for superior heat transfer. The EnduroTi is CSD compliant and up to 8 units can be cascaded.