TheRaypakXtherm product platform has been expanded up to 4 million Btu input. The Xtherm line has seven model sizes starting at 999 MBtu input. Also standard is the new Versa IC fully integrated control system with built-in Modbus BMS port and cold-water protection functionality. Optional BACnet and LONworks gateway modules are available. Cascade up to four boilers and utilize the built-in equal runtime rotation, which allows rotation of the starting boiler so all units get equal runtime. The platform features up to 98% thermal efficiency along with a turndown ratio up to 12:1, depending on model size. Low-lead bronze headers are standard and the unit can be vented with stainless steel or PVC with the D-32 option or polypropylene with the D-33 option.