The Laars MagnaTherm HTD condensing boiler and volume water heater comes standard with feature-rich functionality, such as full 20:1 turndown on all sizes, Laars Tru Trac O2 trim system with real time, electric fuel-to-air ratio combustion control and the intuitive to use, icon based Laars Linc control system. MagnaTherm HTD units are AHRI rated as 95% thermally efficient, are natural gas fired and are available in sizes from 1.6 to 4 million Btu/h. LAARS | | Booth #1343