The MagnaTherm HTD series of condensing boilers and volume water heaters boasts real time O2 trim compensation that maintains ideal air-to-fuel ratios, full 20:1 turndown on all sizes to match varying load profiles and the Laars Linc icon-driven control system. On board each boiler is the Laars Vari-Prime pump control that seamlessly matches firing rate to boiler pump flow. Laars Linc intuitive control system with color touchscreen has an easy-to-navigate control structure that displays key performance measures, a quick start option and a USB input for parameter upload. Available in six sizes from 1600 to 4000 MBH, Laars MagnaTherm HTD units have stainless steel heat exchangers and deliver AHRI certified 95% thermal efficiency. Laars.