The MagnaTherm from Laars is a 95% thermal-efficient modulating-condensing boiler or volume water heater available in 2 million, 3 million and 4 million Btu/hr. sizes. It features a VARI-PRIME pump control that matches boiler firing rate to pump flow. Its on-board control functionality balances combustion, air flow and water flow to optimize boiler efficiency. The system has a sealed condensate trap that doesn’t need to be primed at startup, can accommodate up to 100’ of vent and meets NOx emission requirements.