Specs and Docs

NeoTherm® LC

Commercial Modulating Condensing Boiler and Volume Water Heater

Innovative technology and user-friendly features are at the heart the NeoTherm LC. The NeoTherm LC is a direct vent, sealed combustion, condensing and modulating hydronic boiler. These compact 1.0 million and 1.2 million BTU/h workhorses are powered by a dual fired ASME stainless steel water tube heat exchanger resulting in 10:1 turndown and thermal efficiencies as high as 99%. Setup, operation and diagnostics are made easy with the NeoTherm LC’s large color touch screen display.

The advanced NeoTherm LC control system includes a cascading feature that allows for up to four boilers to be lead lagged with onboard controls. Up to eight NeoTherm LC boilers can be lead lagged when coupled with M4 and M4EXT controllers. This results in a modulating heating cell of up to 9.6 million BTU/hr with a combined 80:1 turndown. 


Powering the NeoTherm LC is a dual fired heat exchanger that has two equally
sized burners surrounded by coiled water tubes. These burners can modulate
independently of each other to maximize fuel utilization. An added redundancy feature of the dual burner design is if for some reason one of the two burners were to fail the other will still be available to provide heat.

Communication with Building Automation Systems happens easily via a built-in Modbus protocol included with all NeoTherm LC boilers.