This Burnham Commercial Hydrostat Plus Atmospheric Gas is a high-efficiency, multi-functional control system designed for use in heating applications. It combines the functions of a hydrostatic pressure regulator, temperature limit control, low water cut-off, and circulator control into one compact unit. The system operates on natural gas and has an atmospheric venting mechanism that eliminates the need for an external vent. It features a digital display for easy monitoring and troubleshooting, as well as an adjustable differential setting for precise temperature control. The Hydrostat Plus Atmospheric Gas is compatible with most boiler systems and is designed to improve overall system efficiency and reliability.