making it suitable for large commercial boiler banks

Unlike automatic switches

Direct Update: Optimized design replaces the older CBK2PD240VA060S with identical mounting footprints

What is the difference between the 22-133 and the MCS-G

"drop-in" replacement during service calls

Venstar VST4800 Tstat 30067439-890 making it suitable for largeThe Venstar VST4800 Explorer is the high performance multi stage programmable thermostat designed specifically for professional contractors managing commercial HVAC systems. Engineered to be the direct replacement for P374 2200, P374 2800, VST2800, and T2800 models, this unit provides seamless 3H 2C compatibility for gas electric and heat pump installations. As a technical professional, you will appreciate its non volatile memory and Dry Contact