a dedicated vent line is typically not required

and LGB series units

polytubing barbed fittings for straightforward integration into existing T-4000 series footprints

Energy Efficiency: Highly efficient motor design helps lower operational costs while maintaining peak system performance

Maxitrol M520B-3/4 Gas Valve 320720-756 a dedicated vent line isThe Maxitrol M520B 3 4 is a specialized 3 4" NPT Modulating Gas Valve engineered for technical precision in negative pressure (pull through) and indirect fired atmospheric burner applications. As a core component of the Selectra electronic gas flame modulating system, this valve provides instantaneous, non fluctuating temperature control without the need for mechanical butterfly valves or motors. Built with a corrosion resistant brass valve body and a