drop-in replacement for Utica MGB series boilers (sizes 50 through 250) and various Dunkirk counterparts

the White-Rodgers 90-341 is a functional equivalent and a common cross reference for the R4222D1013

and ecocirc 20-18 models

preventing dust

Cleveland Controls AFS-271 Switch drop-in replacement for Utica MGBThe Cleveland Controls AFS 271 is a professional grade air pressure sensing switch designed for critical proving switch applications in HVAC and energy management systems. This adjustable air flow switch offers a precise set point range of 0. 05" to 2. 0" w. c., making it an essential component for monitoring positive, negative, or differential pressure in commercial burners and furnaces. Engineered with a durable plated housing and a silicone