The size 4 Type J flange is typically rated for speeds up to 7

Durable Construction: Built to withstand the high temperatures and moisture levels typical of condensing boiler exhaust streams

and Intertherm "C" cabinets

this valve allows for versatile bulb placement to accurately monitor evaporator outlet temperatures

Rheem-Ruud 70-18631-01 Blower Wheel Els PW 17895 The size 4 Type JThe Rheem Ruud 70 18631 01 Blower Wheel is a precision engineered OEM replacement blower wheel designed for high static pressure applications in residential and light commercial furnaces and air handlers. Featuring a 9 1 2" diameter and 7 1 8" width, this double inlet blower wheel utilizes 43 blades and a convex disc design to optimize cfm output and maintain system static balance. The 1 2" bore configuration is tailored for direct drive blower