The M control lends itself ideally to conditions requiring a great deal of stability and accuracy|Designed for settings from 0.01 to 0.1 in, the field M control is recommended for oil or coal-fired residential heating applications|The type M features an infinitely variable screw adjustment, permitting an extremely fine instrument setting|The M employs side wings to control air direction with gate curvatures designed to compensate for differences in horizontal and vertical settings|Control size 8|50.3 sq-in nominal capacity|7 to 8 to 9 in recommended pipe diameter|22 to 28-1/4 in recommended pipe circumference

cULus Listed