WC‑15 Variable Speed Fan Controller – 5A, Dial Control with On/Off Switch, RFI Filter, Brushed Aluminum Plate Width_24in + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 28" x 34" OR 34" x 28" duct opening (measured at the opening)

the second number represents the width

+ Product Details Size – 12"w X 12"h pleated MERV 2 filter for HVAC return filter grille - 12 Pack

Actual Filter Size – 29 3/4"w x 11 3/4" x 1"

with actual outer dimensions of 36

WC‑15 Variable Speed Fan Controller – 5A, Dial Control with On/Off Switch, RFI Filter, Brushed Aluminum Plate Width_24in + Product Details Perfect Fit+ Product Details Compatible replacement for WC15 series speed controllers Variable fan speed dial with integrated on off switch Rated for 115 VAC, 50 60 Hz operation with 5 Amp max load Built in RFI (Radio Frequency Interference) filter for clean operation Adjustable minimum speed via internal trimpot Brushed aluminum wall plate with matching silver control knob Includes mounting hardware and standard 6 pre stripped wire leads Fits standard 2 4