Reznor 46171 Shutter Els PW 17895 the SUPR is designed to

the SUPR is designed to replace almost any 3-terminal or 5-terminal potential relay regardless of the brand or orientation

This HVAC voltage step-down transformer is a direct drop-in replacement for common industry models

"plug and play" installation into compatible HVAC wiring systems

providing a direct physical and electrical match for the legacy S1-024-35800-000 model

it ensures factory-spec fitment and long-term performance stability in professional applications

Reznor 46171 Shutter Els PW 17895 the SUPR is designed toAs a seasoned technician, you understand that achieving the precise stoichiometric ratio is critical for the long term reliability of Reznor XL125 and XL140 unit heaters. This replacement Reznor 46171 Burner Air Shutter is the exact OEM component required to calibrate primary air intake, ensuring a clean, stable flame and preventing the soot accumulation that can degrade heat exchangers. Fabricated from high durability aluminized steel, this die