Honeywell IS20145-3343 C341825P01 Furnace Air Pressure Switch is a compact pressure‑sensing device used in furnace systems to monitor air pressure. It features a black and white housing and carries a 1.04" dimension in its specification. Identified by the IS20145-3343 and C341825P01 part numbers, this Honeywell switch is a recognized component for furnace air pressure sensing.
