OEM Harman Differential pressure switch 3-20-6866

Fits: Harman Accentra FS (Cast), Accentra Insert, Accentra 52i, Advance, HF60, P35i, P38+, P43, P61, P61A, P68, PC45 PF100, PB105 XXV, Heatilator Eco-Choice BH60, BH105, and BA100

Harman
3-20-6866
3-20-9301
3-20-3433