Best

Best built-in hood inserts (PK22 / PKEX22 iQ12 and HBN22 True iQ successor): quick sheet

Best (Broan-NuTone premium brand) built-in power-pack inserts that mount inside a custom wood or plaster hood: PK2230 (27-3/4 in nominal 30), PK2239 (36-1/2 in, sold as 36/39) and PK2245 (43-7/16 in, sold as 45/48) with the internal dual iQ12 blower, and PKEX2239 / PKEX2245 versions with no internal blower (paired only with Best in-line ILB3/ILB6/ILB9/ILB11 or exterior EB6/EB9/EB12/EB15 blowers). PK22 is now listed by Best as discontinued; its successor is the HBN22 series (HBN223012SS, HBN223612SS, HBN224812SS) with the True iQ blower, touch slider, Wi-Fi/Bluetooth and SmartSense Pro. Model/spec label: inside the power pack (on HBN22 next to the HVI label, behind the filters); the replacement filter part number is on a label inside the power pack. Not covered: Best wall chimneys (WPP1, WC34IQ) and CP5/CP57 Potenza inserts, for which no fetchable manual was found. Search terms: Best PK22, PK2230, PK2239, PK2245, PKEX2239, iQ12 calibration, Best hood 4 speed lights flashing, Best HBN22, True iQ, Heat Sentry fan won't turn off.