The 903664 Roof Jack Flue Assembly is compatible with M1 Series Hot Surface Ignition Furnaces, M1 Series Gas Gun Furnaces and M5 Series Oil Gun Furnaces from Intertherm. Check manufacturer recommendations for other models to ensure compatibility. Roof Jack Vents are used to provide furnaces with fresh air for combustion and vent out flue gasses. This Flue Assembly features a 35 in. to 63 in. extension when measured specifically for the roof and a 2.5/12 slant (pitch).
