Adjustable from 23-44" when measured from roof (not ceiling) to top of furnace. This 4000 series roof jack is used on almost all Coleman gas furnaces including CGAT, COAS, COAT, DGAA, DGAH, DGAM, DGAT, DGPA, DGPH, DGPT, DLAS, 7900 and 7600 models.
For older furnaces, check your data plate or e-mail us. Swivel flashing allows installation on roof pitches ranging from 0/12 to 5/12. Installation instructions included. Outside pipe is 8-1/4" which fits over about an 8" pipe on the furnace. Inside pipe is 5-1/4" which fits over about a 5" pipe on the furnace. Shipping box size is 16x16x42.View instruction sheet.