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- All Revolv RG1/ RO1, MG1E downflow furnaces require roof jack vents to complete the installation. They provide the furnace with fresh air for combustion and expel flue gasses to outside your home
- Suitable For Use WithRG1-RG7, RO1, M5SB, MG1E FurnacesTypeAdjustableExtension24-47 inFlue Connection5 inManufacturerStyle CrestManufacturer #903660Pitch0/12