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Ideally a root cellar shouldIdeally a root cellar should have an inlet and an exhaust vent. 4-inch PVC pipes work well. Put the exhaust pipe close to the ceiling and the intake pipe at floor level in the opposite corner. Type "root cellar vent" into your browser to find specifics on how to install vents.

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?