Closeable Base Vent

Draw air in from the groundABS polymer 4" x 9.75" base vents allow fresh air to continually flow through your greenhouse. Mount a vent near the base in each corner for natural 'ground-up' cross ventilation. Close during colder weather to save heat. These vents are easy to install in your Solexx Greenhouse. Two base vents are recommended for every 4 feet of greenhouse length. Sold in sets of 4 or 6. Create healthy air flowRugged ABS polymer 4" x 9.75" base vents allow fresh air tocontinually flow through your greenhouse. Mount a vent nearthe base in each corner for natural ‘ground-up’ crossventilation. Close during colder weather to save heat.HV-20-4 Closeable Base Vent (4-pack) $59HV-20-4 Closeable Base Vent (6-pack) $79 Introducing the Closeable Base Vent, a must-have for any home or building. This innovative feature allows for proper ventilation while also providing the convenience of being easily closeable. With the Closeable Base Vent, you can ensure a comfortable and healthy envir