Every Growing Dome comes with standard accessories to withstand high wind loads. The small to medium size Growing Domes (15′, 18′, 22′, and 26′) come standard with automated greenhouse vents. The 26′ Growing Dome may be upgraded to a solar attic fan in place of the top two vents. The 33′ Growing Dome comes standard with one solar attic fan, and the 42′ Growing Dome comes with two solar attic fans. Attic fans are used in place of automated greenhouse vents on the 33′ and 42′ Growing Domes because the polycarbonate triangles are too large for vent openers to safely operate in high winds.