Shur Farms Frost Protection® has over 20 years of experience in frost protection science and cold air removal technology. Having been growers ourselves, we understand the challenges of designing an effective and affordable frost protect system. We designed and installed the first North American cold air drainage system in the late 1990s and began manufacturing and marketing the Cold Air Drain® in 2001. Since then, we have installed thousands of units protecting trees and vines, making us the leader in cold air removal. Ongoing advancements to the powerful Cold Air Drain® have made it the most fuel efficient, quiet, and cost-effective method of active frost protection available.