The Ideal-Air Gro-Sok transition is designed to be used with the Gro-Sok for optimal air distribution. They are lightweight, draft free, condensation resistant, machine washable and anti-microbial. They are quick and easy to install. With “no noise technology” you will be assured of quiet operation. Ideal Air has designed the Gro-Sok using heat load and duct design technology to provide even and efficient air flow. You’re assured of getting the greatest air distribution benefits more efficiently, which reduces operating costs. Proper duct and equipment sizing is critical to a successful environment. These transition systems are designed to fit specific air conditioners/heat pumps, as noted below.