SKYMARK Air-Cooled Self-Contained units are manufactured using high-quality products and processes and save energy for our customers. Convenient for installations when packaged indoor equipment are needed or required, units are installed easily on the perimeter of the building for condenser airflowSKYMARK Water-Cooled Self-Contained units are manufactured using high-quality products and processes and save energy for our customers. Convenient for installations when packaged indoor equipment are needed or required, units are installed easily by connecting to a building water loop and ducting supply air to the conditioned space.