Kolpak and Polar-Pak Walk-In Cooler Freezers offer many options. The Polar-Pak Walk-Ins have a self contained refrigeration package that can be located on the top or on the sides. The self contained refrigeration system does not need a drain because it has its own evaporation system. The Polar-Pak Walk-Ins are very easy to assemble and only need an electrical connection to start the operation. The Kolpak Walk-In can be used inside and/or outside of the building structure. They have remote refrigeration systems that can be located out of the kitchen area, thus eliminating the heat that is generated from the compressor. Zesco markets the basic Kolpak Walk-In system and will quote on combination walk-ins or any configuration of sizes and heights that you require.