For a basic walk-in, the components needed are: an evaporator, a condenser, insulated walls, floors, and ceilings, and an entryway, such as curtain doors. Here at Advanced Panel Products, we offer high-quality freezer wall panels that you can count on. We have panels with a wide range of thicknesses as well as customizable options too! Call us today for more information on our freezer and cooler panel products.