November 2021

Master-Bilt® Refrigeration News & Product Information


Refrigeration U: Cold Wall Evaporators

With refrigeration equipment, it is important to have as much usable interior cold storage space as possible. More space means more product storage and merchandising, not to mention increased cost effectiveness for the owner. Evaporator coils, while a necessary part of a refrigeration system, tend to take up part of that valuable space. However, in some cases, cold wall evaporators offer a way around the issue.

Cold wall evaporators, mostly used in ice cream dipping cabinets and milk coolers, are different from conventional evaporator coils. Simply stated, conventional coils consist of a metal housing with metal refrigerant lines inside and aluminum fins and fans to disperse cool air. On the other hand, a cold wall evaporator consists of foamed-in-place refrigerant lines wrapped around the outside of the inner compartment of a freezer or cooler.

In addition to taking up less space, cold wall evaporators provide even temperature throughout the freezer with no air blowing across stored product which can lower its quality.

Other benefits include:

  • Superior energy efficiency over systems containing an evaporator coil
  • Fewer mechanical parts for longer service life
  • Better temperature maintenance in high humidity environments
Cold wall evaporator refrigerant lines are foamed in place and wrapped around the outside of the cabinet interior.

Cold wall evaporator refrigerant lines are foamed in place and wrapped around the outside of the cabinet interior.