As câmaras frias normalmente vão de 15 a -45oC. Acho que um walk-in freezer pode cobrir esse range de temperatura.

U.S. Cooler manufactures premium walk-in coolers, freezers, and combination units at competitive prices. These installations are used for all types of cold storage. Various applications include restaurants, convenience stores, floral stores, grocery stores, warehouses, schools, and institutions.

Our walk-in units are constructed to the customer's specific needs. Each panel is engineered to provide quick and easy assembly. All walk-ins are pre-assembled at our manufacturing facility to assure all locking mechanisms and panels join together. The end result is a quality, sealed walk-in unit when assembled at its final location. Our panels are then packaged to ensure a safe arrival at the job site.
http://www.uscooler.com/products-walkin-information.asp

I do agree that it can be either what Luiza or Marelene suggested.

This is another suggested translation for you to ponder.

Without much context, I should imagine that you may be talking about the industrial type cold or freezer rooms installed as facilities in a medium to large-scale enterprises.
www.freezetech.co.za/coldroom.htm
www.coldroomsolutions.com