condensing unit for cold room  

https://www.kendallcool.com/blog-post/how-to-install-the-condensing-unit.html

Condensing units are common temperature control devices found in refrigerators, air conditioners, heat pumps, and chillers. They move energy in the form of heat by compressing a gas called "refrigerant", which is then pumped into a coil system and uses the air around the coil to heat and cool the space. Electronic controls, fans, pumps, and coils manage the work of the condensers.

Condensing units ensure practicality, especially for commercial and industrial facilities. In addition to being versatile, they offer safety and excellent performance.