Cold Room Chiller Types and Systems

A cold room is the insulated walk-in enclosure itself — built from insulated panels with a prehung door — that maintains a controlled temperature environment. A chiller is the mechanical refrigeration unit that actively removes heat to achieve and sustain that temperature. In practice, a complete cold room chiller system combines both: the insulated walk-in box and the refrigeration equipment that keeps it cold. ELT Custom Coolers supplies the structural side of this system, including prehung swing and sliding doors, complete walk-in boxes, and accessories engineered for commercial cooler and freezer temperature applications.

A chiller is a mechanical refrigeration system that removes heat from a space or fluid to maintain a precise, low temperature — typically used in commercial or industrial cold storage settings. A room cooler, in the context of walk-in refrigeration, refers to the insulated enclosure (the walk-in box) combined with its refrigeration unit that keeps interior temperatures in a standard cooler range, generally above freezing. ELT Custom Coolers offers complete walk-in cooler boxes as well as prehung swing and sliding doors suitable for both cooler and freezer temperature applications.

ELT Custom Coolers offers prehung swing replacement doors for coolers and freezers, sliding doors with jamb sandwich frames for wide high-traffic openings, heated frame doors to prevent frost buildup, and PVC strip curtain accessories. Standard and plug frame configurations are available in both cooler and freezer temperature applications. An electric power sliding door option is also available for large-scale applications.

Walk-in cooler replacement swing doors are available in widths of 30", 32", 34", 35", 36", 38", 40", 42", 47", 52", and 60" with heights of 78", 80", 84", and 130". Walk-in freezer replacement doors range from 30"x78" to 60"x84". Sliding cooler doors range from 36"x78" up to 12'x12', and sliding freezer doors are available from 47"x78" to 96"x120". Custom sizes are also manufactured in-house for non-standard openings.

Not all freezer doors require a heated frame, but it is strongly recommended for high-cycle doorways and sub-zero environments. Heated frame and heated jamb options prevent frost buildup, ice-up, sweating, and door-stick that commonly affect unheated freezer door openings. ELT Custom Coolers offers standard, plug, heated, and heated plug frame options across the walk-in freezer door line.

Yes. ELT Custom Coolers offers a complete 8'x8'x8' walk-in cooler or freezer box that includes factory-built insulated panels and a prehung door. It is configurable for cooler or freezer temperatures and is ideal for new build-outs, ghost kitchens, small-format retail, c-stores, and commissary expansions where a full custom walk-in build is not required.

Every product from ELT Custom Coolers is UL Certified, DOE 2017 Compliant, and NSF Approved. These certifications mean the doors and walk-in systems meet Underwriters Laboratories safety standards, U.S. Department of Energy 2017 energy efficiency requirements, and NSF International food safety standards — helping operators cut compressor run-time, reduce utility costs, and stay code-compliant.