FREEZER
Model CAC - Conditioned Air Curtain
Designed for conditions where traffic level is extreme, but humidity is not extreme.

Model ECAV - Frost Free Freezer Vestibule
Designed for freezer doorway traffic and humidity situations most often encountered in the industry

Model DCAV - Dual Conditioned-Air Vestibule
Designed for the doorway traffic and humidity situations that formerly called for field constructed, dual passageway vestibules.

Model 3CAV - Triple Conditioned-Air Vestibule
Designed for doorways with extreme temperature differences and very high traffic flow.

Model ECAV/CAC
Designed for high traffic doorways that experience extreme temperature differences from sub-zero direct to ambient conditions.

Freezer Doorway Models
Although frost and ice elimination is visibly dramatic for all the HCR freezer doorway models, productivity improvement can be even more dramatic. The benefit to merchandise movement upon cleaning-up and freeing-up doorways often extends to space utilization as though a sizable freezer addition has been made. Equally dramatic are the cases where frost-clogged coils near doorways are found. Making them fully operative is essentially the same as adding refrigeration capacity.

Frost elimination is by means of a special air conditioning process, which mixes warm, moist infiltration air with corresponding quantities of cold, dry ex-filtration air, and adds sufficient sensible heat to bring the mixture to a point where neither airborne ice crystals nor ordinary fog can form.

The sensible heat source is usually electricity where the requirement is small and waste-heat reclaim (free hot gas) from the refrigeration system where the requirement is large. The use of sensible heat is identical in principle to the use of reheat for humidity control in higher temperature rooms. The amount required depends upon doorway size, model selected, and the levels of temperature and humidity that occur on each side of the opening.