In 1974, the founders of HCR set out to find a better solution for moving traffic through cooler and freezer doors. Using a completely fresh engineering approach and the principles of psychrometrics, the refrigeration engineers at HCR developed new technologies that poineered the re-circulatory air door industry.
Today, with more than 30 years of field experience, HCR has gone from the drawing board to application, from a basic idea to reality, and has proven itself with thousands of successful installations worldwide, and inside the facilities of the largest, most demanding and cost-conscious grocery and food distribution centers, food processing plants and refrigerated warehouses.
Re-Circulatory Air Doors
HCR Air Doors Remove All Obstacles
HCR makes the appeal of an unencumbered, wide-open doorway for your workers to move about freely and efficiently a reality...removing all obstacles from your path. The benefits of HCR in your facility are visibly dramatic through the elimination of frost and ice and additionally remarkable in increasing productivity. When applied to large freezers with high-traffic or problematic doors, fully operational HCR units are essentially the same as adding refrigeration capacity.
Merchandise movement is significantly increased and HCR units help expand critical storage space. Safety concerns are reduced due to the clear visibility of the open doorway, the removal of frost and ice on the floor, and the elimination of moving door parts. HCR makes the appeal of an unencumbered, wide-open doorway for your workers to move about freely and efficiently.
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HCR Test Lab Generated Thermal Video
Test Lab generated thermal video showing in real time what happens before and after the HCR single recirculatory air door is turned on.
Psychrometrics is the study of moisture in the air and the changes in air conditions such as temperature, absolute and relative humidity, and moisture content. Nowhere are the effects of psychrometric principles more evident than in a cold storage environment.
According to the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), within seconds after a door is open a natural air exchange occurs. When there is a doorway between two rooms with considerable or extreme temperature differences, the natural air exchange translates into significant cold air loss and warm air and moisture infiltration. Further, infiltrating air can account for up to 50% of the refrigeration load in a cold storage facility.
Rigid doors work well where traffic is low and open and close cycles are few and of short duration, or when the room temperature differences are not extreme. But there comes a point where a rigid door no longer serves as the most cost-effective solution. The more the door is opened, the more air exchange takes place and the doorway is subject to all of the problems that would occur as if there were no door at all.
HCR applies the principles of psychrometrics by first elimating the moving door that is constantly opening and closing replacing it with a wide open doorway vestibule that provides a continuous air barrier between rooms, preventing infiltration by while capturing and conditioning the air to a non-frost non-fog producing state.