1G Block 4U

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Last updated 11:47 PM on 6/29/26
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4 Terms

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Temperature Range

Low Temperature Below 0 F

Medium Temperature Between 0 F and 30 F

High Temperature Above 30 F

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Refrigerants

Low Temperature R404A, R507, R290

Medium Temperature R-134a, R407C, R448A, R449A

High Temperature R-22, R410A, R32

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Applications

Low Temperature Commerical freezers, industrial freezers, cold storage warehouses

Medium Temperature Refrigerated display cases, walk in cooler, refrigerated transport

High Temperature Air conditioning systems, heat pumps, chillers

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1G

Difference in refrigerants and applications in low, medium, and high temperature refrigeration systems