What is an LGR dehumidifier?

A low-grain refrigerant (LGR) dehumidifier pre-cools incoming air below its dewpoint to condense more moisture per pass than a standard refrigerant unit. Effective below 40 grains per pound of air — the typical target for structural drying. Per IICRC S500 §12.5 equipment guidelines.

Category: Water Damage Reviewed: 2026-04-19 Source: IICRC S500 §12.5

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