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LGR Dehumidifiers

LGR (low grain refrigerant) dehumidifiers use a pre-cooling stage to extract moisture at lower humidity levels than standard refrigerant units can reach, the technology specified in IICRC S500 structural drying protocols for water damage restoration. LGR units continue pulling moisture effectively when ambient RH drops to 40 to 45%, where standard dehumidifiers plateau. The professional standard for restoration contractors performing Class 2, 3, and 4 water damage drying.

Original price $2,443.00 - Original price $2,443.00
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Abatement Technologies AT250RS LGR Dehumidifier – 266 PPD, 400 CFM, 115V

Abatement Technologies
In stock

The Abatement Technologies AT250RS AquaTrap is a low-grain refrigerant (LGR) dehumidifier for water damage restoration — 266 pints per day at satur...

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Original price $2,443.00 - Original price $2,443.00
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XPOWER XD-125Li LGR Dehumidifier – 125 PPD AHAM, Bluetooth, 420 CFM

XPOWER
In stock

LGR Dehumidifier with 125-PPD Bluetooth Control and 40-Foot Auto PurgeThe XPOWER XD-125Li removes 125 pints per day at AHAM conditions (80°F, 60% R...

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XPOWER XtremeDry Mojave XDP1 DIY Drying System – LGR, 4 Air Movers, HEPA, 110V

XPOWER
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XPOWER XtremeDry Mojave DIY Pro-Drying System – Model XDP1 The XPOWER XtremeDry Mojave XDP1 is a pre-assembled water damage drying kit containing a...

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XPOWER XD-130Li LGR Dehumidifier – 125 PPD AHAM, 420 CFM, Bluetooth

XPOWER
In stock

XPOWER XD-130Li LGR Dehumidifier – 125 PPD AHAM, 420 CFM The XPOWER XD-130Li is a Low Grain Refrigerant (LGR) dehumidifier rated at 125 pints per d...

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Original price $1,112.00 - Original price $2,799.00
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XPOWER XD-85L2 LGR Dehumidifier – 85 PPD AHAM, 145 PPD Sat, 180 CFM, 115V

XPOWER
In stock

XPOWER XD-85L2 Commercial LGR Dehumidifier The XPOWER XD-85L2 is an LGR dehumidifier rated at 85 PPD at AHAM conditions (80°F/60% RH) and 145 PPD a...

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Original price $1,112.00 - Original price $2,799.00
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Original price $2,597.00 - Original price $2,597.00
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Abatement Technologies AT200C LGR Dehumidifier – 110 PPD AHAM, 470 CFM, WiFi

Abatement Technologies
In stock

110 PPD AHAM LGR Performance with Built-In WiFi and Remote MonitoringThe Abatement Technologies AT200C AQUATRAP removes 110 pints per day at AHAM c...

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Buy Low Grain Refrigerant (LGR) Dehumidifiers for Water Damage Restoration

LGR Dehumidifiers at US Cleaning Tools — Picks for Restoration Crews

The low grain refrigerant (LGR) dehumidifier lineup at US Cleaning Tools covers the capacity range IICRC-certified water damage restoration crews source through their work — from compact 80-pint portable units for small-room flood response, up through 280-pint commercial dehumidifiers with auto-purge pumps for whole-structure drying. The most-shipped LGR in the catalog is the XPOWER XD-125Li LGR Dehumidifier — a 145-pint workhorse built specifically for IICRC S500 structural drying in the 40–60% RH range where standard refrigerant units lose extraction efficiency. Every LGR dehumidifier ships factory-direct from US warehouses with full manufacturer warranty, pre-sale sizing support at (978) 295-7538, and 2–8 business-day standard shipping. B2B Net-30 terms are available for qualified restoration accounts.

How Low Grain Refrigerant Technology Outperforms Standard Refrigerant Dehumidifiers

Standard refrigerant dehumidifiers cool incoming air below its dew point to condense moisture — efficient when ambient relative humidity is above 50–60%, but extraction drops sharply as the air dries. A low grain refrigerant (LGR) unit adds a pre-cooling stage that uses cool exhaust air from the condenser to pre-cool the incoming stream before it reaches the evaporator. The two-stage process sustains meaningful extraction at 40–50% RH where standard units plateau, and lets a single LGR unit carry a structural drying job from saturation through the dry-standard finish. The IICRC S500 Water Damage Restoration Standard specifies LGR technology as the preferred dehumidifier type for structural drying because the complete drying cycle requires extraction at progressively lower humidity levels as the job progresses.

Related: Commercial Dehumidifiers · Desiccant Dehumidifiers · Refrigerant Dehumidifiers · Air Movers

Sizing LGR Dehumidifiers for IICRC-Compliant Drying

LGR capacity ratings in pints per day (PPD) are measured under AHAM test conditions at 80°F and 60% RH — conditions that do not reflect the lower temperatures and progressively declining RH of an active structural drying job. More useful sizing metrics are extraction rate at AHAM and at lower RH conditions (some manufacturers publish 60% and 40% RH curves), and the unit's certified LGR performance standard. Equipment quantity for a structural drying job is calculated from total volume of wet material, the target drying standard (typically return to pre-loss moisture content), and the number of days in the drying window — not simply room square footage. The EPA mold prevention guidance establishes that maintaining moisture content below mold-growth thresholds requires continuous extraction through the complete drying cycle.

Frequently Asked Questions

What does LGR mean in a dehumidifier?
LGR stands for Low Grain Refrigerant. An LGR dehumidifier pre-cools incoming air before it reaches the main refrigerant coil, allowing it to remove more moisture per cycle than standard refrigerant units. This makes LGR dehumidifiers significantly more effective in partially dried environments during water damage restoration.
What is the difference between a standard and LGR dehumidifier?
Standard refrigerant dehumidifiers are effective at high humidity levels but lose efficiency as air dries out. LGR dehumidifiers maintain extraction efficiency even at lower humidity levels (30–50% RH) — the critical range during the final phase of water damage drying. This allows faster, more complete structural drying.
Is an LGR dehumidifier worth it for water damage restoration?
Yes, for professional restoration work. LGR dehumidifiers dry structures faster than standard units, reducing job cycle time and the risk of secondary mold growth. Insurance adjusters and IICRC-certified restorers specify LGR units because the faster dry time minimizes total claim cost and reduces liability from incomplete drying.
How fast does an LGR dehumidifier dry a water-damaged space?
A properly deployed LGR dehumidifier can reduce moisture content in structural materials to acceptable levels within 3–5 days in most water damage scenarios. Drying time depends on material type, initial moisture level, airflow from air movers, and ambient conditions. IICRC S500 standard calls for monitoring every 24 hours.
What size LGR dehumidifier do I need for water damage restoration?
A general rule is one LGR dehumidifier per 100–150 square feet of affected area, paired with 1–2 air movers per unit. For larger commercial losses, calculate by cubic footage and material type. XPOWER's LGR lineup starts at 85 pints/day for smaller jobs and scales to 195+ pints for larger commercial losses.

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