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Commercial Dehumidifiers

Commercial dehumidifiers for water damage restoration, construction drying and facility moisture control. LGR models for structural drying, desiccants for low-temperature work, and high-capacity units for large facilities.

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Ebac RM4500 Whole House Ducted Dehumidifier – 150 PPD, 115V, DualCool, 10570RG-US

Ebac
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Ebac RM4500 10570RG-US Dehumidifier – 150 PPD, DualCool Technology The Ebac RM4500 10570RG-US is a large-capacity restoration dehumidifier removing...

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Ebac RM4500-H Whole House Ducted Dehumidifier – 150 PPD, WiFi Smartphone Monitor

Ebac
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Ebac RM4500-H Dehumidifier – 150 PPD with Smartphone Monitoring and Electronic Humidistat The Ebac RM4500-H adds smartphone-compatible monitoring a...

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Namco P646-150 150-Pint Crawl Space Dehumidifier – Auto Pump, R-410A, 2,600 sq ft

Namco Manufacturing
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Namco P646-150 150-Pint Crawl Space Dehumidifier – 2,600 sq ft Coverage with Auto Pump The Namco P646-150 removes up to 150 pints of moisture per d...

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Commercial Dehumidifiers for Restoration, Construction, and Facility Drying

Which Technology Handles Your Temperature Range?

Commercial dehumidifiers split into refrigerant, LGR, and desiccant units, and temperature decides which one belongs on a job. Refrigerant units lose efficiency below roughly 65°F, once the coil temperature approaches the dew point of the incoming air and condensation drops off. LGR units pre-cool the incoming air to push that threshold lower. Desiccant units skip the coil entirely and run a silica gel or lithium chloride rotor, which keeps removing moisture at 40°F and below. ASHRAE's standards and guidelines cover the psychrometrics behind the split.

Why Does a 150 PPD Unit Remove Less Than 150 Pints?

Pint-per-day ratings are tested at 80°F and 60% relative humidity under AHAM. Field conditions rarely match the test bench. A unit rated 150 PPD removes closer to 90 to 110 pints in a 60°F basement at 55% RH. Restoration crews working to IICRC S500 size their equipment on air volume and target grain depression, not on the label figure.

Related: Refrigerant Dehumidifiers · Desiccant Dehumidifiers · LGR Dehumidifiers · Industrial Dehumidifiers

What Matters on a Multi-Day Drying Job?

Continuous drainage matters more than tank size once a job runs past a single shift. A gravity hose or a built-in condensate pump removes the overnight stop to empty a tank. Power is the other constraint. Portable LGR units pull 6 to 12 amps, so two of them on one 15-amp circuit will trip it. EPA guidance on water damage puts the structural drying window at 24 to 48 hours.

Frequently Asked Questions

What is the difference between commercial and industrial dehumidifiers?
Commercial dehumidifiers are designed for occupied spaces — offices, gyms, retail — where temperature control and noise matter. Industrial dehumidifiers handle more demanding environments: warehouses, manufacturing plants, flood remediation. Industrial units typically run at higher capacities (150–700+ pints/day) and are built for continuous, unattended operation.
What size dehumidifier do I need for a 1,000 square foot space?
For a 1,000 sq ft space with moderate humidity, a 70–90 pint/day dehumidifier is sufficient. In high-humidity environments or spaces with poor ventilation, step up to 100–130 pints. Ceiling height matters too — calculate cubic footage (length × width × height) for more accurate sizing.
What humidity level should I set my dehumidifier to?
Set your dehumidifier to 40–50% relative humidity for most commercial applications. Warehouses and storage facilities: 45–50% to protect inventory. Water damage restoration: reduce to 30–40% until affected materials reach acceptable moisture content. Below 30% can dry out wood framing and cause structural issues.
What are the different types of commercial dehumidifiers?
The three main types are refrigerant (most common, works above 65°F), desiccant (uses absorbent materials, effective down to -4°F), and LGR (low grain refrigerant — extracts more moisture per cycle, preferred for water damage restoration). Each type suits different temperature ranges and moisture loads.
How long do commercial dehumidifiers last?
Commercial dehumidifiers from industrial brands typically last 7–12 years with proper maintenance. Key maintenance: clean or replace filters monthly, check drain lines every quarter, and inspect the condensate pump annually. Units with stainless steel housings and commercial-grade compressors outlast residential-grade units by several years.

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