How to Choosethe Right

Commercial DehumidifierWhen you’re fighting a battle against humidity, choosing the right equipment for the job makes all the difference. The type of drying

project, size of area and extent of moisture all help determine what kind of commercial dehumidifier you need.

EQUIPMENT PROTECTION

Matching up the right dehumidifier to your project depends on anumber of factors. Here are the key specs to look for:

Sources: Sherwin-Williams Company, ASM International, San Francisco Chronicle, National Flood Insurance Program, Institute of InspectionCleaning and Restoration Certification, Wikipedia, Centers for Disease Control, wikiHow, Energy Star

A dry environment is often needed for buildings with sensitive equipment, including:

Warehouses MedicalFacilities

ServerRooms

The type of dehumidifier should depend on the task at hand. Temporaryclimate control can serve many functions. Examples include:

DRYING METHODHow the dehumidifier removes moisture from the air.

Desiccant: Moisture absorbingmaterials draw humidity from the airwithout altering air temperature and create a stable environment.

Heat: A heating system raises the airtemperature to remove moisture. Anenergy-efficient option for manyindustrial applications.

Refrigeration: Coolant is used toreduce humidity. Can achieve dramatic changes in moisture level whenincorporated into a more robustdesiccant dehumidification strategy.

WATER REMOVAL CAPACITYHow much water a refrigerant-based dehumidifier unit can remove from the air on average

in 24 hours. Measured in: pints.

AIR FLOW VOLUMEHow much air moves through the dehumidifier over

time. Measured in: cubic feet per minute (CFM).

Calculating Air Flow Volume:

STEP 1:

Determine how many times the air

needs to cycle through the unit

every hour (ACH).

80-90% 90-100%

60

-70%

70-80%

relative humidity3 AC

H

4 ACH 5 ACH 6 ACH

STEP 3:

Cu. Ft.x

ACH

=

Multiply the area in cubic feet by

the ACH.

STEP 4:

60 = CFM

COVERAGE AREAHow much space the unit can dry

effectively. Measured in: square feet.

OPERATINGTEMPERATURE

RANGE

Environments colder than 65° F require a dehumidifier specified for use at lower

temperatures.

< 65º

ENERGY FACTOREnergy efficiency, or volume of water removed per amount of energy used.Measured in: liters per kilowatt-hour.

Ideal temperatures for getting the bestperformance from the dehumidifier.Measured in: degrees Fahrenheit.

An energy-efficient drying system cansave up to 40% on electrical

requirements at the project site.

40%

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Preparing metal surfaces for anti-corrosioncoating requires a well-regulated environment.

80%Poorly regulatedsurface conditionscause 80% of allcoating failures

Controlling the surface environment while coating can save upto 20% in futuremaintenance costs

20% $Proper application of coatings could save the U.S. economy nearly $100 billion a year

SURFACE PREPARATION

MOLD REMEDIATIONDehumidification stops mold growth in its tracks.

In dampconditions, mold begins to spread

within

48hours.

Preventing mold growth requires a relative humidity level consistently below 50%

What Do You Need aCommercial Dehumidifier For?

Important Specs When Rentinga Commercial Dehumidifier

STEP 2:Determine the size of the area in cubic feet.

The quicker a water-damaged building dries, the less costly it is to repair.

Wood with a moisture content above

16%runs the risk of dry rot and structural damage

Accelerated drying can cutwater damage restorationcosts by up to 70%

WATER DAMAGE RESTORATION

Capacity Needed:

Moderately Damp

If construction is taking place in a dampenvironment, moisture and humiditycan compromise structural integrityand prolong drying times.

Without dehumidifier: 24 hours

With dehumidifier:12-15 hours

CONSTRUCTION

At 98% humidty jointcompound can take up to12 days to fully dry

www.PolygonGroup.com/US

Drying times for drywall mud in a humid environment

Floods racked up more than

in insurance claims from 2014 to 2015

$3.5 Billion a year

Capacity Needed:

Extremely Wet

Divide by 60. This is the CFM to look for.

10,000 sq. ft.

5,000 sq. ft.

2,500sq. ft.

20,000 sq. ft.

26pt.

46pt.

166pt.

86pt.

289pt.

149pt.

79pt.44

pt.

Y”X”