Equipment Information

Air Mover 
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  • Air Mover Classes

    • Class 1 – Ensure air movement across all wet surfaces (as little as one per 300 sq. ft. to one per 150 sq. ft.)

    • Class 2 – One air mover per 50-60 sq. ft.

    • Class 3 – One air mover per 50-60 sq. ft.

    • Regardless of class, ensure air movement across all wet surfaces.

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  • Air Mover Installation 

    • Clockwise rotation at 45 angle touching wall.

    • Inlet towards wall.

    • Turbulence air flow.

    • One for every 10-14 linear feet of wall space (more applicable for in place drying)

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Dehumidifier 

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  • Determine cubic feet first (cubic feet = length x width x height) When determining amount of dehumidification necessary, you must first consider cubic feet in the affected area.

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  • Types of dehumidifiers

    • Refrigerant and standard refrigerant (Works to 35 degrees, 35-40% relative humidity out)

    • Low Grain Refrigerants (Works to 28-33 degrees, 20% relative humidity out)

    • Desiccant Dehumidifiers (Works to below freezing, 0% relative humidity out)

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  • Determine type of water loss

    • Class 1 – no carpet and pad

    • Class 2 – carpet and pad

    • Class 3 – Carpet and pad with water from above or water more than 24“ up walls

    • Class 4 – Specialty focus on bound water

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  • Refrigerants: Cubic feet/Flow chart = AHAM pints necessary

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  • Desiccants: AEH x Cubic feet/60 = CFM of process air necessary

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  • General rule: Large room-One refrigerant dehumidifier per 4 air movers. Multiple Small Rooms-one refrigerant dehumidifier per 2 air movers.

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  • Pint Removal: CFM x Grain Depression 71 = pints