Dectron, Inc. March 2012
DSH/DSV/RSH/DBH/RBH Series Dehumidifier Owner’s Manual
Building Construction Air Distribution
Data subject to change without notice.
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DECTRON
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1. Locate the return air inlet 8 to 15 ft. (2.5 to 4.5 m) up an interior wall. Allow for proper air circulation
and arrange to prevent blocking of the inlet. Where an elbow is required, use acoustic insulation up
to the elbow to eliminate air movement noise. (See also Installation - Duct Design guidelines.)
2. Diffusers must be linear and must cover the entire width of each window.
3. Blanket each entire window with supply air.
4. A vapor barrier in all walls and ceilings is necessary. Dehumidification will not prevent the condensa-
tion of liquid water inside cold walls.
5. Where duct is installed below the floor, use PVC coated round metal duct.
6. Duct installed beneath the floor should be insulated with styrofoam insulation.
7. Do not direct air over the pool water surface.
8. Always install flexible duct connections at the unit.
9. Under-floor perimeter air distribution for low windows should be installed.
10. Install 90° elbow and use acoustic insulation up to elbow only to eliminate air movement noise (see
also Duct Design guidelines)
11. Temporarily cover return grille(s) with paper or plastic to prevent entry of construction dusts.
12. See other requirements elsewhere in this section.
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Installations with sliding glass doors and/or windows set low in the wall should use under-floor perimeter
supply air distribution with the supply air directed vertically upward along the glass surfaces. This configura-
tion allows high air velocity and large air volumes.
BUILDING
CONSTRUCTION
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