Installation Guide

10 English
DUCTING THE DEHUMIDIFIER INLET AND OUTLET TO THE HVAC SYSTEM
Return-to-Return Basement Installation Return-to-Supply Basement Installation
1
2
4
19
6'
Min
3
90-1886
5
7
6
8
4
9
90-1887
Return-to-Return Attic Installation Return-to-Supply Attic Installation
18
14
15
13
11
6'
Min
17
90-1888
12
14
15
10
13
7
6
11
24"
Min
16
90-1889
Figure 15: Four Installation Configurations
1 - Air is Pulled from the Main Return Duct and
Discharged to the Main Return Duct
2 - 10" Duct
3 - 6' Minimum
4 - HVAC/Furnace
5 - Air is Pulled from the Main Return Duct
6 - Model E080 0.4" WC Maximum
7 - Model E100H 0.6" WC Maximum
8 - Air is Discharged to the Supply Duct
9 - 10" Duct
10 - Plenum Box
11 - Air Handler
12 - Plenum
13 - Filter
14 - Condensate Pan
15 - 10" Diameter Insulated Duct Both Sides
16 - 24" Minimum
17 - 6' Minimum
18 - Plenum Box or Y-Fitting
19 - Dehumidifier
• Use when both sides of the duct system are
accessible
(see Figure 16) .
• When ducting from return to supply, the HVAC
blower does not need to be running when the
dehumidifier is running.
• When ducting return to supply, allow adequate
space before the first branch duct to ensure the
warm dehumidified air is thoroughly mixed with the
HVAC system air.
• When ducting from return to return, wire the
dehumidifier to the HVAC system as shown in
Figure 20 to ensure the HVAC blower runs when the
dehumidifier is operating.
• Wire the dehumidifier to the HVAC system
(
see Figure 20 for exact wiring) and set up the
dehumidifier to be disabled when the AC is running.