DUCTING TO HVAC SYSTEM – BASEMENT AND ATTIC INSTALLATIONS
The Preferred Installation is to duct the dehumidifier to pull air from and return dehumidified air to the HVAC return duct.. This installation will ensure warm, dehumidified air is thoroughly mixed with the HVAC system air before being discharged into the living space.. Alternatively, the dehumidifier can be ducted to discharge to the supply duct, but the external static pressure of the HVAC system must not exceed 0.4”w.c. for the 1830 and 0.6”w.c. for the 1850/1850W.
Required Component
10” Ductwork
Figure 11 – Preferred Basement Installation
10” DUCT |
| |
AIR IS PULLED | HVAC/FURNACE | |
FROM AND | ||
6 ft | ||
SUPPLIED TO THE | ||
RETURN DUCT | MIN |
| DEHUMIDIFIER |
| |
Figure 13 – Preferred Attic Installation | |
| PLENUM BOX OR |
AIR HANDLER | 6 FT. MIN. |
| |
FILTER |
|
10" DIA. INSULATED DUCT | |
Figure 12 – Alternate Basement Installation | ||
Model 1850(W) | AIR IS DISCHARGED | |
0.6” w.c. MAX | ||
TO SUPPLY DUCT | ||
Model 1830 | ||
| ||
0.4” w.c. MAX |
| |
| HVAC/FURNACE | |
AIR IS |
| |
PULLED FROM |
| |
RETURN DUCT |
| |
10” DUCT | ||
| ||
Figure 14 – Alternate Attic Installation
|
| Model 1850(W) |
|
|
| 0.6" w.c. MAX. |
|
PLENUM BOX |
| Model 1830 | PLENUM |
|
| 0.4" w.c. MAX. | |
|
| AIR HANDLER |
|
| 24" MIN. | FILTER |
|
|
|
|
BOTH SIDES | CONDENSATE PAN |
|
10" DIA. INSULATED DUCT BOTH SIDES
CONDENSATE PAN
Ducting Notes:
•Use insulated duct when the dehumidifier is located in an unconditioned space such as an attic or a garage.
•Use a minimum of 12” of flex duct at the dehumidifier inlet and outlet to prevent vibration noise transmission.
•When ducting return to return (preferred), the dehumidifier must be wired to turn on the HVAC fan when operating (see page 14).
•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..
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