Ducting: install to fit your application, Main return to main return, Main return to main supply – Honeywell TRUEDRY DH150 User Manual
Page 8: Dedicated return to main supply, Dedicated return to main return, Electrical requirements

Installation Guide
69-2271EFS—01
6
Flex duct is recommended in connecting to the TrueDRY DH150 collars to reduce vibration noise.
M24745
Electrical requirements:
115VAC outlet. Ground fault
interrupter (GFI) recommended.
Duct Sizing: For total duct lengths, use round or rectangular duct sized accordingly:
- 10-inch for less than 25-ft
- 12-inch for more than 25-ft
For the optional fresh air ventilation port, use round insulated duct sized accordingly:
- 6-inch round for lengths of less than 50-ft.
- 8-inch round for lengths greater than 50-ft, or if more than 100-cfm is required
Ducting: Install to Fit Your Application
Ideal when…
• Running TrueDRY DH150 with A/C operation.
• Minimizing discharge air temperature (DAT)
increase is preferred.
• Space dictates.
Ideal when…
• Running TrueDRY DH150 opposite A/C
operation. Running with A/C operation requires
damper on the exhaust port to minimize
backdraft when TrueDRY DH150 is not on but
A/C is.
• Minimizing DAT increase is preferred.
• Space dictates.
Ideal when…
• Drying a specific area of the house.
• Running with A/C operation requires backdraft
damper on the exhaust port to minimize
backdraft when TrueDRY DH150 is not on but
A/C is.
• Minimizing DAT increase is preferred.
Ideal when…
• Running TrueDRY DH150 with A/C operation.
• Drying a specific area of the house.
• Minimizing DAT increase is preferred.
TrueDRY DH150 can be ducted into the central forced air sys-
tem, or operate as a stand-alone in designated, high-humidity
zones within the home, such as a basement or crawl space.
A
Main Return to Main Return
SUPPLY
RETURN
AIR HANDLER
M27965
TrueDRY
B
Main Return to Main Supply
SUPPLY
RETURN
AIR HANDLER
TrueDRY
M27966
BACKDRAFT
DAMPER
C
Dedicated Return to Main Supply
SUPPLY
RETURN
AIR HANDLER
TrueDRY
M27967
BACKDRAFT
DAMPER
SEPERATE
RETURN
D
Dedicated Return to Main Return
SUPPLY
RETURN
AIR HANDLER
M27968
TrueDRY
SEPERATE
RETURN