Install to Fit Your Application
Flex duct is recommended in connecting to the TrueDRY DR90/DR120 collars to reduce vibration noise.
Dedicated Return to Main Supply
Main Return to Main Supply
Duct Sizing: use minimum 10-in. diameter round for
duct lengths up to 25 ft. Minimum 12-in. required for
lengths longer than 25 ft. Duct branches from the main
inlet/exhaust should be minimum 10-in. round for 2-3
branches, and 12-in. round or larger for 4 branches or
For the optional fresh air ventilator port, use 6-in. round,
insulated duct for lengths up to 50 ft.
use 8-in. round duct for more than 50 ft. of if more than
100 CFM is required.
Isolated Areas: Effective dehumidification may require
ducting to isolated or stagnant air flow areas.
115 VAC outlet. Ground fault
interrupter (GFI) recommended.
• Access to dedicated central return for
TrueDRY is available.
• Requires backdraft damper on the
exhaust port to minimize backdraft when
TrueDRY is not on but A/C is.
• (optional) Duct TrueDRY supply with 20%
open gravity damper to provide dry air to
a specific area
• Running TrueDRY when not running A/C.
• Requires damper on the exhaust port to
minimize backdraft when TrueDRY DR90/
DR120 is not on but A/C is.
• Access to a dedicated central return is
TrueDry DR90/DR120 Dehumidification System 69-2690EFS—04