Install to Fit Your Application
Flex duct is recommended in connecting to the DR90/DR120A3000 collars to reduce vibration noise.
Dedicated Return to Main Supply
Main Return to Main Supply
Duct Sizing: Use minimum 10" diameter round for
duct lengths up to 25' Minimum 12" required for
lengths longer than 25' Duct branches from the main
inlet/exhaust should be minimum 10" round for 2-3
branches, and 12" round or larger for 4 branches or
For the optional fresh air ventilator port, use 6" round,
insulated duct for lengths up to 50'
Use 8" round duct for more than 50' 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
dehumidifier is available.
Requires backdraft damper on the
exhaust port to minimize backdraft
when dehumidifier is not on but A/C is.
(optional) Duct humidifier supply with
20% open gravity damper to provide
dry air to a specific area
Running dehumidifier when not
Requires damper on the exhaust port
to minimize backdraft when DR90/
DR120A3000 is not on but A/C is.
Access to a dedicated central return is
DR90/DR120A3000 Dehumidification System 33-00298EFS—01