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Collection: CENTRAX® DRYER BOOSTER FAN KIT

A long or restrictive dryer exhaust duct can make it harder for your dryer's built-in blower to move warm, moist air outdoors. Our Centrax® Dryer Booster Fan Kit DRY04 provides additional airflow support for residential electric dryers with total equivalent duct lengths between 25 and 140 feet.

We use a current-sensing switch to detect when the dryer operates and automatically turn the booster fan on and off. Unlike pressure-switch systems, this approach responds to electrical current from the dryer rather than changes in duct pressure that can be affected by wind, stack effect, or installation conditions.

Automatic operation through current sensing
Rated for 25 to 140 feet of total equivalent duct length
Thermal overload protection with automatic reset
MET® listed to UL and CSA standards for the United States and Canada

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Current-Sensing Control

Automatic Fan Operation

25 to 140 Feet Equivalent Duct Length

5-Year Limited Warranty

Buying guide

How to choose CENTRAX® DRYER BOOSTER FAN KIT

Your dryer already has a blower that moves exhaust through the vent. As the duct route gets longer or includes more bends, resistance can make it harder for that blower to move air effectively. A dryer vent booster fan adds airflow support within the exhaust duct. It may help when the existing vent route falls within the product's approved operating range but needs additional assistance to move exhaust outdoors.

Before choosing a booster fan, assess the complete vent system. A blocked exterior termination, crushed duct, disconnected joint, or heavy lint buildup should be corrected first.

We offer different dryer exhaust systems for different applications. The DRY04 is our primary dryer booster kit for residential electric dryers. The CentraSense® DRM04 is designed for qualifying DEDPV applications.

Key Benefits

Our dryer booster systems are designed to address specific exhaust airflow needs.

The DRY04 uses a current-sensing switch to operate with the dryer, so you do not need to turn the fan on and off manually.
The DRY04 is rated for total equivalent duct lengths of 25 to 140 feet.
Additional exhaust airflow can help when duct resistance is limiting dryer performance.
The system is designed to help reduce lint accumulation inside the dryer and duct.
Thermal overload protection and automatic reset are included.
The DRY04 carries a 5-year limited warranty.

Warranty and Product Support

Our Centrax® DRY04 Dryer Booster Fan Kit carries a 5-year limited warranty. The CentraSense® DRM04 also carries a 5-year limited warranty.

Review the product-specific installation instructions before beginning installation.

Technical Specifications

Specification	Centrax® DRY04
Product Type	Dryer Booster Fan Kit
Approved Dryer Type	Electric clothes dryers
Control	Current-sensing switch
Operation	Automatic on/off
Total Equivalent Duct Length	25 to 140 feet
Motor Protection	Thermal overload protection with automatic reset
Safety Rating	MET® listed to UL and CSA standards for the United States and Canada
Limited Warranty	5 years

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SUNCOURT® DRYER BOOSTING KIT | DRY04

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Category FAQ

01 When should I consider a dryer vent booster fan?

Consider one when a long or restrictive exhaust route makes it difficult for the dryer's built-in blower to move air effectively. Inspect the ductwork and exterior termination first, then check whether your system falls within the selected product's rated equivalent duct length.

02 How does the Centrax® DRY04 know when to turn on?

Its current-sensing switch detects electrical current from the operating dryer and controls the booster fan automatically. No manual switching is needed during normal operation.

03 Can I install the DRY04 on a gas dryer?

No. The DRY04 is approved for electric clothes dryers only. Check the product specifications before installation.

04 What is the maximum equivalent duct length for the DRY04?

The DRY04 is rated for a total equivalent duct length of 25 to 140 feet. The allowable length for an individual installation must also meet the dryer manufacturer's requirements and applicable installation rules.

05 What is the difference between the DRY04 and CentraSense® DRM04?

The DRY04 is designed for residential electric dryers and supports 25 to 140 feet of total equivalent duct length. The CentraSense® DRM04 is a DEDPV system for residential electric dryer duct applications, rated for 25 to 100 feet. It includes a low-voltage clip-on current sensor, cleanout sleeves, and a remote indicator.