Dryer Booster Print
http://suncourt.com/Dryer%20Booster%20Print.html[1/6/2012 3:01:33 PM]
standards including fire rated construction.
Installation Guidelines:
Refer to Fig. 1 for suggested installations.
Fig. 1
To calculate “equivalent” feet, measure the total length of the metal straight duct sections and add
5 feet (1.5 meters) for each bend that is installed. Then add another 5 feet (1.5 meters) for the
screened outside exhaust hood.
1. The mechanical and electrical installation of your DRY04/DRY06 must conform to all applicable
national and local codes and standards. If unfamiliar with these codes and standards, you must
consult with certified and qualified commercial installers.
2. Never expose your DRY04/DRY06 to air temperatures in excess of 140°F. (60°C).
3. Do not use the DRY04/DRY06 if the instructions of your clothes dryer specifically warn against
the use of a clothes dryer booster fan. Find those instructions and review them carefully. If you
cannot locate these instructions, contact the manufacturer for a new set of instructions before
proceeding with the installation of your DRY04/DRY06.
4. There are important rules concerning the length of duct from your dryer to the outside of the
dwelling. It is unlikely that you will need a booster fan if the total length of the duct is less than 15
feet. This is assuming that the duct is at least 4” in diameter, has a smooth and clean internal
surface, is galvanized sheet metal and that the outside vent is unobstructed.
5. Do not install your DRY04/DRY06 closer than 6 feet (1.8 meters) to the dryer air outlet.
6. Do not install your DRY04/DRY06 in a duct with a total equivalent length of less than 25 feet (7.5
meters).
7. Do not install your DRY04/DRY06 in a duct with a total equivalent length greater than 140 feet
(46 meters).
8. A lint trap (field supplied) must be installed between the dryer and your DRY04/DRY06 in the
event the DRY04/DRY06 is located less than 15 feet (4.5 meters) (linear feet, not equivalent) from
the air exhaust of the dryer.
9. Use only galvanized 4” diameter sheet metal duct pipe and bends. Flexible metal duct may be
used if allowed by the applicable standards and codes.
10. It is best to install your DRY04/DRY06 as close to the duct outside outlet as possible.
11. Your DRY04/DRY06 must be installed where it is comfortably accessible for required
maintenance and service.
12. Ensure that all components of your installation are securely fastened to rigid surfaces.
13. You may install two small lengths of flexible duct with hose clamps (field supplied) where the
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