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a few simple rules to plan your
ductwork
THIS HOOD IS DESIGNED TO USE AN 8" ROUND DUCT -
IT MAY BE TRANSITIONED TO A 4" X 14" RECTANGULAR DUCT
NEVER REDUCE DUCT SIZE. UNDERSIZED DUCTING SEVERELY RESTRICTS AIR
FLOW AND HARMS PERFORMANCE.
(Example: the area of an 8" Duct is more than 75% larger than a 6" Duct)
KEEP DUCT RUNS AS SHORT AND STRAIGHT AS POSSIBLE.
AVOID USING FLEXIBLE METAL DUCTING IF RUN IS LONGER THAN 6'.
NEVER USE PLASTIC DUCTING.
USE SMOOTH BORE METAL DUCTING.
MINIMIZE THE NUMBER OF FITTINGS (see chart).
WHEN YOU MUST USE FITTINGS, TRY TO SEPARATE THEM WITH SECTIONS OF
4' OR MORE OF STRAIGHT DUCT.
ALWAYS FOLLOW THE MANUFACTURER'S GUIDELINES FOR THE COOKING
EQUIPMENT YOU ARE VENTING.
IF MAKE UP AIR CONTROL DAMPERS ARE REQUIRED, POSITION THE SENSOR
IN A STRAIGHT RUN OF DUCT IDEALLY WITH 4' OF STRAIGHT DUCT BETWEEN
EACH SIDE OF THE SENSOR AND A DUCT FITTING. REMEMBER TO INCLUDE
POWER AND CONTROL WIRING FOR THIS IN YOUR PLANS.
ADHERE TO ALL LOCAL BUILDING CODES AND ORDINANCES.
USE THE WORKSHEET THAT FOLLOWS TO HELP CALCULATE THE
TOTAL EQUIVILENT FEET OF YOUR DUCT RUN.
TOTAL EQUIVILENT FEET SHOULD BE LESS THAN 100'.
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