ABBAKA Range Hood & Hy-Ex Ventilation System Manuel d'instructions d'installation - Page 4

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Hy-Ex Professional Exterior Ventilator

Correct Ducting and Venting

Use proper sized smooth galvanized ductwork- Hy-Ex 1.4 (1400

CFM) 10" round; Hy-Ex 1.0 (1000 CFM) 8" round

Do not use flexible duct.

Ribbing creates resistance to airflow, reducing exhaust efficiency.

Do not space elbows closer than 4' to each other.

Do not make "S" turns or double elbows anywhere in duct run.

Do not reduce suggested minimum size anywhere in duct run.

Even in wall louvers and roof jacks. (10" round = 78 Sq. In.;

8" round = 51 Sq. In.)

Make gradual turns in duct run.

Do turn sharp corners. Air cannot make 90° turns.

Maximum number of elbows in a duct run is 3.

Each elbow is equal to 6' of duct run.

Use the shortest and straightest duct run possible.

Maximum duct run is 51', including elbows.