Fans by Fantech Electronic Catalogue

2016

Figure 3.2. - Mounting of Roof Units to ductwork

Don’t connect to the ‘eye’ of the base as this increases pressure

losses on the intake.

Size inlet duct to fit roof unit overflashing.

3.0 ROOF UNITS

Figure 3.1. - Roof ventilator short-circuiting of air

Ensure the roof ventilator base has an airtight seal.

If the unit does not have an airtight seal between the base and

the upstand, short-circuiting of outside air can occur thereby

reducing the amount of air being exhausted from the building.

An airtight seal between the upstand and fan base prevents

short-circuiting of outside air ensuring the fan is exhausting from

the designated space.

INSTALLATION DO’S AND DON’TS

P-8