Zephyr Essentials Typhoon AK2100BS Guide D'utilisation, D'entretien Et D'installation page 13

3-1/4"x10" Rectangular Vertical Ducting
1. Using a Philips-head screwdriver remove the screws and
round vertical transition adapter from top of hood body.
transition adapter. Secure rectangular adapter and
rectangular collar to hood body using the previously
removed screws from step 1.
2. Replace round vertical transition adapter with
rectangular transition adapter. Do not secure to hood body
yet.
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