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4
REV. D | © 2018 BIG ASS FANS | ALL RIGHTS RESERVED
Choosing an Extension Tube (Universal Mount Only)
Consult the tables below to select the appropriate extension tube for your fan.
Ceiling Slope
Haiku fans with a universal mount can be installed on sloped
ceilings with an angle no greater than 33°.
Fan Diameter
Maximum
Ceiling Slope
Extension Tube
Length
52 in.
(1.3 m)
26°
20 in.
(508 mm)
52 in.
(1.3 m)
33°
32 in.
(813 mm)
60 in.
(1.5 m)
22°
20 in.
(508 mm)
60 in.
(1.5 m)
33°
32 in.
(813 mm)
84 in.
(2.1 m)
16°
20 in.
(508 mm)
84 in.
(2.1 m)
29°
32 in.
(813 mm)
If installing your fan outdoors on a sloped ceiling, Big
Ass Fans recommends installing the Sloped Ceiling Fan
Stabilizer kit (available separately).
Ceiling Height
For optimum performance, Big Ass Fans recommends the
following extension tube lengths based on ceiling height.
Ceiling Height Extension Tube Length
9.5–11 ft
(2.9–3.4 m)
20 in.
(508 mm)
11–13 ft
(3.4–4 m)
32 in.
(813 mm)
13–14 ft *
(4–4.3 m) *
48 in. *
(1219 mm) *
>14 ft *
(>4.3 m) *
60 in. *
(1524 mm) *
* Big Ass Fans recommends using an extended length
extension tube for ceiling heights over 13 ft (4 m). The fan
comes standard with 20 in. (508 mm) and 32 in. (813 mm)
extension tubes. Other lengths are available by contacting
Customer Service.
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