15
Fig: 25 Split Butterfly Damper
Damper Options and Operation (cont’d)
The Split Butterfly Damper is controlled via rotary flex cable from the room side and is adjustable
from fully open to fully closed position with one (1) full revolution using a Phillips head screwdriver
(see Fig. 25).
Insulation Options
Insulation options are available to prevent heat loss, mitigate potential condensation, and/or provide
sound attenuation. Determining the use of these options is the responsibility of the design engineer.
The 2" foil-backed option is an aluminum foil-backed fiberglass (installed 6.0 R-value) attached to
the housing using adhesive-mounted insulation anchors and caps. The Armaflex option is a ½"
thick, semi-solid panel (installed 2.1 R-value) mounted using adhesive and tape at the seams.
