Osburn AC01340 - Manual (Page 9)

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Connect the insulated flexible aluminized trilaminated pipe (B) to the fireplace adapter
(E), then to the inlet of the heat distribution blower (A) using two clamp collars (C). Use
the same procedure to secure the insulated flexible pipe to outlet of the heat distribution
blower (A) and to the air register (D). Although it is not mandatory, it is recommended to
use insulated flexible pipe for the entire length in order to circulate air at a sufficient
temperature through the system. To obtain optimal efficiency, a maximum run of 50
feet is recommended.