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Venting
General Venting Requirements
The fireplace operates using a direct vent system and requires co-axial direct vent pipe. The fireplace must be properly connected to
an approved vent system. Venting is not provided with the fireplace and must be sourced from one of the approved vent manufacturers
mentioned in the table below. Proper installation, use, and maintenance of venting is determined by and can be acquired from the
vent manufacturer.
Vent Requirements
Fireplace Model
Direct Vent Type
Vent Size
Approved Vent Manufacturers
77HH Front
77HH RS
77HH LS
77HH TS
Passive Vent
(standard)
5x8 co-axial direct vent pipe
(5” interior, 8” exterior)
BDM: Pro-Form Direct Vent System
Enervex RS Power Vent
(optional)
Ortal Power Vent
(optional)*
3x5 co-axial direct vent pipe
(3” interior, 5” exterior)
*Power Vent: a fan-assisted direct vent system that boosts airflow for vent configurations with too much constriction.
Review “Vent Configurations” section on page 29 to determine if your fireplace needs a power vent.
ORTAL POWER VENT NOTE: See the Ortal Power Vent Manual for more details on power venting.
ENERVEX POWER VENT NOTE: See Ortal’s Enervex RS Power Vent Manual for more details on power venting with an
Enervex power vent.
TERMINATION CAP NOTE: Low Profile Termination Cap and Sconce Termination Cap can negatively impact flame
appearance and are not recommended for use with the fireplace.
WARNING: Do not combine vent components from different vent manufacturers. Please follow the manufacturer’s
instructions for vent system installation.