BIS TRADITION - Hot Air Ducting and Outside Air Installation; 3.5 Hot Air Ducting Installation

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3.5 HOT AIR DUCTING INSTALLATION (optional)
Different hot air ducting systems can be installed with the BIS TRADITION:
- Gravity kit
- Forced air kit
The gravity kit is used when the rooms are on same level or floor as the fireplace or on an
upper level or floor. If the heat to be distributed is on a lower level or floor or through the
central heat duct of a furnace, then the forced air kit MUST be used.
3.5.1 Gravity Kit
Double hot air outlet including:
(See figure 16)
- 2 telescopic lengths 8" I.D.
- 2 90º elbows 8" I.D.
- 2 hot air outlet kits (grill and frames)
- 2 adaptors
See components list section 5.
Only the fan available with the fireplace can be used with the gravity kit .
Figure 16
The safety rules for hot air ducting gravity kit installations are the following:
Minimum height* 68" (1727 mm)
Maximum length See figure 18
* The height of the louver must be measured from the base of the BIS to the middle point of
the louver.
WARNING: both pipes of the double hot air outlet must be installed. Any other
installation may cause fire and void warranty.