Hot Air Ducting Installation; Gravity Kit - Lennox BRENTWOOD SP Installation And Operation Instructions Manual

HOT AIR DUCTING INSTALLATION

The Brentwood™ is approved for use with a

Gravity Kit.

Gravity Kit
The gravity kit is designed for double hot air
outlets and includes: (See Figure 12)
- 2 telescopic lengths 8" I.D.
- 2 90º elbows 8" I.D.
- 2 hot air outlet kits (grill and frames)
- 2 adaptors
See Gravity Kit Accessories on Page 20.
The only blower that can be used with the gravity
kit is the UZY5.
The gravity kit allows you to block the upper
louver of the fireplace. To do so, follow the
steps below:
a) Remove the upper louver from the fire-
place.
b) Install the black panel (BWCF) making sure
that the insulation strip is installed inside.
c) The fireplace facade can be covered with
non-combustible material (Figure 14).
10
Frame
Grille
Figure 12
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
For safe installation, the gravity kit must meet
the following requirements:
Minimum height* 68" (1,727 mm)
Maximum length See Figures 13 & 14
* The height of the louver must be measured
from the base of the Brentwood to the middle
point of the louver.
To extend the double outlet system forward of
the Brentwood (not flush), it will be necessary to
purchase two adjustable lengths (7B26ZL2A).
When installing the double outlet system, the
hot air outlets can be installed in the same room
as the fireplace, or one or both of the outlets
can be installed in adjacent or upper rooms.
Installing the ducts at different elevations will
tend to exhaust more heat out of the higher
outlet (Figure 14).