Movement - Lennox Hearth Products RAVELLE 42 Installation And Operation Instructions Manual

Increasing Efficiency and Hot Air Movement
A number of different options are available to the homeowner to maximize
the heat output and air movement to different rooms in the house .
Grills: If your Ravelle™ 42 gas fireplace is installed in a cabinet or a
chase, heat can be drawn from these enclosures and circulated into the
living area by cutting one or two openings covered by a register or Grill .
Figure 33
4" (102mm) or
6" (152mm) Duct
Figure 35
Opening and Grill into
Adjoining Room
Starter Ring
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 34
Whole Home Comfort System: The Whole Home Comfort System is a
very inexpensive and efficient way to use colder air from another room
as convection air for the fireplace blower which will have an end result of
warm air being distributed from the front of the fireplace . In the bottom of
the Ravelle™ 42 gas fireplace are four inch and Six inch (152 mm) diameter
knock-out plates . Four inch (102 mm) or six inch (152 mm) diameter
return air ducting may be fastened to the bottom of the fireplace, run into
another room in the house and terminated with a grill . When the fireplace
is burning, with or without the fireplace blower running, air is drawn from
a distant room (lowering the pressure in that room) through the return
air duct into the bottom of the fireplace . The air then passes through the
outer shell and heat exchanger of the fireplace and into the room in which
the fireplace is located . The hot air in the fireplace room moves through
an open doorway or hall into the low pressure room from which the air
was drawn . This system functions well by convection even without the
use of the fireplace blower . Six inch (152 mm) diameter ducting moves
more air than four inch diameter ducting . Ducting in uninsulated areas of
a house (for example in the crawl space) should be wrapped in insulation
to prevent excessive temperature loss for maximum performance . Check
local building codes - some areas may require firestops when the duct
passes from room to room .
Note: Grill can be in the Wall, Ceiling, or Floor.
Up to 100 Feet (30.5M)
Maximum Run
Possible Opening
and Grill Locations
on Cabinet
27