Mantels; Framing And Finishing; Combustion Air - Majestic Vemont Castings RHE25 Installation Instructions & Homeowner's Manual

Mantels

When the insert is being installed into a woodburning
fireplace the minimum the mantel can be above the
fireplace is governed by local building codes applicable
to woodburning fireplaces. Consult local authorities
having jurisdiction for these clearances.
For applications requiring the use of a Zero Clearance
Kit, the minimum a mantel can protrude above the fire-
place is 24" (610mm) from the top of the upper louvres.
The maximum mantel depth is 8" (200mm). (Fig. 2)
The underside of the mantel will get quite
warm. Use only finishes which are heat
resistant and do not discolour.
Fig. 2 Minimum mantel height above fireplace.
Framing & Finishing
For Zero Clearance Kit applications it is important to
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determine the finished facing material before beginning
Insert mantel
to frame. This will allow for the thickness of the finishing
height
material between the frame and the fireplace trim.
4/1/03 djt
Similarily, consideration must be given to the 1" (25mm)
depth of the air inlet channel sitting on the fireplace
base. Finishing material for the hearth should be flush
with the top of the air inlet channel.
If the fireplace is installed at floor level a non-
combustible hearth must extend a minimum 12"
(305mm) in front of the fireplace.
If the fireplace is recessed into the wall and at least 12"
(305mm) above floor level, no hearth is required.
A (3" for RHE25, 4" for RHE32 and RHE42) diameter
Class "B" vent must be used when installing the
fireplace insert along with the Zero Clearance Kit. The
vent system must be a minimum height of 12' (3.7m).
10000836
Vermont Castings, Majestic Products RHE Natural Vent Insert
35"
(889mm)
24" Min.
(610mm)
19¹⁄₈" (486mm)
(RHE25/32)
21³⁄₄" (553mm)
(RHE42)
Dry
Wall
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Fig. 3 RHE insert framing dimensions.
It is very important that an adequate air supply is
available when the unit is being operated. Since
most homes of today are tightly sealed and insulated,
additional make-up air is usually necessary.
This fireplace has been designed to operate by
drawing air in from the front and outer perimeters of the
fireplace. The air provides combustion air ensuring a
clean burning flame, dilution air for proper venting, as
well as, the air which the fan circulates over the firebox/
heat exchanger system.
Insulating around the fireplace will result in overheating
and possible malfunctioning of the circulating fan.
The use of wallpaper adjacent to this
fireplace is not recommended, as the high
heat given off by this fireplace may ad-
versely effect the binders in the adhesive
used to apply the wallpaper.
37¹⁄₄" (946mm)
Air Inlet Channel
27¹⁄₄" (692mm) (RHE25/32)
25³⁄₄" (654mm) (RHE42)
Finish Wall
Decorative Trim Kit
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RHE

Combustion Air

Insert framing
and finishing
6/03
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