Vermont Casting RHE42 - Manual (Page 5)

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Vermont Castings, Majestic Products RHE Natural Vent Insert
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
fireplace 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.
Framing & Finishing
For Zero Clearance Kit applications it is important to
determine the finished facing material before beginning
to frame. This will allow for the thickness of the
finishing material between the frame and the fireplace
trim.
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).
24" Min.
(610mm)
FP1325
Fig. 2 Minimum mantel height above fireplace.
The use of wallpaper adjacent to this
fireplace is not recommended, as the
high heat given off by this fireplace may
adversely effect the binders in the adhe-
sive used to apply the wallpaper.
35"
(889mm)
37 ¹⁄₄ " (946mm)
27 ¹⁄₄ " (692mm) (RHE25/32)
25 ³⁄₄ " (654mm) (RHE42)
19 ¹⁄₈ " (486mm)
(RHE25/32)
21 ³⁄₄ " (553mm)
(RHE42)
Decorative Trim Kit Finish Wall
Dry
Wall
FP1351a
Fig. 3 RHE insert framing dimensions.
Air Inlet Channel
Combustion Air
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.