Nectre Fireplaces N550 Installation Instructions Manual page 8

Installation
Installing the floor protector
The oven must be placed on a
non-combustible floor protector with
an R-value of 2.12 or greater. For
multiple layers, add R-values of
each layer to determine the overall
R-value. When manufacturers
provide a k-factor or C-factor for the
Figure 2 - R=1/C EXAMPLE:
If the floor protector is 4" brick with a C-factor of 1.25, over 1/2" mineral
board with a "k" factor of 0.29, the total R-value of the system (R
4" brick C = 1.25
1/2" mineral board K = 0.29, R
R = R + R
total brick
In this example, the R-value is greater than 2.12 required and therefore this
floor protector is a suitable combination that provides the required thermal
protection.
In the USA, the floor protector must extend 8" (203 mm) beyond each side
of the flue loading door and 16" (406 mm) to the front. In Canada, the floor
protector must extend 8" (203 mm) beyond each side and the back of the
appliance and 18" (457 mm) to the front. Refer to figure 3.
Figure 3
Non-combustible floor protector requirements
8" (200mm) -
Canada
8" (200mm)
USA
8
R
R
mineral
STOVE
TOP
DOOR
18" (457mm) - Canada
16" (406mm) USA
material, you will need to convert
these to the R-value.
The following equations can be
used to convert these factors to the
R-value:
• k-factor, is given with a required
thickness (T) in inches: R=1/k x T
• C-factor, is given:
= 1/1.25
brick
= 1/0.29 x 0.5
mineral
= 0.8 + 1.724
total
8" (200mm) - Canada
8" (200mm) -
Canada
8" (200mm)
- USA
) is:
total
= 0.8
= 1.724
= 2.524
In a rear vent
installation, the floor
protection must also
extend under the
stove pipe/chimney
connector and a
minimum of 2"
(51 mm) beyond
each side.
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