Flooring And Hearth Material Selection - Rinnai RHFE 952 ETRN Operation & Installation Manual

FLOORING AND HEARTH MATERIAL SELECTION

The temperature in front of the fire (200-350 mm x 400 mm wide) can reach up to 40 °C above ambient, therefore
material selection is important. Some guidelines are detailed below. For example, vinyl planks are often only rated
for ambient temperatures. Consequently, the heater would not be suitable for installation directly on that flooring
type.
A
Dim. Non-combustible materials or materials
rated to 60 °C or higher above ambient
A No maximum.
B No minimum
C No minimum
No restriction
D
Refer floating hearth section below
1
Even if a material is rated above 60 °C it may still be subject to deterioration when exposed to heat cycles.
Always refer to the materials supplier for suitability. The temperatures given assume the heater is operating in a
room temperature of no more than 25 °C. Operation in higher ambient temperatures may result in higher surface
temperatures.
Floating hearth - low rated and unrated flooring materials
For unrated flooring materials, if you use a non-combustible floating hearth, the dimensions of the hearth, minimum
depth and minimum height can be optimised using the following calculations:
Min. hearth depth (A) = 450mm - height of hearth (for 50 °C rated materials it will be 400mm)
Min. hearth height (B) = 450mm - depth of hearth (for 50 °C rated materials it will be 400mm)
Example
For a 200mm deep non-combustible hearth, the calculation for hearth height would be:
450mm - hearth depth (A) (450mm - 200mm = 250mm). The non-combustible hearth height would need to be
250mm minimum.
This would mean the floating hearth dimensions could be 200mm deep and 250mm high.
Rinnai
B
C
non-combustible
hearth
Materials rated to a maximum
of 50 °C above ambient
150 mm maximum¹
150 mm minimum
400 mm minimum
Not suitable for carpets or any heat sensitive materials
21
GENERAL INSTALLATION INFORMATION
D
Unrated materials, anything up
to 20 °C above ambient
100 mm maximum¹
300 mm minimum
450 mm minimum
RHFE 952/1253 OIM