A French manual is available upon request. Order P/N 506223-28.
Ce manuel d’installation est disponible en francais, simplement en faire la demande. Numéro de la
pièce 506223-28.
This appliance must be properly installed and operated in order to prevent the
possibility of a house fire. Please read this entire installation and operation
manual before installing and using your wood stove. Failure to follow these
instructions could result in property damage, bodily injury or even death.
Contact your local building or fire officials to obtain a permit and
information on any installation requirements and inspection
requirements in your area.
4002589
Wood-Burning Stoves
Models Grandview™
GV230 and GV300
WARNING
• Hot! Do not touch! The glass and surfaces of this appliance will
be hot during operation and will retain heat for a while after
shutting off the appliance. Severe burns may result.
• Carefully supervise children in the same room as appliance.
CONGRATULATIONS!
When you purchased your new wood stove, you joined the ranks of
thousands of individuals whose answer to their home heating needs
reflects their concern for aesthetics, efficiency and our environment. We
extend our continued support to help you achieve the maximum benefit
and enjoyment available from your new wood stove.
Thank you for selecting a Lennox Hearth Products wood stove as the
answer to your home supplemental heating needs.
TABLE OF CONTENTS
Using This Manual ......................................................................... 2
Important Safety Information ......................................................... 3
Testing Information ........................................................................ 4
Product Reference Information .................................................... 32
USING THIS MANUAL
Please read and carefully follow all of the instructions found in this
manual. Please pay special attention to the safety instructions provided
in this manual.
PRODUCT IS SUBJECT TO CHANGE WITHOUT NOTICE
2
IMPORTANT SAFETY AND WARNING
INFORMATION
READ THIS MANUAL IN ITS ENTIRETY AND UNDERSTAND THESE RULES TO FOLLOW FOR SAFETY.
1. When this room heater is not properly installed, a house
fire may result. To reduce the risk of fire, follow the installation instructions. Contact local building or fire officials
about restrictions and installation inspection requirements
in your area.
2. Wear gloves during installation to avoid injury from sharp
edges on the stove and/or its parts.
3. This unit is designed and engineered to burn only dry, wellseasoned wood. Burning wet wood will greatly reduce the
stove’s efficiency, produce excessive amounts of smoke
and can cause dangerous chimney fires due to creosote
build-up.
4. Before opening the door, the draft control must be fully open
to avoid possible combustion flash (ignition of hot volatile
gases as the door is opened).
5. Never use gasoline, gasoline-type lantern fuel, kerosene,
charcoal lighter fluid, or similar liquids to start or ’freshenup’
a fire in this heater. Keep all such liquids well away from
the heater while it is in use. DO NOT USE CHEMICALS OR
FLUIDS TO START THE FIRE.
6. While burning, fuel utilizes oxygen from the air in the room.
Be sure to allow an adequate amount of fresh air into the
room where the stove is burning.
7. The outside surface of the stove will be hot while burning
properly and can set items like clothing and curtains on
fire. Keep furnishings and other combustible materials
away from the stove. Using the heat from the stove to dry
wet clothing can be hazardous if clothes are placed too
near the surface of the stove.
8. HOT WHILE IN OPERATION. KEEP CHILDREN, CLOTHING
FURNISHINGS AND COMBUSTIBLE MATERIAL A CONSIDERABLE DISTANCE AWAY. CONTACT MAY CAUSE SKIN BURNS.
Do not allow children to play near the stove without close
supervision. Do not touch the stove while it is burning.
Use extreme caution while the unit is in use. Surface temperatures become dangerously hot and can cause serious
burns.
9. Do not allow anyone to operate the stove who is not familiar
with the operating instructions.
10. Attempts to achieve heat output rates that exceed stove
design specifications can result in permanent damage to
the stove. Never leave your stove unattended on high burn
rates. This may cause overfiring. Overfiring the stove may
cause a house fire. If the stove glows, you are overfiring.
11. Keep a water hose or hand-operated fire extinguisher close
for safety.
12. Smoke Detectors - Since there are always several potential sources of fire in any home, we recommend installing
smoke detectors. If possible, install the smoke detector in
a hallway adjacent to the room (to reduce the possibility
of occasional false activation from the heat produced by
the stove). If your local code requires a smoke detector
be installed within the same room, you must follow the
requirements of your local code. Check with your local
building department for requirements in your area.
13. Inspect your chimney at least once a month during the burn-
ing season to check for soot and creosote accumulations.
Any accumulations over 1/8” thick should be removed by
a professional chimney sweep. Do not attempt to burn out
heavy creosote accumulations with a hot fire. If large accumulations are occurring, review your burning procedures.
14. If a creosote fire should develop, the fire department should
be called immediately and then attempts should be made
to control the fire until assistance arrives. If a “runaway”
fire should develop causing over-heating of the stove, the
door and draft regulators should be closed immediately.
The fire should die down once deprived of oxygen. After a
severe chimney fire, the complete chimney system should
be checked before further use.
15. Do Not Use Grate Or Elevate Fire - Build Wood Fire Directly
On Hearth (firebrick). Do not use andirons or other methods
of supporting the fuel.
16. Please read this entire manual before you install and use
your new room heater. Failure to follow instructions may
result in property damage, bodily injury, or even death.
17. Check all local building and safety codes before installation.
The installation instructions and appropriate code requirements must be followed exactly and without compromise.
In the absence of local codes the following standards and
codes must be followed.
18. In the U.S.A, install in accordance with the National Fire
Protection Association’s Code, NFPA 211, Standards for
Chimneys, Fireplaces, Vents and Solid-Fuel-Burning Appli ances, or similar regulations, may apply to the installation
of a Solid-Fuel-Burning appliance in your area. In Canada,
the guideline is established by the CSA Standard, CAN/
CSA-B365-M93, Installation Code for Solid-Fuel-Burning
Appliances and Equipment.
19. DO NOT CONNECT TO OR USE IN CONJUNCTION WITH ANY
AIR DISTRIBUTION DUCTWORK UNLESS SPECIFICALLY
APPROVED FOR SUCH INSTALLATIONS.
20. WARNING: BURNING IMPROPER FUEL (I.E. CHARCOAL)
CAN RESULT IN CARBON MONOXIDE POISONING, WHICH
MAY LEAD TO DEATH!
21. Carbon Monoxide Poisoning - Early signs of carbon monoxide poisoning resemble the flu with headaches, dizziness,
or nausea. If you have these signs, get fresh air at once!
Have the heater inspected by a qualified service technician.
Some people are more affected by carbon monoxide than
others. These include pregnant women, people with heart
or lung disease or anemia, those under the influence of
alcohol, and those at high altitudes.
22. Failure to use manufacturer provided parts, variations in
techniques and construction materials or practices other than
those described in this manual may create a fire hazard and
void the limited warranty.
23. Do not make any make-shift compromises during installation. Any modification or alteration may result in damage
to the appliance or dwelling and will void the warranty,
certification and listings of this unit.
24. These appliances are designed as supplemental heaters.
Therefore, it is advisable to have an alternate heat source
when installed in a dwelling.
25. Do Not Overfire - If Heater or Chimney Connector Glows,
You Are Overfiring.
26. DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE.
27. DO NOT BURN GARBAGE OR FLAMMABLE FLUIDS SUCH
AS GASOLINE, NAPHTHA OR ENGINE OIL.
Safety and General
Safety and General
Planning Installation
Installation
Operation
Maintenance
Troubleshooting
Parts / Accessories
3
TESTING INFORMATION
SELECTING THE PROPER VENTING SYSTEM
This manual describes the installation and operation of the Grandview™
230 and Grandview 300 non-catalytic wood heaters. This heater meets
the U.S. Environmental Protection Agency’s emissions limits for wood
heaters sold on or after July 1, 1990. This heater has been developed,
tested and constructed in accordance with the requirements of UL 1482,
ULC S627 and HUD standards and is listed by Intertek Testing Services,
Portland, OR. It has been approved for residential, mobile home and
alcove installations.
DRAFT REQUIREMENTS
This appliance is dependent upon a properly functioning chimney for
optimum performance. It is a high efficiency appliance that loses much
less heat up the chimney than older appliances and fireplaces. For this
reason it is important to match the stove to the chimney. The chimney
hastwofunctions:
1. It draws combustion air into the appliance (without air, no fuel will
burn) and
2. It exhausts combustion by-products. Your new Country® Collection
The appliance depends solely on the natural draft of the chimney system
to draw combustion air into the unit. Draft is the force that moves air
from the appliance up into the chimney. The amount of draft in your
chimney depends on the length of the chimney, local geography, nearby
obstructions and other factors. Too much draft may cause excessive
temperatures in the appliance (overfiring). Slow or inadequate draft
equals poor combustion and possible smoking problems. The following
2. A chimney with not enough height to produce adequate draft.
3. A chimney with excessive height (this may allow exhaust to cool too
much before exiting, which will stall the rate the exhaust exits).
4. Offsets in the venting system are too restrictive (see Chimney Guide-lines).
Inadequate draft will cause the appliance to leak smoke into the room
through the stove and the chimney connector joints.
Excessive draft may cause an uncontrollable burn or a glowing red stove
or chimney part.
The appliance is merely one component of a larger system. The other
equally important component is the venting system. This is necessary for
achieving the required flow of combustion air to the fire chamber and for
safely removing unwanted combustion by-products from the appliance.
If the venting system’s design does not promote these ends, the system
may not function properly. Poorly functioning venting systems may create
performance problems as well as be a safety hazard. A draft test should
read greater than .04’ W.C. (inches water column) and less than .08”
W.C . As per NFPA-211 standard (see paragraph below), the installer
must take into account all variables within the installation and install the
appliance in such a manner that satisfies the draft requirements of the
appliance. See Chimney Guidelines below to assist you in selecting the
proper venting system for your installation.
American National Standards Institute ANSI/NFPA 211, Standard for
Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances - See
Draft Section: A chimney or vent shall be so designed and constructed
to develop a flow sufficient to completely remove all flue and vent gases
to the outside atmosphere. The venting system shall satisfy the draft
requirements of the connected appliance in accordance with the manufacturer’s instructions.
vertical vent, the effective draw would only be approximately 9 feet
(14 ft. - 5 ft. = 9 ft.), therefore it may be necessary to add additional
height to the venting system.
a good draft up your chimney. The poor draft is caused by a shortage
of air in the house. In this situation an Outside Air Kit may need to
be installed (See Negative Pressure Warning on Page 5 and Outside Combustion Air on Page 17).
Overfiring Damage - If the heater or chimney connector glows, you are
out of components, plated accessories may turn color, stove glass may
develop a haze, which will not come off with cleaning.
Overfiring of a stove is a condition where excessive temperatures are
reached, beyond the design capabilities of the appliance. The damage
that occurs from overfiring is not covered under the manufacturer’s
limited warranty.
Also see Troubleshooting on Page 28.
4
CHIMNEY HEIGHT REQUIREMENTS
Less than
10' (3 m)
10'
(3 m)
3' (914 mm)
Min.
2’ (610 mm) Min.
(914 mm)
Min.
3'
NEGATIVE PRESSURE WARNING
The chimney must extend 3’ (.92m) above the level of roof penetration
and a minimum of 2’ (.61m) higher than any roof surface within 10’
(3m) (see below). Check with your local building officials for additional
requirements for your area.
Figure 1 - Chimney Height Requirements
To pass inspection in nearly any jurisdiction, the chimney must meet both
safety and exhaust flow requirements. The (3’ by) 2’ by 10’ rule applies
to both masonry and factory-built chimneys.
* Ref. USA - National Standard, NFPA 211-latest edition and Canada
National Standard CSA B365-01-latest edition. Vents installed with a
listed cap shall terminate in accordance with the terms of the cap’s
listings.
This appliance is not designed to be operated in a negative pressure.
In very airtight homes with large kitchen exhaust fans, furnace cold air
returns, fresh air exchange systems and any other air system in close
proximity to the heating appliance may create a negative pressure in the
same room as the heating appliance. This can create dangerous back
drafting of the stove and chimney joints, drawing combustion by-products
into the home. Be sure your home has adequate makeup air to eliminate
negative pressures caused by the above-mentioned sources. Outside air
connected to the appliance probably will not resolve such a problem as
the stove or fireplace insert is not the source of negative pressure. Lennox
Hearth Products accepts no liability for damages resulting from negative
pressures described here.
Ventilation Requirements - Provide adequate air for combustion. The
fresh air requirements of this appliance must be met within the space
where it will be installed. Ventilation is essential when using a Solid-FuelBurning heater. In well insulated and weather tight homes, it may be
difficult to establish a good draft up the chimney (caused by a shortage
of air in the home). The lack of air is caused by many common household
appliances which exhaust air from the home (such as a furnace, heat
pump, air conditioner, clothes dryer, exhaust fans, fireplaces, and other
fuel burning appliances). Also, the combustion process of this heater
uses oxygen from inside the dwelling. If the available fresh air delivery
in the dwelling is insufficient to support the demands of these appliances,
problems can result (e.g. excessive negative pressure can develop in the
dwelling which will affect the rate at which this appliance can draft thus
resulting in performance problems). To correct this problem it may help
to open a window (preferably on the windward side of the house) or install
an optional outside air kit.
Safety and General
Planning Installation
Planning Installation
Installation
Operation
Maintenance
Troubleshooting
Parts / Accessories
5
CLEARANCES TO COMBUSTIBLES
WARNING: BE ABSOLUTELY SURE THE DISTANCE BETWEEN
THE HEATER AND THE SURFACE OF ANY COMBUSTIBLE CONSTRUCTION IS NOT LESS THAN SHOWN IN THE FIGURES ON
PAGE 7 FOR MODEL GV230 WOODSTOVE AND ON PAGE 8 FOR
MODEL GV300 WOODSTOVE.
Floor Protection
Chimney and Connector
Minimum 6" diameter, minimum 24 MSG black steel connector pipe with
UL103HT listed factory-built chimney suitable for use with solid fuels
or masonry chimney. Horizontal connection not tested, refer to local
building codes for installation. See installation instructions for details.
Restrictions apply! Read instructions before installing.
Residential chimney systems must be from the same brands as listed
for mobile homes but connector pipe may be double wall, single wall,
or single wall with shield as listed.
USA - The floor in front and under the heater must be protected with
noncombustible material. The covering must extend 16” in front of the
door opening of the heater and 8” to either side of the door opening.
Canada - The floor in front and under the heater must be protected with
noncombustible material. The covering must extend 450 mm in front of
the door opening of the heater and 200 mm to either side of the stove
body and 200 mm to the rear or to the wall, whichever is smaller.
USA and Canada - A chimney connector / venting extends horizontally
over the floor, protection must also cover the floor under the connector
/ venting and at least 2” (51 mm) to either side.
Alcove Installations USA and Canada - The floor protection must be a
thermally rated non-combustible floor protector. See Page 9 for GV230
stoves or Page 10 for GV300 stoves for details on determining acceptable floor protection materials or hearth pads for alcove installations.
Alcove Installation
Clearances - In alcove installations, only 6” double wall connector pipe
can be used (single wall or single wall pipe with shield is not allowed).
This appliance may be vented into a code-approved masonry chimney
with flue liner.
WARNING: CHIMNEY CONNECTOR MUST BE IN GOOD CONDITION AND
KEPT CLEAN. DO NOT INSTALL DAMAGED PARTS.
All of the stove connector pipe used must be of the same brand. The
chimney that the stove pipe transitions into may be a different brand.
Other than the transition of the stove pipe into the chimney, do Not mix
different brand vent components. Install all vent components per vent
manufacturer’s instructions.
The chimney connector shall not pass through an attic or roof space,
closet or similar concealed space, or a floor, or ceiling. Where passage
through a wall, or partition of combustible construction is desired, the
installation shall conform to CAN/CSA-B365, Installation Code for SolidFuel-Burning Appliances and Equipment.
There must be an effective vapor barrier at the location where the chimney
or other component penetrates to the exterior of the structure. Follow
the vent manufacturer's detailed instructions.
IMPORTANT NOTE: See Draft Requirements and Selecting a Proper
Venting System on Page 4 to assist you in choosing the proper venting
system for your installation.
Clearance dimensions are to flue collar. If a single wall connector pipe
with shield is used, a 1 inch air space is needed between pipe and shield.
Shield attaches to rear of stove pipe and must run from stove top to
ceiling. Pipe shield shall be UL listed.
Thermal Floor Protection
GV230 - Thermal floor protection is only required where the stove is
installed into an alcove.
GV300 - Thermal floor protection is required in all installations.
6
Components Required For Installations
Legs OR Pedestal Assembly.
Use all required components specified for this appliance. Do
not substitute.
WARNING: In the event that you remove the blower for any
reason, make sure a cover plate (available from Lennox Hearth
Products) is installed before using the heater. Note: The cover
plate is not necessary if a blower has never been installed
because a knock-out will be in place to act as the cover.
Grandview™ GV230
INSTALLATION CLEARANCES - REFER TO FIGURES 2, 3 AND 4
Alcove or Parallel Installation
B
C
D
Combustible Wall
Floor
Protection
USA
Stove
E †
J
Combustible Wall
L
A
†
Elbow
K
E †
USA
Alcove or Parallel Installation
Alcove Depth
48" (1219mm) MAX.
U
Alcove
Elbow
I
H
M
Floor
Protection
Stove
T
Corner Installation
Combustible
Stove
K
G
F
G
F
Wall
Floor
Protection
Top View
† See note 8
Figure 2 - GV230
USA
- inches (millimeters)
PIPE INSTALLATION A (3) B (1) C (3) D (1) E (8) F (1,4) G(3,4) H (2) I (6) J (2) K (7) L (5) M T (6) U
5- In corner applications, when installed at minimum
back wall clearances, the required floor protection
is dimensioned off the back plane of the stove,
therefore the floor protection required off the
back corners (at a 45 degree angle) only needs to
extend to the wall. This situation will only occur in
CANADA installations.
6- Reference dimension only, to assist in planning the
installation.
7- Measured from front of floor protection to the front of
firebox.
8- USA=8” (200mm) from door opening, Canada=8”
(200mm) from sides and back of unit.
4- Not applicable to alcove installations.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Maintenance
Troubleshooting
Parts / Accessories
7
Grandview™ GV300
INSTALLATION CLEARANCES - REFER TO FIGURES 5, 6 AND 7
Alcove or Parallel Installation
B
C
D
Combustible Wall
Floor
Protection
USA
Stove
E †
J
Combustible Wall
L
A
†
Elbow
K
E †
USA
Alcove or Parallel Installation
Alcove Depth
48" (1219mm) MAX.
U
Alcove
Elbow
I
H
M
Floor
Protection
Stove
T
Corner Installation
Combustible
Stove
K
G
F
G
F
Wall
Floor
Protection
Top View
† See note 8
Figure 5 - GV300
USA
- inches (millimeters)
PIPE INSTALLATION A (3) B (1) C (3) D (1) E (8) F (1,4) G(3,4) H (2) I (6) J (2) K (7) L (5) M T (6) U
only. Actual distances should be measured from the
stove’s flue collar.
the flue collar of the stove.
15
8 6 17 51-1/8 55-1/2 41-1/8 18 8 84 64-7/8 N/A
16
8 6 17 51-1/8 59-1/8 41-1/8 18 8 84 64-7/8 19
14
8 5 16 51-1/8 51-1/8 41-1/8 18 8 84 63-7/16 10
16
8 N/A N/A 51-1/8 53-1/8 41-1/8 18 8 72 N/A N/A
5- In corner applications, when installed at minimum
back wall clearances, the required floor protection
is dimensioned off the back plane of the stove,
therefore the floor protection required off the
back corners (at a 45 degree angle) only needs to
extend to the wall. This situation will only occur in
CANADA installations.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
6- Reference dimension only, to assist in planning the
installation.
7- Measured from front of floor protection to the front of
firebox.
8- USA=8” (200mm) from door opening, Canada=8”
(200mm) from sides and back of unit.
Grandview™ GV230
ALCOVE INSTALLATIONS - FLOOR PROTECTION
When the Grandview™ 230 is installed in an Alcove, the floor protection
must be a thermally rated non-combustible floor protector meeting or
exceeding a thermal rating of k=.47 or equivalent with a listed thickness
of 1/2" (12.7 mm) minimum in the USA and Canada. The thermal protection must extend 16” in front of the heater and 8” to each side (measured
from the door opening).
Using Alternate Material As Floor Protection
The floor protection or alternate material used as a floor protector must
be constructed of a durable noncombustible material having an equal or
better thermal conductivity value (lower k value) of k =.47 BTU/IN FT2 HR
°F or a thermal resistance that equals or exceeds r = 2.13 HR °F FT2 IN/
BTU with a minimum thickness of 1/2”. With these values, determine the
minimum thickness of the alternate material required using the formula(s)
and shown in Table 1.
Note: Any noncombustible material having a minimum thickness of
1/2”(12.7mm) whose k value is less than .47 or whose r value is more
than 2.13 is acceptable. If the alternate material used has a higher k value
or lower r value will require a greater thickness of the material used. In
some cases, if the k value is less or the r value higher, a thinner material
may be used.
Methods of determining floor protection equivalents:
To determine the thickness required for the alternate material when
either the "k" value or "r" value is known, use either the k formula or r
formula.
Example: If Micore 160 Mineral Fiber Board is to be used for the
floor protection, how thick must this material be?
k
= k value per inch of alternate material
M
rM = r value per inch of alternate material
TM = minimum thickness required for alternate material
T
= standard thickness of the alternate material
S
k
= k value per inch of listed material
L
rL = r value per inch of listed material
= minimum thickness of listed material
T
L
Note: An asterisk "*" indicates, it is a value taken from Table 1.
Using the k formula:
k formula:
Minimum k-value (per Inch) of Specified min.
thickness of = alternate material (k
alternate k-value (per inch) of listed
material (T
(inches) = kMx TL
T
M
) of listed material (kL) material (TL)
M
*.47
(inches) = *.35 x .50"
T
M
*.47
.312 (inches)= .745 x .50"
Answer - The minimum required thickness of the Micore 160 is .372"
therefore round up to nearest standard thickness available which is
3/8” (.375”)
) x thickness
M
Using the r formula:
Minimum r-value (per Inch) Specified min.
thickness of = of listed material x thickness
alternate r-value (per inch) of listed
material of alternate material material
(inches) =
T
M
r
(inches) = *2.13 x .50"
T
M
r
Lx T
M
L
*2.86
.312 (inches)= .745 x .50"
Answer - The minimum required thickness of the Micore 160 is .372"
therefore round up to nearest standard thickness available which is
3/8” (.375”)
Listed Material
k (per inch) r (per inch)Listed Min. Thickness
Listed Material .47
** Approved Alternate Materials for Floor/Hearth Protection
Alternative MaterialsThermal ValuesMinimum Thickness
Kaowool M Board.472.13.5" (1/2")
Micore 160™
U.S. Gypsum
Micore 300™
U.S. Gypsum
Durock™ Cement Board
U.S. Gypsum
Hardibacker™1.95.512.07" (2-1/8")
Hardibacker 500™2.30.432.45" (2-1/2")
Cultured Stone Hearthstone™
Wonderboard3.23.313.44" (3-1/2")
Super Firetemp M
Johns-Manville
Super Firetemp L
Johns-Manville
Face brick9.00.1119.57" (9-5/8")
Common brick5.00.205.32” (5-3/8")
Cement mortar5.00.205.32” (5-3/8”)
Ceramic tile12.5.0813.30" (13-3/8")
Marble~11~.0911.70" (11-3/4")
K
L
k (per inch)
K
M
.352.86.37" (3/8")
.462.17.49" (1/2")
1.92.522.04" (2-1/8")
2.82.353" (3")
.611.64.65" (3/4")
.541.85.57" (5/8")
2.13
r
L
r (per inch)
r
M
1/2" (.50")
T
L
(rounded to nearest 1/8 inch)
Min. Thickness
T
M
Table 1 - USA AND CANADA REQUIREMENTS - GV230
** If the hearth extension material(s) that is intended to be used is NOT
listed on Table 1, the material can still be used if the material(s) is noncombustible. However, the manufacturer of the material must provide
either the listed k-value per inch or r-value per inch with listed thickness
so that the minimum thickness required for the hearth can be calculated
(per instructions here or as specified in the NFI Certification Manuals).
Note: Also see NFI (National Fireplace Institute) Certification Manuals showing other acceptable calculation methods and acceptable alternate materials
which can be used.
Safety and General
Planning Installation
Planning Installation
Installation
Operation
Maintenance
Troubleshooting
Parts / Accessories
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
9
Grandview™ GV300
FLOOR PROTECTION
The Grandview™ 300 floor protection must be a thermally rated noncombustible floor protector meeting or exceeding a thermal rating of
k=.47 or equivalent with a listed thickness of 1-1/2" (38.1mm) minimum
in the USA and Canada. The thermal protection must extend 16” in front
of the heater (measuring from the front of the firebox) and the the width
of the heater (26-1/2”).
Using Alternate Material As Floor Protection
The floor protection or alternate material used as a floor protector must
be constructed of a durable noncombustible material having an equal
or better thermal conductivity value (lower k value) of k =.47 BTU/IN
FT2 HR °F or a thermal resistance that equals or exceeds r = 2.13 HR
°F FT2 IN/BTU with a minimum thickness of 1-1/2”. With these values,
determine the minimum thickness of the alternate material required using
the formula(s) and shown in Table 2.
Note: Any noncombustible material having a minimum thickness of
1-1/2” (38.1 mm) whose k value is less than .47 or whose r value is
more than 2.13 is acceptable. If the alternate material used has a higher
k value or lower r value will require a greater thickness of the material
used. In some cases, if the k value is less or the r value higher, a thinner
material may be used.
Methods of determining floor protection equivalents:
To determine the thickness required for the alternate material when
either the "k" value or "r" value is known, use either the k formula or r
formula.
Example: If Micore 160 Mineral Fiber Board is to be used for the
floor protection, how thick must this material be?
k
= k value per inch of alternate material
M
rM = r value per inch of alternate material
TM = minimum thickness required for alternate material
T
= standard thickness of the alternate material
S
k
= k value per inch of listed material
L
rL = r value per inch of listed material
= minimum thickness of listed material
T
L
Note: An asterisk "*" indicates, it is a value taken from Table 2.
Using the k formula:
k formula:
Minimum k-value (per Inch) of Specified min.
thickness of = alternate material (k
alternate k-value (per inch) of listed
material (T
(inches) = kMx TL
T
M
) of listed material (kL) material (TL)
M
*.47
(inches) = *.35 x 1.50"
T
M
*.47
1.117 (inches)= .745 x 1.50”
Answer - The minimum required thickness of the Micore 160 is 1.117"
therefore round up to nearest total standard thickness - Example: Use
two 5/8” (.625”) boards for a total thickness of 1-1/4” (1.250”).
) x thickness
M
Using the r formula:
Minimum r-value (per Inch) Specified min.
thickness of = of listed material x thickness
alternate r-value (per inch) of listed
material of alternate material material
(inches) =
T
M
r
(inches) = *2.13 x 1.50"
T
M
r
Lx T
M
L
*2.86
1.117 (inches)= .745 x 1.50”
Answer - The minimum required thickness of the Micore 160 is 1.117”
therefore round up to nearest total standard thickness - Example: Use
two 5/8” (.625”) boards for a total thickness of 1-1/4” (1.250”).
Listed Material
k (per inch) r (per inch)Listed Min. Thickness
Listed Material .47
** Approved Alternate Materials for Floor/Hearth Protection
Alternative MaterialsThermal ValuesMinimum Thickness
Kaowool M Board.472.131.5" (1-1/2")
Micore 160™
U.S. Gypsum
Micore 300™
U.S. Gypsum
Durock™ Cement Board
U.S. Gypsum
Hardibacker™1.95.516.22" (6-1/4")
Hardibacker 500™2.30.437.34" (7-3/8")
Cultured Stone Hearthstone™
Wonderboard3.23.3110.3" (10-3/8")
Super Firetemp M
Johns-Manville
Super Firetemp L
Johns-Manville
Face brick9.00.11128.72" (28-3/4")
Common brick5.00.2015.96” (16")
Cement mortar5.00.2015.96” (16”)
Ceramic tile12.5.0839.89" (39-7/8")
Marble~11~.0935.12" (35-1/8")
K
L
k (per inch)
K
M
.352.861.12" (1-1/8")
.462.171.47" (1-1/2")
1.92.526.13" (6-1/8")
2.82.359" (9")
.611.641.95" (2")
.541.851.72" (1-3/4")
2.13
r
L
r (per inch)
r
M
1-1/2" (1.5")
T
L
(rounded to nearest 1/8 inch)
Min. Thickness
T
M
Table 2 - USA AND CANADA REQUIREMENTS - GV300
** If the hearth extension material(s) that is intended to be used is NOT
listed on Table 2, the material can still be used if the material(s) is noncombustible. However, the manufacturer of the material must provide
either the listed k-value per inch or r-value per inch with listed thickness
so that the minimum thickness required for the hearth can be calculated
(per instructions here or as specified in the NFI Certification Manuals).
NOTE: Also see NFI (National Fireplace Institute) Certification Manuals
showing other acceptable calculation methods and acceptable alternate
materials which can be used.
10
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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