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General Information
Intended Use Statement:
The Vent-Free fireplace is a modular refractory
masonry unit designed for field assembly. The unit consists
of interlocking precast parts which are glued together using
Earthcore Mortar supplied with the unit. The parts of the
system are cast using a proprietary mixture of volcanic pumice
aggregate and aluminate cement. Each piece is intended for a
specific part of the enclosure and is designed such that only
one means of assembly is possible. The system includes all
the parts necessary for the assembly of a complete masonry
unvented decorative gas log enclosure.
In addition to the basic enclosure, a minimum standard
one and one-eighth inch (1-1/8”) thick, high temperature
refractory brick is required to line the interior of the firebox.
Vent free decorative gas log sets are supplied by others
and are limited to any listed unvented gas-fired log sets with
heat input ratings up to 40,000 BTU/hr.
Product Description:
The Vent-Free fireplace has been evaluated and listed
by Intertek Testing Services (Warnock Hersey International) in
accordance with ANSI Z21.91-07 and is intended for use as
a “zero clearance” rated enclosure when used with any listed
unvented or dual listed gas log set that has a maximum input
rating of 40,000 BTU/hr. The vent free decorative gas logs
chosen must meet the appliance manufacturer’s minimum size
dimension requirements for installation in this enclosure.
WARNING: Any application other than the ‘intended use’
stated herein is in violation of the manufacturer’s instructions
and is hereby prohibited. Such violation may cause immediate
hazard, property damage or loss of life and will void all
liabilities to the manufacturer and will void all warranties
explicit or implied.
Clearance to Combustibles:
The Vent-Free fireplace may be installed at “zero
clearance” to plywood sheathing and to un-insulated wood
framing members at the unit bottom, sides, rear and top when
used for enclosing any listed unvented gas-fired log set with
maximum heat input ratings up to 40,000 BTU/hr. (Reference
Intertek Testing Services Report No. 13001A-764.)
However when a Vent-Free fireplace is to be installed
on carpeting, tile, or any combustible material other than wood
flooring or concrete, the Vent-Free fireplace shall then be
installed on a metal or wood panel extending the full width and
depth of the Vent-Free fireplace.
Note: Keep all insulation material to a minimum of three inches
(3”) away from the outside surfaces of the Vent-Free fireplace.
Clearance to Combustible Trim:
The Vent-Free fireplace is designed to be custom finished with
facing trim and mantle to be at owner option. However, all such
trim material must meet standard fireplace code requirements:
non-combustible facing material must be applied to a minimum
of eight inches (8”) beyond the sides of the finished opening of
the Vent-Free fireplace and
non-combustible facing material must cover a minimum
of twelve inches (12”) above the finished opening of the
installed unit. (Reference Intertek Testing Services Report
No. 13001A-764.)
Clearance to combustible trim are those distances
required to ensure that combustible mantle and facing
material will not be exposed to excessive heat while the unit
is operating. These clearances should be adequate to prevent
discoloration or warping of trim facings due to heat. However,
circumstances unique to each installation create variables that
may be beyond the scope of this manual. Therefore be sure to
follow gas log appliance manufacturer’s explicit installation
instructions regarding all minimum trim facing, mantle height
and side wall clearance requirements.
Note: Mantle height clearance requirements may vary among
gas log manufacturers.
Before Beginning the Installation: Read these instructions
carefully before beginning the installation of this Vent-Free
fireplace. Also read the gas log appliance manufacturer’s
literature regarding sizing and suitability for installation
into this enclosure prior to installation. ( Look for gas log
appliance manufacturer’s label “A.G.A. Certified Vent-
Free Gas Log. ”)
Since it is not possible to adequately define all
installation and use circumstances in this manual be sure to
check with and strictly adhere to local building codes and
ordinances governing installation, inspection and use of gas
fired equipment. In the absence of local codes the installation
and use of this Vent-Free fireplace - and the certified unvented
gas log appliance placed in it - must be in accordance with
each manufacturer’s explicit installation instructions and
must conform with National Fuel Gas Code, ANSI Z21.11.2,
NFPA 54.
Local building and safety codes shall govern issues
relating to the suitability of the use of unvented appliances
as well as to room size requirements. Prior to purchase and
installation it should be determined if unvented gas log heaters
are suitable to the proposed application where health matters
are concerned.
Note: You may need to provide combustion and ventilation air
from an outside source to adequately satisfy local codes.
Non-combustible hearth extensions are not required in front
of the Vent-Free fireplace. However it is the responsibility of
the installer to refer to the vent free gas log manufacturer’s
explicit installation instructions regarding their requirements
for noncombustible hearth extensions. Requirements may
vary among vent free gas log manufacturers.
Refer to local codes governing the need for hearth
extensions for vent free gas log enclosures.