HearthStone Quality Home Heating Products Inc SANTA FE Vent Free heater
FRESH AIR REQUIREMENTS
Your Santa Fe stove requires an adequate supply
of fresh air to function properly and safely. The
fresh air supply must be met within the space in
which the heater is to be installed. To ensure an
adequate supply of fresh air is available for
proper and safe operation of your Santa Fe
stove, the following information must be
considered when installing the appliance in a
mobile home, modular home, or an on-site
house, Refer to Figure 5.
The space in which the heater should be
installed will fall into one of the following
categories:
1. Unusually tight construction
2. Unconfined space
3. Confined space
WARNING: If the area in which the
heater may be operated is smaller than
that defined as an unconfined space,
provide adequate combustion and
ventilation air by one of the methods
described in the National Fuel Gas Code
ANSI Z223.1, Latest Edition, Section 5.3.
Determining Space Classification
Unusually tight construction
This is construction where:
a. Walls and ceilings exposed to the outside
atmosphere have a continuous water vapor
retarder with a rating of one perm (6 x 10G¹¹ kg
per pa-sec-m²) or less with openings gasketed or
sealed, and
b. Weatherstripping has been added on
openable windows and doors, and
c. Caulking or sealants are applied to areas such
as joints around window and door frames,
between sole plates and floors, between wall
ceiling joints, between wall panels, at
penetrations for plumbing, electrical, and gas
lines, and at other openings.
If the space in which the heater will be installed
falls into this category, supplemental fresh air
must be provided, as outlined in the Meeting
Fresh Air Requirements section of this manual.
Unconfined space
If the space in which the heater is to be installed
meets the following criteria, it is considered to
be an unconfined space.
The room in which the heater is to be installed
has an air volume of at least 50 cubic feet (cubic
feet = length x width x height of the space) for
each 1000 BTU/hr (4.8 m³ / K. W.) input rating
for all appliances in the space. This includes
adjoining rooms only if there are doorless
passageways between them, or there are vents
between the rooms. If the space in which the
unit is being installed is an unconfined space,
additional fresh air is not needed.
Confined space
If the space in which the heater is to be installed
meets the following criteria, it is considered a
confined space. The room in which the heater is
to be installed has an air volume of less than 50
cubic feet for each 1000 BTU/hr (4.8 m³ / K.
W.) input rating for all appliances in the space.
This includes adjoining rooms only if there are
doorless passageways between them, or there are
vents between the rooms.(See Figure 5).
If the space in which the heater is to be installed
is a confined space, additional fresh air must be
provided. This can be done by one of the ways
outlined in the Meeting Fresh Air
Requirements section of this manual.
Example (refer to Figure 5)
I. Determine the volume of the space where the
unit will be installed. Volume = length x width
x height. Also included in the volume of the
space is the volume of any adjoining rooms,
only if there are doorless passage ways between
them, or if there are vents between the rooms.
II. Multiply the volume by 1000 BTU/hr, then
divide that number by 50 cubic feet, to obtain
the total maximum BTU/hr rating which the
room can support.
III. Add the BTU/hr ratings of all fuel burning
appliances installed within the same space. The
BTU rating for this unit is 3900 BTU/hr. (Do not
