Air For Combustion And Ventilation - Procom MN200EPC Owner's Operation And Installation Manual

AIR FOR COMBUSTION
AND VENTILATION
WARNING: This heater shall
not be installed in a confined
space or unusually tight
struction unless provisions are
provided for adequate
tion and ventilation air. Read the
following instructions to insure
proper fresh air for this and
fuel-burning appliances in your
home.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from
National Fuel Gas Code. NFPA
54/ANSI Z223.1, Section 5.3. Air
for Combustion and Ventilation.
All spaces in homes fall into one
of the three following ventilation
classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
The information on pages 5
through 6 will help you classify
your space and provide adequate
ventilation.
DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION
Determining if you have a Confined or Unconfined Space*
Use this worksheet to determine if you have a confined or unconfined space.
Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways
or ventilation grills between the rooms.
1. Determine the volume of the space (length
× ×
Length Width Height=
Example: Space size20ft. (length)
If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms
to the total volume of the space.
2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.
(volume of space)
Example: 2560 cu. ft. (volume of space)
WARNING: If the area in which the heater may be operated is smaller than that defined as an
unconfined space or if the building is of unusually tight construction, provide adequate combustion and
ventilation air by one of the methods described in the National Fuel Gas Code, ANS Z223.1, Section 5.3
or applicable local codes.
Unusually Tight Construction
The air that leaks around doors and
windows may provide enough fresh

air for combustion and ventilation.

However, in buildings of unusually
tight construction, you must provide
con-
additional fresh air.
Unusually tight construction is
combus-
defined as construction where:
a. W alls and ceilings exposed to
the outside
other
continuous water vapor retarder
with a rating of one perm (6
per pa-sec-m
openings gasketed or sealed and
b. Weather
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 your home meets
all of the three criteria above, you
must provide additional fresh air.
See Ventilation Air From Outdoors,
page 6.
If your home does not meet all of
th e t hree
Determining Fresh-Air Flow for
Heater Location, page 5.
×
cu.ft. (volume of space)
×
16ft.( width)
50 cu. ft.=(Maximum Btu/Hr the space can support)
÷
50 cu.ft.=51.2 or 51.200(maximum Btu/Hr the space can support)
÷
atmosphere have
×
10
-11
2 ) o r less with
stripping has been
crit eria ab ove, see
×
width height).
×
8ft. (ceiling height)=2560cu. ft. (volume of space)
5
Confined and
Unconfined Space
The National Fuel Gas Code ANSI
Z223.1 defines a confined space as
a space whose volume is less than
50 cubic feet per 1,000 Btu per hour
(4.8 m 3 per kw) of the aggregate
input rating of all
stalled in that space and an uncon-
fined space as
a
volume is not less than 50 cubic
feet per 1,000 Btu per hour (4.8 m
kg
per kw) of the
rating of all appliances installed in
that space. Rooms communicating
directly with the space in which the
appliances are installed*, through
openings not furnished with doors,
are considered a part of the uncon-
fined space.
This heater shall not be installed
in a confined space or unusually
tight construction unless
are provided for adequate combus-
tion and ventilation air.
*
Adjoining rooms are
cating only if there are doorless
passageways or ventilation grills
between them.
appliances in-
a space whose
3
aggregate input
provisions
communi-