Air For Combustion And Ventilation - Procom MN200EBC 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 con-
struction unless provisions are
provided for adequate combus-
tion and ventilation air. Read the
following instructions to insure
proper fresh air for this and
other 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)
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
additional fresh air.
Unusually tight construction is
defined as construction where:
a. W alls and ceilings exposed to
the outside atmosphere
continuous water vapor retarder
with a rating of one perm (6
per pa-sec-m 2 ) or less with openings
gasketed or sealed and
b. W eather stripping 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 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
the three criteria above, see Deter-
mining Fresh-Air Flow for Heater
Location, page 5.
× ×
width
cu.ft. (volume of space)
× ×
16ft.( width) 8ft. (ceiling height)=2560cu. ft. (volume of space)
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)
÷
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
put rating of all
stalled in that space and an uncon-
fined space as
have a
volume is not less than 50 cubic
×
feet per 1,000 Btu per hour (4.8 m
10 -11 kg
per kw) of the aggregate input rat-
ing of all
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 ai r.
*
ing only if there are doorless pas-
sageways or ventilation grills be-
tween them.
height).
5
per kw) of the aggregate in-
3
appliances in-
a space whose
appliances installed in
Adjoining rooms are communicat-
3
provisions