Codes; Adequate Combustion And Ventilation Air - Vermont Castings DFS3224A Installation And Operating Instructions Manual

GENERAL INSTALLATION INFORMATION

CODES

Adhere to all local codes or, in their absence, the latest edition of THE NATIONAL FUEL GAS CODE ANSI Z223.1
or NFPA54 which can be obtained from...
Do not install the heater ...
• Where curtains, furniture, clothing, or other fl ammable objects are less than 42"
from the front of the heater.
• In high traffi c areas.
• In windy or drafty areas.

ADEQUATE COMBUSTION AND VENTILATION AIR

This heater shall not be installed in a confi ned space or unusually tight construction unless provisions are provided
for adequate combustion and ventilation air.
The National Fuel Gas Code, (ANSI Z223.1/NFPA54), defi nes a confi ned space as a space whose volume is less than 50
cubic feet per 1,000 BTU per hour (4.8 m
space, and an unconfi ned space as a space whose volume is not less than 50 cubic feet per 1,000 BTU per hour (4.8
m 3 per kw) of the aggregate input 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 unconfi ned space.
UNUSUALLY TIGHT CONSTRUCTION IS DEFINED AS CONSTRUCTION WHERE...
a) walls and ceilings exposed to the outside atmosphere have a continuous water vapor retarder with a rating of 1 perm
11
(6 x 10 kg per pa/sec-m
b) weather striping 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 fl oors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and gas
lines, and at other openings.
10
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
3
per kw) of the aggregate input rating of all appliances installed in that
2
) or less with openings gasketed or sealed;
or
26D3310