Installation; Outside Air; Chimney Height - Vermont Castings 1975 Owner's Manual

Defiant FlexBurn 1975 Non-Catalytic / Catalytic Wood Burning Stove
® ®

Installation

SAFETY NOTICE: IF YOUR DEFIANT
INSTALLED, A HOUSE FIRE MAY RESULT. TO REDUCE
THE RISK OF FIRE, FOLLOW THE INSTALLATION
INSTRUCTIONS. CONTACT LOCAL BUILDING OR FIRE
OFFICIALS ABOUT RESTRICTIONS AND INSTALLATION
INSPECTION REQUIREMENTS IN YOUR AREA.
Before you begin an installation, be sure that:
•
Your stove and chimney connector will be far enough from
combustible material to meet all clearance requirements.
•
The floor protector is large enough and is constructed
properly to meet all requirements.
•
You have all necessary permits from local authorities.
Your local building official is the final authority for approving
your installation as safe and determining that it meets local
and state codes.
The metal label permanently attached to the back of every
Vermont Castings' stove indicates that the stove has been
tested to current UL and ULC standards, and gives the
name of the testing laboratory. Clearance and installation
information also is printed on the label. When the stove is
installed according to the information both on the label and
in this manual, local authorities usually will accept the label
as evidence that the installation meets codes and can be
approved.
However, codes vary in different areas. Before starting the
installation, review your plans with the local building author-
ity. Your local dealer can provide any additional information
needed.
For any unresolved installation issues, refer to the National
Fire Protection Association's publication ANSI/NFPA 211
Standard for Chimneys, Fireplaces, Vents and Solid Fuel
Burning Appliances. For Canada, the equivalent publication
is CSA CAN-B365 Installation Code for Solid Fuel Burning
Appliances and Equipment. These standards are the basis for
many national codes. They are nationally recognized and are
accepted by most local authorities. Your local dealer or your
local building official may have a copy of these regulations.
IMPORTANT: Failure to follow these installation instruc-
tions may result in a dangerous situation, including a
chimney or house fire. Follow all instructions exactly,
and do not allow makeshift compromises to endanger
property and personal safety.
5
IS NOT PROPERLY
®
Vermont Castings • Defiant Flexburn Installation & Operating Manual_R32 • 04/17

Outside Air

In some modern, super-insulated homes, there may be
inadequate air supply for combustion because of insufficient
air infiltration into the building. Such air enters a home through
unsealed cracks and openings. Exhaust fans in kitchens or
bathrooms can compete with the stove for available air and
compound the problem.
When poor draft is caused by a low infiltration rate, opening a
ground floor window on the windward side of the house and
near the stove will usually alleviate the problem.
A better solution is to install a permanent outside air supply
to the stove and/or room. In fact, bringing air for combustion
from outside the home directly to the air inlet of the stove is
required for new construction in some areas.
Pressure variations within the house do not affect a stove
equipped with an outside air supply, and improved stove
performance often results. An Outside Air Kit for the Defiant
is available from your local dealer.

Chimney Height

Altitude affects chimney performance. When using an 8" oval
to 6" flue collar adapter on the Defiant
suggested chimney heights at various altitudes. Chimney
height should be measured from the flue collar to the top of
the chimney. The recommended minimum chimney height
is 16' (5 m).
30
25
20
15
0 2000 4000
Figure 2 - Chimney height requirements with 6" chimney and/or
chimney connector.
ST491
Defiant
chimney height
11/2/00 djt
, refer to Figure 1 for
®
6000 8000 10000 12000
Altitude
3-90-30005220
®