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8390-975
Vermont Castings • Defiant® Model 1975-CAT-C Installation Manual_R8 • 02/21
SAFETY NOTICE: IF YOUR APPLIANCE IS NOT PROPERLY
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 authority.
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
instructions 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.
A. Outside Air
A source of air (oxygen) is necessary in order for combustion
to take place. Whatever combustion air is consumed by the
fire must be replaced. Air is replaced via air leakage around
windows and under doors. In homes that have tightly sealed
doors and windows, an outside air source is needed.
Items Needed for Installation (not supplied)
• Outside air adapter (available at your authorized
Vermont Castings dealer)
• Phillips head screw driver
• Silicone sealant
• 3” Flex or Rigid Duct
• 3” Outside Air Termination Cap with Screen
• Hose Clamps
• Drills and saws necessary for cutting holes through
the wall or flooring in your home.
1. Using a #2 Phillips screw driver attach the flex adapter to
the appliance using 4 screws.
2. Floor & Rear Installation: Cut a 3” (76 mm) hole in outside
wall or floor to accommodate outside air piping. Use 3”
(76 mm) aluminum metal flex or rigid piping to directly
connect outside air to appliance intake. Use the supplied
termination cap with a rodent screen. Seal between the
wall (or floor) and the pipe with silicone to prevent moisture
penetration.
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.
B. Types of Chimney to Use
You must connect this appliance to a code-approved masonry
chimney with a flue liner, to a relined masonry chimney that
meets local codes, or to a prefabricated metal chimney that
complies with the requirements for Type HT chimneys in the
Standard for Chimneys, Factory-Built, Residential Type and
Building Heating Appliance, UL 103. Figure 2 illustrates the
two types. The chimney and chimney connector must be in
good condition and kept clean.
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Important Safety Information
