SCOTTY WOOD FURNACE – INSTRUCTION MANUAL
SCOTTY
3/31/2006
16
2.5 Clearances
(Fig S102-1)
The KERR SCOTTY Wood Furnace is to be installed in accordance with National
Building Code or local regulations. Allowances front and rear must be made for
cleaning and servicing.
NOTE:
Regardless of minimum clearances to combustibles for safety reasons, a
minimum clearance of 30 inches (765 mm) should be allowed at the
furnace rear for cleaning (due to length of cleaning rake) and access to
smoke pipe.
Minimum safety clearances to combustibles are:
Front
48”
1220 mm
One Side
6”
155 mm
Other Side (for rear access)
24” 610 mm
Rear (see Note above)
24”
610 mm
Flue Pipe to combustible, other furnace & electrical wiring
18”
457 mm
Wood Furnace Above Plenum and 6’(1.8 m) of duct
6”
153 mm
Supply Duct beyond 6’
2”
50 mm
Return Duct Plenum and 6’(1.8 m) of duct (Free standing)
6”
150 mm
These clearances will also allow adequate combustion air to reach the furnace.
WARM AIR DUCT & PLENUM CLEARANCES
The following clearances must be observed and must meet all local building,
electrical and fire codes. Follow the National Standard of Canada, Installation
Code for Solid Fuel Burning Appliances and Equipment, CSA-B365-01; the
National Board of Fire Underwriters and in the US the NFPA codes.
The KERR SCOTTY Wood Furnace warm air plenum and first 6 feet (1.8 m) of
warm air supply duct in any direction must be installed observing a minimum of 6
inches (155 mm) clearance from the joists or combustible materials. Beyond the
first 6ft (1.8 m) of supply duct, a 2 inches (55 mm) minimum clearance must be
maintained between the warm air supply ducts and all joists or combustible
material (See Fig. S102-1)
Return air ducts, including main ducts and branch ducts, on solid fuel burning
warm air furnaces shall be installed to provide at least 6 inches (150mm)
clearance to combustible construction for the first 6 feet (1.8 m) away from the
furnace plenum.
It is recommended that a non-combustible rigid board be fastened on the
underside of the floor joists in the area of the ceiling above the furnace, warm air
ducts and smoke pipe.
