OM-AF20.1 E V1.02
May 15, 2015
Page 13
AF20
.1
INSTALLATION INSTRUCTIONS cont.
COMBUSTION AIR
Insure adequate combustion air allowing for all other exhausting type appliances in the dwelling (range hoods,
dryers, etc.). In air tight homes and modern constructions, careful considerations must be taken into account
when using a wood burning appliance. Heat recovery ventilators (HRV) systems along with constant running
pan motors in air handlers must be taken into account when balancing the system. Failure to do so may result in
air starvation, smoke spillage and carbon monoxide threats. Consult a HVAC specialist for proper installation.
Ensure adequate combustion air allowing for all other exhausting type appliances in the dwelling (range hoods,
dryers, etc.). In airtight houses it is recommended to install a fresh air inlet into the room where the stove is
located, to prevent air starvation.
DRAFT
Draft in the chimney system is initiated by the air pressure diff erence between the top and bottom of the
chimney. Heat generated within the fi rebox will rise and accelerate the draft in the chimney. Recommended
draft is .05 in. w.c. operated on high. Too little draft results in a sluggish fi re and smoke spillage into the room
when the stove door is opened. Too much draft (over 0.06 in. w.c.) makes it unsafe to operate the stove and will
void manufacturers warranty.
ROLE OF THE CHIMNEY
Without a proper installed chimney, this appliance will not burn correctly.
Th
e role of the chimney is to pull the proper amount of air into the fi rebox for the purpose of complete
combustion. Incomplete combustion will lead to more smoke and pollution of the outside air. A proper
operating chimney will allow the user to enjoy peak performance at all burn operating levels from low to high.
Blaze King therefore recommends vertical installations with a minimum length of 15’ from stove top to chimney
cap. In all freestanding stove installations, use double wall stove pipe from the stove top to the ceiling support
box. Th
e use of double wall stove pipe does allow for reduced clearances, however most importantly, it helps to
keep the chimney warm and improve draft .
For wall exits, the same suggestion applies. With the addition of the recommendation to use two 45 degree
elbows rather than a single 90 degree elbow. Th
e use of two 45 degree elbows will allow for both a smoother
transition to the exterior chimney and will also shorten the horizontal run to the outside chimney. A minimum
36” rise is recommended prior to any elbows being used. When possible, outside chimney systems should be
isolated from direct exposure to winter weather by building a chase around the chimney, observing all clearances
as specifi ed by the venting manufacturer. Doing so will help to keep the chimney warmer and improve draft .
