Bard Bayrd Furnace 403293A - Manual (Page 11)

NOTE: Level furnace from front to back and from left to right
within 1M" per four feet.
FURNACE, PLENUM, AND BASE INSTALLED ON A
COMBUSTIBLE FLOOR
FIGURE 9
SICTION S PROVIDING FOR COMBUSTION
AND ViNTILATION AIR.
Before you begin installing furnace, pian to provide enough
combustion and ventiiation air following:
— Current National Fuel Gas Code ANSI Z223.1/NFPA
54, Section 5;
— Local Code authorities. Refer to Section 31 of this
manual for these codes.
Ventilation is the process of replacing air which is required
for furnace operation. The total amount of ventilation air pro­
vided within structure must equal all requirements of gas ap­
pliances in the building, plus any air quantities removed by
range hoods, exhaust fans, etc.
Another reason to supply fresh outdoor air for combustion
and ventilation is that it dilutes contaminants found in indoor
air. These contaminants include bleaches, adhesives, clean­
ing solutions, detergents, solvents, cat litter, spray can pro­
pellants and most refrigerants.
WARNINDi Furnace and any other fuel-burning appli­
ances must have enough fresh air for propsr combus­
tion and ventilation. Lack of adequate combustion and
ventilation air could cause nausea or asphyxiation, re­
sulting in injury or death.
WARNINOi During construction, do not use air from
inside structure for combustion and ventilation. Vapors
from soma construction adhesives and materials can be­
come corrosive in the presence of a flame. This could
cause failure of heat exchanger or vent system, result­
ing in damage. Injury or death.