Installation Guide

6
DETERMINING FRESH-AIR FLOW
FOR APPLIANCE LOCATION
Determining if You Ha
Use this work sheet to determine if you have a
Includes the room in which you will install -
ance any adjoining rooms with doorless
Determine the volume of the (length x width x
Length x Width x Height =
size 22 (length) x 18 (width) x
If additional ventilation to adjoining room is
with grills or add the volume of these rooms
Multi ly the s ace volume by 20 to determine the maxi-
_______ (volume of s ace) x 20 = (Maximum Btu/Hr
the s ace can s )
ft (volume of s ace) x 20 =
(maximum Btu/Hr t can s ort)
Add the Btu/Hr of all fuel burning in the
Vent-free log set _______________ Btu/Hr
Gas water heater* ______________ Btu/Hr
Gas furnace ___________________ Btu/Hr
Vented gas heater ______________ Btu/Hr
______________ Btu/Hr
+ ________ Btu/Hr
Total = ________ Btu/Hr
* Do not include direct-vent gas lian Direct-vent
draws combustion air from the outdoors and vents to
Vent-free log set ______________ Btu/Hr
Gas water heater* _____________ Btu/Hr
Total = ________ Btu/Hr
Com are the maximum Btu/Hr the can ort with
____
____
Btu/Hr (maximum the can -
The in the above is a because
the actual Btu/Hr used is more than the maximum Btu/Hr
the can You must additional fresh
Rework work sheet adding the s ace of an adjoining room
If the extra an remove
door to adjoining room or add ventilation grills between
Ventilation Air from Inside Building
Vent room directly to the See Ventilation Air
from Outdoor
Install a lower Btu/Hr if lower Btu/Hr size
If the actual Btu/Hr used is less than the maximum Btu/Hr
the can the is an
AIR FOR COMBUSTION
AND VENTILATION
WARNING: If the area in which the
heater may be not meet the
volume for comb
air, comb ventilation air be
ro by one of the
in the National Fuel Ga Co , ANSI Z223.1/
NFPA 54, the International Fuel 
b
CONTINUED