Owner`s manual

30816-3-0113Page 10
VENTILATION AIR
Ventilation Air From Inside Building
Thisfreshairwouldcomefromanadjoiningunconnedspace.When
ventilatingtoanadjoiningunconnedspace,youmustprovidetwo
permanent openings: one within 12" of the ceiling and one within
12"oftheooronthewallconnectingthetwospaces(seeoptions
1 and 2, Figure 5). You can also remove door into adjoining room
(see option 3, Figure 5). Each ventilation grill or opening shall have
aminimumfreeareaofonesquareinchper1,000BTU/HRofthe
totalinputratingofthegasequipmentintheconnedspace.
Figure 5
WARNING
Rework worksheet, adding the space of the adjoining

fresh air to supply all appliances in both spaces.
Ventilation Air From Outdoors
Provideextrafreshairbyusingventilationgrillsorducts.Youmust
provide two permanent openings: one within 12" of the ceiling and
onewith12"oftheoor.Connecttheseitemsdirectlytotheoutdoors
or spaces open to the outdoors. These spaces include attics and
crawl spaces. In most cases for direct communication with the
outdoors or direct communication through a vertical duct a free
areaopeningofonesquareinchper4,000BTU/HRofheaterinput
rating for each grill. If a horizontal duct is used, a grill free area or
ductopeningshallhaveafreeareaopeningofonesquareinchper
2,000 BTU/HR for each grill. Follow the National Fuel Code, ANSI
Z223.1/NFPA 54, Air for Combustion and Ventilation, or applicable
local codes,forrequiredsizeofventilationgrillsorducts.
IMPORTANT: Do not provide openings for inlet or outlet air into attic
if attic has a thermostat-controlled power vent. Heated air entering
the attic will activate the power vent.
Figure 6
PROVISIONS FOR ADEQUATE COMBUSTION & VENTILATION AIR
CONNECTING THE GAS
The inlet connection is located on the right side of the gas valve.
Attach gas inlet line to gas valve.
IfinstallingtheanOptionalBlower,itmustbeinstalledbefore
connecting the gas line.