CH{MNEY OR
GAS VENT _1
EQUIPMENT IN CONFINED SPACE
ALL AIR FROM OUTSIDE
(Inlet Air from Crawlspace and Outlet Air to Ventilated
Attic)
G24M
FURNACE
VENTILATION LOUVERS
(EaCh end of atdc)
WATER
HEATER
VENTILATION
LOUVERS
(For uni_ealed craw!
rrrrn rrrmi
NOTE- The inletand outJefairnpemngs shafteach have a free area of at leastone
square _ch {645 turn2) per 4,000 Btu (1.17 kW) per hour of thetotalinputrating of
a/! equipment in the enclosure.
FIGURE 2
EQUIPMENT IN CONFINED SPACE
ALL AIR FROM OUTSIDE
(All Air Through Ventilated Attic)
VENTILATIONLOUVERS
(Eachendof ate)
G24M
FURNACE
NOTE-The inletand outJetair openings8hall each havea
free area of at least one square inch (645 mm2)per 4,_0
Btu (1.17 kW}per hour of the total inputratingof all equip-
ment in the enstosure.
FIGURE 3
FIGURE 4
P_e7
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