Rheem R95P Installation Instructions Manual page 53

GENERAL VENTING REQUIREMENTS AND
NON-DIRECT VENT (cont.)
METHOD 1:
Two permanent openings, one located within 12 inches of the
top and one located within 12 inches of the bottom of the en-
closure, shall be provided. The openings shall communicate
! !
directly, or by ducts, with the outdoors or spaces (crawl or
attic) that freely communicate with the outdoors.
!
! !
A. Where directly communicating with the outdoors through
an opening or where communicating to the outdoors through
!
vertical ducts as shown in Figure 14, each opening shall
have a minimum free area of 1 square inch for each 4,000
! !
BTUH of total appliance input rating of all equipment in the
enclosure. Table 8 below specifies the minimum area for
!
T BLE 8: MINIMUM FREE RE REQUIRED ',9-%*DF**0(&(0/0*E+%%*,+%,*+%./(+%2*
FOR E CH OPENING (WHEN TWO OPENINGS E8+*%,7?*8:%&(&)*GJ?%&*'J8*8:%&(&)1*
,+%*/1%2H*J('?*,*E/+&,7%F************************** RE USED) WITH
1. LOC TED IN CONFINED SP CE
!;**-87,'%2*(&*,*78&E(&%2*1:,7%*****************
2. USING OUTDOOR IR FOR COMBUSTION
";**/1(&)*8/'288+*,(+*E8+*7809/1'(8&****************************************************
3. COMMUNIC TING DIRECTLY TO THE
#;**7800/&(7,'(&)*2(+%7'-C*'8*'?%*
3. OUTSIDE THROUGH N OPENING OR
8/'1(2%*'?+8/)?*,&*8:%&(&)*8+*
3. THROUGH VERTIC L DUCT.
'?+8/)?*,*$%+'(7,-*2/7';*
EUTT*,UTR*h\U*
'\SRW*(][cS*h\U* %RYZ*8[T]V]^*
,--*)RX* iZT]*"*1T[RURST*
,[[WVR]YTX* 8[T]V]^X*RUT*
G9'/?H* cXTe*GXb*V]YZTXH*
ZO>[[[!
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Fa>[[[!
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_[>[[[!
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!
`Z>[[[!
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! ^`>[[[! ! ! ! ! ! !
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PPO>[[[!
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!
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! ! !
T BLE 9: MINIMUM FREE RE REQUIRED ',9-%*!IF**0(&(0/0*E+%%*,+%,*+%./(+%2*
! !
! ! ! !
FOR E CH OPENING (WHEN TWO OPENINGS E8+*%,7?*8:%&(&)*GJ?%&*'J8*8:%&(&)1*
! ! ! ! !
! ! ! !
,+%*/1%2H*J('?*,*E/+&,7%F*************************** RE USED) WITH
! ! ! ! !
1. LOC TED IN CONFINED SP CE
!;**-87,'%2*(&*,*78&E(&%2*1:,7%*****************
! ! !
2. USING OUTDOOR IR FOR COMBUSTION
";**/1(&)*8/'288+*,(+*E8+*7809/1'(8&****************************************************
3. COMMUNIC TING DIRECTLY TO THE
#;**7800/&(7,'(&)*2(+%7'-C*'8*'?%*
3. OUTSIDE THROUGH
8/'1(2%*'?+8/)?*,*?8+(=8&',-*2/7';*
EUTT*,UTR*h\U*
'\SRW*(][cS*h\U* %RYZ*8[T]V]^*
,--*)RX* iZT]*"*1T[RURST*
,[[WVR]YTX* 8[T]V]^X*RUT*
G9'/?H* cXTe*GXb*V]YZTXH*
ZO>[[[!
Fa>[[[!
_[>[[[!
`Z>[[[!
^`>[[[!
PPO>[[[!
!
!
! * *
!
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!
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FURN CE:
+\c]e*:V[T*2cYS*
2VR_TSTU*G$TUSVYRW*
2cYS*8]WaH*GV]YZTXH*
P[! Z!
PF! F!
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O[! F!
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OF! F!
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* OF! ! !!) ! ! * ! ! ! ! F! ! ! ! ! !
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G[! a!
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FURN CE:
! ! ! ! ! !
! ! ! ! !
HORIZONT L DUCT.
+\c]e*:V[T*2cYS*
2VR_TSTU*
G?\UVf\]SRW*2cYS*
8]WaH*GV]YZTXH*
OP! a!
O`! a!
GF! _!
ZO! `!
Z^! `!
Fa! ^!
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each of the 2 combustion air openings and minimum round
duct diameter for direct openings and vertical ducting only.
B. Where communicating with the outdoors through horizon-
tal ducts, each opening shall have a minimum free area of 1
square inch for each 2,000 BTUH of total appliance input rat-
ing of all equipment in the enclosure (see Figure 15). Table 9
& ! !
specifies the minimum area for each of the 2 combustion air
! ! !
openings and minimum round duct diameter for horizontal
! & ! ! !
ducting only.
!
!
! ! !
!
METHOD 2:
!
One permanent opening located within 12 inches of the top of
! ! ! !
the enclosure, shall be permitted where the equipment has
& ! !
! ! !
clearances of at least 1 inch from the sides and back and 6
! ! !
!
inches from the front of the appliance. The opening shall di- ! !
! !
rectly communicate with the outdoors or communicate
! !
!
! ! !
!
T BLE 10: MINIMUM FREE RE REQUIRED ',9-%*!!F**0(&(0/0*E+%%*,+%,*+%./(+%2*
! !
FOR N OPENING (WHEN ONE OPENING IS E8+*,&*8:%&(&)*GJ?%&*8&%*8:%&(&)*(1*
! ! !
!
USED) WITH
/1%2H*J('?*,*E/+&,7%F*********************************************************
1. LOC TED IN
!;**-87,'%2*(&*,*78&E(&%2*1:,7%*****************
2. USING OUTDOOR IR FOR COMBUSTION
";**/1(&)*8/'288+*,(+*E8+*7809/1'(8&********************
3. COMMUNIC TING DIRECTLY TO THE
#;**7800/&(7,'(&)*2(+%7'-C*'8*'?%*
3. OUTSIDE.
8/'1(2%;*
'\SRW*(][cS*h\U*
,--*)RX*
,[[WVR]YTX*
G9'/?H*
!
ZO>[[[!
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Fa>[[[!
!
!
_[>[[[!
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`Z>[[[!
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^`>[[[!
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!
PPO>[[[!
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!
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!
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!
FIGURE 13
! ! !
NON-DIRECT VENT
! ! !
AIR FROM
!
!
!
HEATED
!
! ! ! ! !
SPACE
!
! ! ! !
!
!
! !
!
!
!
!
!
GUIDELINES
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! ! ! ! !!
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! ! ! ! !!
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! ! ! ! ! ! ! !
! ! ! !!
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!
FURN CE:
CONFINED SP CE
EUTT*,UTR*h\U*R]*
8[T]V]^*iZT]*!*
8[T]V]^*VX*cXTe* +\c]e*:V[T*2cYS*
GXb*V]YZTXH* 2VR_TSTU*GV]YZTXH*
OP!
O`!
GF!
ZO!
Z^!
Fa!
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ST-A1194-19
FIG C
53