-
7/25/2019 Attic - Foundation Ventilation Work
Sheet-2011!12!19
1/4
Attic & Foundation Ventilation Verifcation Calculator
Total Attic Floor Area = sq. ft.
Total Attic Ventilation = 0.00 sq. in.
Total Upper Ventilation = 0.00 sq. in.
Total Lower Ventilation = 0.00 sq. in.
Total Underoor area = sq. ft.
Total Underoor Ventilation = 0.00 sq. in.
Vent Type
Attic Ventilation:
Height x Width sq. in.!
"idge Vent lineal feet x #$ x #.%
Height x Width sq. in.!
Height x Width sq. in.!
"idge Vent lineal feet x #$ x #.%
Height x Width sq. in.!
&o't Length x Width ft. x in.!
Height x Width in.!
Height x Width in.!
Height x Width in.!
Vent SizeCalculation Method
Vent Length(ln. t.
!"i#ting$pperAt
tic
Vent#(pper%0)of
atticarea!
&creened *ent pipe+t(r,in or roof -ac
/.# x dia1eter sq(aredinches! 2
3or1er Vent+lo(*ered 4 screened
5a,le Vent 6 rectang(larlo(*ered 4 screened
5a,le Vent 6 triang(larlo(*ered 4 screened
Height 4 Width 2 $sq. in.!
%e&$
pperAttic
Vent#(pper%0)o
f
atticarea!
&creened *ent pipe+t(r,in or roof -ac /.# x dia1eter
sq(ared2dia. in inches!
3or1er Vent+lo(*ered 4 screened
5a,le Vent 6 rectang(larlo(*ered 4 screened
5a,le Vent 6 triang(larlo(*ered 4 screened
Height 4 Width 2 $sq. in.!
ingLo&erAttic
#lower%0)o
f
rea!
&creens+ no lo(*ers#2#78 1esh
&creens+ no lo(*ers#298 1esh
&creens+ w2 lo(*ers#2#78 1esh
-
7/25/2019 Attic - Foundation Ventilation Work
Sheet-2011!12!19
2/4
Height x Width in.!
&o't Length x Width ft. x in.!
Height x Width in.!
Height x Width in.!
Height x Width in.!
Height x Width in.!
Foundation Ventilation:
Height x Width in.!
Height x Width in.!
Height x Width in.!
Height x Width in.!
Height x Width in.!
Height x Width in.!
Height x Width in.!
Height x Width in.!
%ote#: prod(cts in attic areas. Ventilation ser*es to 1ini1i:e
heat ,(ild (p in
!"i#t
Vent
attic &creens+ w2 lo(*ers
#298 1esh
%e&L
o&erAttic
Vent#lower%0)
of
atticarea!
&creens+ no lo(*ers
#2#78 1esh
&creens+ no lo(*ers#298 1esh
&creens+ w2 lo(*ers#2#78 1esh
&creens+ w2 lo(*ers#298 1esh
!"i#ting
FoundationVent#
;otto1o
fFlood
Ventwithin#$8of
grade!
&creens+ no lo(*ers#298 1esh
&creens+ no lo(*ers#28 1esh
&creens+ w2 lo(*ers#298 1esh
&creens+ w2 lo(*ers#28 1esh
%e&F
oundation
Vent#;otto1o
f
FloodVentwithin#$8
ofgrade!
&creens+ no lo(*ers#298 1esh
&creens+ no lo(*ers#28 1esh
&creens+ w2 lo(*ers#298 1esh
&creens+ w2 lo(*ers#28 1esh
'' wood Association do
'''Use #2# for Fo(ndation Vents in Flood ?ones 6 eq(i*alent to #
sq. in.
-
7/25/2019 Attic - Foundation Ventilation Work
Sheet-2011!12!19
3/4
"es(lts ) of req. calc(lated.
5ood
5ood Attic
5ood Ventilation ratio@ #2 /00
"es(lts ) of req. Fo(ndation
5ood Ventilation ratio@ #2 #%0
0.70 0.00
0. 0.00
n2a #9 0.00
0. 0.00
0. 0.00
Su)total *.**
0.70 0.00
0. 0.00
n2a #9 0.00
0. 0.00
0. 0.00
Su)total *.**
0./0 0.00
0.%0 0.00
0.90 0.00
0.// 0.00
+elloBelds are (ser pro*ided
infor1ation. ,reenBelds are
Vent -eight(in.
Vent idthor dia. (in.
%u/ero Vent#
%et Free AreaFactor (%FA''
Total e0ecti1e1ent area (#2.in.
-
7/25/2019 Attic - Foundation Ventilation Work
Sheet-2011!12!19
4/4
0. 0.00
Su)total *.**
0./0 0.00
0.%0 0.00
0.90 0.00
0.// 0.00
0. 0.00
/00 #%0 Su)total *.**
0.90 0.00
0.C0 0.00
0. 0.00
0.D% 0.00
Su)total *.**
0.90 0.00
0.C0 0.00
0. 0.00
0.D% 0.00
#%0 # /00 Su)total *.**
hot seasons and red(ce condensation in cold seasons.
re* $0##6#$6#C
(1ents as s(ggested protection for roof sheething and wood
ent 2 # sq. ft.
