HomeMy WebLinkAboutB3-1198 ENG LTR 6-2-04.PDFJUN-0 - 4 12:40 CATAWBA COUNTY 1 628 465 6962P" 02/
S &GIKEERS� PL
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MOAC.MTON, NC 28655 E
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, Phil Sunlifin
roli Cori ructi rr Coeiptany i
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idic ,cry, N'12
Subt To, Prp sties
"i k ry,�,NC
bear Mr. Bu, on:
I r `lr a 4 that the building clossif(cation has changed t b u
project so it� rr 2 type and accordingt Table 4013 f t North' r oh
no
Mechanical.d�de,Ecktiorv, requires-0,05- cfmisquare foot of outdoor'
ventilation j l tires the building is occupied. Accordingt the Arch tectur l
plans, the ' r � i 3 : Squarefeet, $0 the
b 53_ a' .5 2.5r. t i Csstil that this tars Curs h budding
is occupied rr outdoor air louver rest be installed that easily allows 4 6.54 cf
ion cannot
building
zat
n inn rl ckith f i t_ area tights so tt t when the _ to �s
to
�`lightsare � i �r� �Afi
for p urrs t cupy the building, the ventilation br, automaticallyst s To
provide'ti ti rrlI you "ill also need to install a motorized louver for on sid . air
intake, ct t o l t� r must
b i with an switch s h fan will start
until the lou,6 r" i 1y open and na- buildirqti s can
occur. ` otrid louver must have enough "free area" so the outside ir° can
sue easily i 'side air can rove easily insidie € nd not draw in moisture fry rain into
the space, R t_exceed 1/ " external static pressure or a vel c t
through the aver •f more thorn 500 feet/minute, I understand that you ave
selected a Copk t det I2 rr c s is rate at 427
cfM flow at tkI `> is pressure so this is a good selection. Yore ill rre
$p
1 628 465 8962 P.03,,'03
JLIN-02-2004 12:41 CRTRWBA COUNTY
4 lr instaW on the opposite wall, and the t "' e area
po"red outsidc Q� intake- ouve
must be 42f n%l F feet/minute = 0154 sq. Feet X 144 Sq Inches/Sq. ,.got
I sug, ZOO/. Sa"facter-SOFIVeMat Inet
5gest we include a
123 5quare
dreal of 150 acre I Inches to makesure "a building negative pressure can ccur, I
u ha+ vrselected 0 Model XAD-4-45 NCA extruded aluminum ouver
de
this is a- 9cmd, cho ice., 1"he size
with- a- has a 51% free- area,
14 area of 2451
selected isaO 18' x 180 which is 324 5quorelaches GF, his free
16524 Squ3re say arThes.
To e e SPD M d
mj'these calculiat ions, you will install 0 Cook typ
12SP15D wall an 0 one wall of the work area that is powered at any tit"Chil
the area = . On!, to 016W Personnel, to occupy the space. You WW i
180 x Is" NCA Modol XAD-4-45 extruded louver or the opposite well thut
entilation fan is powered and has an and switch SQ the
powered whed the v a no building negative pressure c
0, � ouver is fully OPCA 9
not start unt'soh l
you loo indicated a large Dayton Exhaust Fan has been in$ all 1
the idea that ithe owner- can-operra duaron4 start this- fwv wheri-C h; h
requiring gen#ral vintilation exist inside the building, it appears that t i ,'4
cause buildino negative pressure since the amount of opening for apt oar
I s heaters so the h
is variable, 414y6u�must- irderlock this fan with the 90
tot qp AC9te ,hen%this for, is tun
rnpill "o".
Ibeliveyo equipment-sL-�ctioml-am�90*dftar4byperformtmgtl1i
�7' e installation
interlock ire note �q I d 1hir- should be a comfortable and sofa
ou have any esme.
complies withithe �-C, Ouildirg Code. If y qutions call
Sincerely,
Wotts-emfineers. PLLC
R" CA,90"--.0
1!81V�5 z
t P48;08
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Max D. Watts, PIE
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