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2. A demper installcd and sel to mcet measurcd ilow <br />retes as spccificd in Table 3-2, by ci�hcr field <br />testing w (ollowing manufadum's installeUon <br />inslructions brsal on site condilions; or <br />3. An aulomatic ilow regulated device with field <br />me�urcd or field celcula�ed minimum negetive <br />prasure of 0.07 inches waltt gauge at �he (aint <br />where the outside air dud is �ronnccted to the <br />retum eir plenum. <br />c. Heat recovery ventilWion systems: Ail ducl work in <br />heal recovery ventilation rys:ems shall be not less than six <br />�6) inch diemMer. Ualencing dampers shall bc installal on <br />Ihe inlet end exhaust side. Plow measuremcnt gtids shall <br />be instailed on the supply end rtum. Systrn� minimum <br />Oow rating shall be not Icss lhan lhat specified in Table 3- <br />2. Mezimum flow rates in Table 3-2 do not apply t� heat <br />recovery vrntilation systems. <br />JOJ.2 Source Speciflc �nd Whole Itouse Ventllatlon <br />DuMa: 8xheust ducts shall mcet ell rcquiremen�s o( <br />Section 302.5. Ducl diemMer, lenglh, end number of <br />elbows for ezhaust fans shall be ac specified in Teble 3-3. <br />7'rnninal elements for ezhaust fen duct rys�ems shall heve <br />at Ites� lhe equivalent nM frce erca of i. e ducl w'ork. Duct <br />diameter, Iength, end number of elbows for integratcd <br />forced flir sysiems shall be ac specified in Tnble 3-5. <br />Terminel elements for integratod systems shall be the semo <br />siu ati the connecting ductwork or oight (B) inches in <br />diametcr, whichever is grceler. <br />SECTION 304 — MECHANICAL VENT!'.�TION <br />CRITERIA AND MINIMUM VENTi�ATION <br />PERFORMANCE FOR ALL'vTHER OCCUPANCIc i <br />NOT COVERED IN SECTANS 302 AND 303. <br />304.1 VrnNldion: fhe minimum requirements for <br />operablc arca to providc nat�vel venlilation ere speciticJ in <br />tFe Uniform Duilding Code (UIiC) as edopted by Ihe st:�tc <br />o( Wachinglon. <br />Where a mahanical ventiletion system is installed, �hc <br />mechunical ventilalion system shell lx capable of <br />supplying vcnliletion air lo eech xonc with Ihc minimum <br />ouldoor eir quantitics specified in 7'able 3-4. <br />F:XCk:PI'ION: 0.'Iwn iktvpnncy dcn.iq� is known <br />wnl d�Kumentcd in �he ple.ns, �h: uwsiJe uir rme mny tk <br />ba+eJ on ihc dcsign na.vpant dcnsiiy. l InJcr nu <br />ci�cumsiance sholl qk Mtiurymcies uuJ result in �i�ciJu <br />nir Icss Ihan ano-hulhhut mwlling from applica�iun uf <br />1 nhic 3-4 cslimul�d mus�.:mrn iknipimc� � nluc.. <br />Efledrve 7I01/98 <br />Waehirqton State Ventilation <br />And Indoor Alr Duality Code <br />The outdcar air shell be ducted in a fully enclosed peth <br />directly to every air hanJling unit in each zone no� <br />proviAed with suflicirnt u�enble erea for naturel <br />ventilazion. <br />F.XCF.P7'10`1: DuU+ may tamimte wilhin 12 incbes <br />of �he inlalcc �o an I IVAC unit providtd Ihey ms <br />phyaic�lly fav�rned eo �hel the ouLside air duq is diiecled <br />iNo ihe unil L^Wce. <br />In ell perking garegn, other Ihan oprn parking gereges <br />ac defined in UBC Section 311.9, used for sloring or <br />hendling o(eutomobiles opereting undn their own power <br />end on ail loeding plazforms in bus tmninals, venlilWion <br />shnll be provided m I.5 c(m per squarc foot of gross Ocwr <br />area 7he building oRcial may approve en eltemate <br />vrntilation system daigned to eahaust a minimum 14,000 <br />cfm for each opereting vehicle. Such system shall be based <br />on Ihe anticipated insununeous movemrnt rate of vehicla <br />but nd Icss �hen 2.5 prrcrnt (or one vehicle) of the gerage <br />cepaciry. Automalic cafion monoxide sensing systems <br />may bc submi�ted for epproval. <br />In ell buildings used for the rcpair of eutomobila, each <br />rcpeir stall shall be equipped with an ezhaust extension <br />duct, extending to the outside of the building, which if ova <br />10 feet in frngth, shail mechanically exheust 300 cfm. <br />Connecting offica end waiting rooms shall be supplied <br />wi�h conditioned eir undtt positive pressurc. <br />Combustion air requircmenls shall conform to the <br />rer{uiremrnis of Chapter 7 of ihe UMC. <br />Mechenical refrigtteting eyuipment end rooms storing <br />reGigereies shall conform to the requirements of Cheptcr <br />� I ohhc UMC. <br />