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. CHAPTER 4 LIGHT, VENTILATION AND OCCUPANCY LIMITATIONS SECTION 401 SECTION 403 GENERAL VENTILATION ~OLI Scope. Ihl~ prlwision> llf fhi, chapter shall i!lwenl the "1J3..1 lIahitable spm:es. Every habitable space shall have at milliillum u.1I1diti"n~ and ~tandards fllr light, vclltilation and least olle openablC' window. The total openablc area of the win- 'p~IL'e fllr ocnlpyin~ a struL'lurc. dow in every mom shall be equal to at least ,t5 percent of the 40 1.2 J{esponsihilit~.. The llwner of the structure shall provide minimum glazed area required in Section 402_ J_ :111<1 IlIaintaillllghL \elltilation and spal'e cllnditions in compli- Exception: Where rooms and spaces witholll openings to ;i1lc'e with these r,'quirl'mcIIlS. i\ per'lln ,hall not occupy as the outdoors arc Vl'ntilated throui!h an adjnining room, the (l\\ IIcr-occupanL or permit anolher pcr",m tll occupy. allY pre- unobstructe:d opening to the adjllillillg room shall be at least luise, that do Ill.>t Clllllply \\'ilh thc requir,'m,'nlS of this chapter. ~ percent of the floor area of the interior roOIll or space, but 41J1.J Alternatiw devin's. 111 licu of the n1t'allS for Ilalural not kss than 25 ~quare feet (2.33 11I'1. The ventilation open- light and ventilalilln hl'rt'in presnilwd. artifil'ial light ()r ings ll> the ollldoors shall bc based on a tL>tal nOllr area being 1l1<,dlanic;J! \l'ntilation cOlllplyini! with fhe 11I1I'r!lilli(l1l1l1 ventilated. Iillil,Iil/g Co,lc shall be perlllilll'lL "03.2 Bathroollls and toilet rooms. E wry bathruom and tui- let room shall comply with the ventilatioll requirements for SECTION 402 habitable spaces as required by SeL'lilln .IlB_I, except that a window shall not hc required in such spaces equipped with a LIGHT Inec'hanical ventilation syslem_ Air exhausted by a mechanical 4112.1 Hahitahlc spans. Eyery habitable space ,hall haw at ycntilatiun ,system from a bathroolll or toilet room shall dis- . ka'l (>lIe windll\\' pf apprm'ed "ize facing directly 10 the out- dlarge to the outdoors and shall not be recirculated. d'H)r, or tt) a L'llurl. The millimum fotal glazcd area for eyery 40J.3 Cooking fadlitit's. Unless approved through the ecrtifi- habitabk space sh~i!1 hL' ~ percellt of thc nO()r area uf such <'ale of occupancy. cooking shall not be permitted in any room- rUl>nl. \VhcTe\'l'r \\ ails or other portions nf a structure fal'e a ing unit or durmitnry unit. and a cooking facility or appliance windo\\' pI' ;lny rtlUIII and such (lhstructiuns art' lucalL:d less ~hallllPt be permitted to be present in the rouming unit or dor- Ihan -' re,~t I () 14 111111) frllm IhL' window and e.xlend to a leyel abu\'L~ that or the ceiling of tIll' wpm. ,uch window ~hall not be lIIiillry unit. (It-emcd tll face dirl'ctly tuthe (>utdoors nor to a cuurt allll shall Ext'cptions: Iwt be illduded as u1ntributing to the required minimuIII total I. Whcre specifically approved in writing by the code window arC;l for the rt:'um. official. Exn'ption: Whcre natural light for n.lOlm ur spaces without 2_ Devices such as coffee pufS and microwave ovens I extninr glal.ing ~u eas is pwyided thruugh ;In adjoining shall uot be considered L'i){)king appliances_ r(lom. {I'll' unoh,tructed npt'ning tu the adj(linini! roum shall be at lea>! ~ percent I If the fkH Ir area (If the illlerior room (lr ..1I3..J Process vcntilation. Wherc injurinus. toxic. irritating or spa('<'. but not less than 25 "quare feet 12_3.\ m')_ Thc cxte- nuxious fumes. gase,. dusts llr mish are generated. a Incal riur gtlling area ,haJJ be based un the total nlHlr area being e.xhaust yentilation system shaJJ he provided tu remove the con- sen'ed. taminating agent at the source. Air shall be exhausted to the 402.2 ClIllInwlI halls and stairways. Every L'ommun hall and c.xteriur and not be recirculated tll any space:_ ,tain\'av' in re~idential pL"(:upanl'ies_ othtT fhan in ont'- alllltwo- "1I3.S Clothes dryer cxhaust. Clothe, dryn exhaust systems family dw<'llings. ,hall he lighted af all times \\ith at lea" a (ill- shall he indqK'rHknl of all LIther syslL:ms and shall be exhausted walt 'tandaId inc'andescL'nt lii!ht bulb f(Ir each 20ll square kl't in accordanee with the llIanufacturer.s instructions_ (I t) m') uf fit lor arca or eLjuivalellt illumination_ prm'ided that thc spac'ing het\wen lights ~hall not be grealer than 30 feet ('-)14,.1 llIIlI)_ In uther than re,idential uccupancies. means Ill' SECTION 404 l~gre~,. indudillg exteriur means of egress. ,tairways shall hL: OCCUPANCY LIMITATIONS illuminatL:d ~It all timcs Ihe building space served by the mcans ..II..J Prinlc.\'. Dwelling units. hoteluuits. h(lusekeeping units. of egre'~ is ()cnlpicd with a millimum of I footcandk (11 hlX) at r".l<lrS. landings and treads_ rooming units and dorrni\(lry units shall be arranged to provide "02.J Otht-r spaces. :\ II other spacl's shall be provided with privacy and be separate from other adjoining spacL:s, . natural pranifiL'iallight ,uITicielltt(\ permit the maintenance of "0".2 Minimum rllllm widths. A hahitable room. other than a ,anilary condition,. and the ~ak oCL'UIXlllCY of the space and kitchen. shall not be less than 7 fed (2134 Illm) in any plan utilization or the al'pliaIKes. equipment ami fixturcs_ dimension. Kitchens shall have a clear pa",ageway or lIot Jess 2006 INTERNATIONAL PROPERTY MAINTENANCE CODE@ 13