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. CHAPTER 4 LIGHT, VENTILATION AND OCCUPANCY LIMITATIONS SECTION 401 SECTION 403 GENERAL VENTILATION ..lULl S('ul)('. Thl' prllvi'oillm pf this chapter shall govern the 4113.1 Habitable spaces. Every habitable space shall have at IlHlliJllun\ CllJJdili"ns ~lI1d 'oland;nds for lighl. venlilation and Iea,t one openable window. The total openable area of thc win- space rnr ,'cclIpying;1 Slllll"lllll' do\\' in every room shall be equal 10 at least 45 percent of the 401.2 Ih'sp"nsihility. The PIlnn III the 'otructure shall provide minimum glazed area required in Section ,W2.I, ~llld lll~lilltain light. \"l'nlilatipn and space conditions in compli- EXl"{'ption: Where moms and spaccs wilhout opening, to anll: with the,e lequirellle:nh_ r\ pn'oon shall not occupy as the: outdoors are ventilated through an adjoining room. the Ilwnt'l--OCnlpalll. or permit allllttwr person to IlCl'UPY, any pre- unobstructed opening to the adjoining morn shall he at least IPi,l"o Ihal .1011111 uJIllph- \l nh the: re:quirellll'n!Softhischapter. 8 percent of the floor area of the inlerior room or space. hut ~l" ._~ _\ Iternatin~ dl" irl'S. In Ill'U of the means for nalural not less than 25 square fcct (2.33 m.'). The ventilation open- : ,ill :illd vt'lltilatioll ht'r(~in plt'suibed. artificial light or ings to the ould(IOfS shall be based on a tOlall1oor area being JI,,_,,-I';llIical n:nlilati'"1 ll.llllplyilli_' \\-ith Ihe III/I',.,/(//io/llll ventilated. Hllilding (.O(/t- shall be pe:nnitted_ 4113.2 Bathrooms and toill't rooms. Every bathroom and toi- let room shall comply with the ventilation requirements for SECTION 402 habitable spaces as required by Section ,103.1. except that a window shall 1101 be required in such spaces equipped with a LIGHT mechanical ventilation systelll. Air exhausted by a mechanical 402.1 l1ahitahll' span's. E\"l'ry habit~lbk spalT shall haw at \-entilation systelll from a bathroom or toilet mom shall dis. ka'ot clIIe 1\-jll(low llf ;IJ-,pn,,-cd size bcin!" dirl'clly lu Ihe uut- charge 10 the outdoors and shall not be rel.ireu]ated. . d,ll_,rs or to a cl_'url. The minimum ((llal !"Iazl'd area for every 403.3 Cuoking facilities. Unless approved through the certifi- hahitahle space shall be ~ [ltTeent of the floor area nf such cate of on:upancy. conking shall not be permilled in any room- ("(10m_ Whne\'el wall, or lllhl'!" 1"-'rliOIlS of a slructure falT a illg unil or dormitory unit. and a conking facility or appliance Willlh,\\ (If any "H)m and such o!>,lIUl"Iions arc located less shall not he permilled to be presellt in the roornin,!l unil or dor- than :\ fed (01-1l1l1nl from thl' window alld extend 10 a Icvel ahovl~ Ihat of the lTiling_ or th" room. such window shall not be i11itory unit. lkel1ll~d tll face direl-tly tolhe oUld'H)rs Jlllr to a cnurl and shall EXl'eptions: not he included as contribllling lolhe required minimum total I. Where specifically approved in writing by the code wllldow area h>r I he rool1l_ o ffi cia I. Exception: \Vhele naturalli~'hl fllllollfns ur spaces without 2. Devices such as coffee pOls and minowave ovens I l'\ terior glazing arl'as is pn>lided IllI(llIgh an adjnining mon!. Ihe unobslnJl.t<,d ll,,<'nin!' 10 the adjoining rOl_lJn shall shall not be consHiered c()(lkll1g applIances. bl' at least ~ peru~1l1 nf the rlOOI art'a of the intnior mnm or 40],4 Prllcess nntilation. Where injurious. toxic. irritating or spact'. but not kss than 25 squ;trt' ket (2.:n rn~ l. The nte- noxious fumes. gases. dusts or misls are generated. a local rior gbzing arl'a shall he ha'ot~d olllhe tolal floor arl'a l.>cing ex hausl ventilation syslem shall be provided \0 remove Ihe con- served. taminating agent at the source. Air shall he exhausted 10 the 402.2 ('ommllll halls and stairwa~.s. Every Cllmlllon hall and exteritlr and not be recirculall'd to any spae:c. '_Iairway in rnidenti~d oceupancie,. other Ihan in one- and tWtl- 403.5 Cluthes dr~'cr exh~lUst. Clothes dryer exhaust systems r~lInily dwellings. _shall h,' lighlnl at all times with at least a bO- shall be: independent of all other systems and shall he exhausted wall standard incalllkscent lighl blllb for ,~ach 200 square feet in accordallce with the manufacturer's instructions. (I') m-') of floor arca (lr cqllivalent illumination. provided that the spacing between lights shall Illlt he ~reater than 30 feet (I) I.l-l mm). In other than n"ilkntial occupam.ies. means (If SECTION 404 egress, including exterior means oj e~rcss, stairways shall be OCCUPANCY LIMITATIONS illumillated al all times the building space served by the means 01 egress is occupied I\ilh a minimum "I' I f"olcandle ( II lux) 404.J P.-iV:Il:Y. Dwelling units. htltclunits. housekeeping units. at 110(lrs. landings and trc;lds_ rooming units and d(lrlllitory units shall be ammged to provide 402.3 Other span's. All "thn spaces shall be provided with privacy amI be separate from other adjoining spaces. . nalUral or artiliuallight sufficient 10 Pl'rmit the maintenance of 404.2 Minimum room widths. A hahitahle rool11. olher than a _sanitar~ Cl.lnditions. alld the safe occupancy of Ihe space and kitchen. shall nol he less than 7 feet (2]:1-1 nunl in any plan utilization of the appliances. equipmeut and fixtures. dimension_ Kitchens shall have a clear passageway of not less 2006 INTERNATIONAL PROPERTY MAINTENANCE CODE~9 13