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<br /> 2fl0� �A��1N�T`{��I �T�T� �N�R�`� �C��E �I�T�S 2��9 ���TIC.�IV I�115�� - ����.� �IC)tJ�� �I�I�II�`ILA,7'��Rl �] �
<br /> PRESCRfPTNE REQUlREMENTS(0,1)FOR GROUP R QCCUPANCY J � �
<br /> CLEMATE zONE 1 tv1150$.4 Intermittent Wt�ole Hc�use Ven6iation Using Exh�ust Fans. This section establishes minimum pre�criptive requir�ments for intennittent whofe house � ,� 1.1.J
<br /> ventikation syst�ms using exhausF fan,.�syvt�m�vhech meets alE the requirements of this sectian sha!!be deemed to satisfy the requirements for a whole house � �„ (,n
<br /> GI.AZfNG ��-�?fNG U-FACTOR WALL �NALL ventilatian,�si�rn.
<br /> WALL(12} SLAB(6)
<br /> AREA 10 Dt�OR{9} VAULTED INT(4) EXT(4)
<br /> OPTION Q/o OF Fl0(JR U-FACTQR ��ILfNG(2} CEILINC(3) �gOv� BELOW BELOW �LQOR(6) ON
<br /> VERTICAL OVERHEAD GRADE GRADE GRADE �RA�� iUl1�08.4.9 Whole Hpuse Venti(a#ian Fans. Exhaust fans providing whole house ventilation�haEi have a fEow rating at 4.25 inches water gauge�s specified in
<br /> - � Table M1503.2. Manufacturers'fan ffow ratings shali be determined according to HVI 916(Aprif 1995)or AMCA 210.
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<br /> j' // �' - / _ _ � i�/115��.�.r��;r t�iois�.Wha(e house fans [acate�4 feet or less from tk�e inierior�r;ll��>h�[1 have a sone rating af 1.Q or less measured at 0.1 iriches water gauge.
<br /> M�ra��(a:;turer's noise ratings sha(I be defermined as per HVI 915(October 9995). Rei���?�;!y mounted fans shall be acousticafly iso{ated fromthe structura!
<br /> � � a � elements af the building and from attached duct vvork using ins�lated fiexible duet or other a��rovPd materiaf.
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<br /> M1b08.4.3 F=�n��ntral.s.Ti��e whoie house ventilation fan��i�li t��contrafied by a 24-hour cic�ck timer with the capabifity af confinuQus operation, manual ancf �
<br /> // �� autama�?���a��tr�ai.Ths 24-hour tim r shall be readil accessible.The 2�-hou� tirn�r�ha►I be ca able of o eratin the whole house venti(atian fan without �
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<br /> / er.er�i�ing other energy-consuminc�appliances.At the fime of final inspection, fhe autorriat;c t:ontrol timer shalf be set to operate the whale house fan for at least �
<br /> 8 haurs a day.A labef shal!be affixed to ihe contro{that reads"Whole House Ventifation (see o�era#ing instructions)." �
<br /> UNLlMIT�Q �..,
<br /> GROUP R-3 �J
<br /> ��� AND R-4 0.35 p.�g 0.20 R-38 R-3Q R-21 R-21 R-10 R-30 R-10 M15Q8.4.�Exhaust Ducts.All��haEasr c�ucts shal[terminafe autside the buildin . �xhaust ducts shall be e ui ed with back-draft dam ars.AE�exhaust ducts in �
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<br /> �C p�yCk�� uncondiiion�c��paces shafl be insulated to a minimurn o#R-4. ,
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<br /> / � , M'I508.4.5 Outdoor Air Iniets. Outdoor air shall be disfributed to each habitabfe room by individual outdoor air intets. Where outdoor air supp[ies are separated U
<br /> /f � , _ � _ f firom exhaust points by daors, provisions shall be ma�e tc ens�re air ffo+ri by instailation ofi distribution ducts, undercutting daors, inst�Iiation of griEles,transams, t!j
<br /> - _ - or simiiar means, ��ocs shall F�e urtc�ereut to a minimum of 1!2 inch abave ihe s!sri�c��f the fiinisf�ffoor covering. �
<br /> � � �i / Individuaf r�om outdoar air inlets shall: �
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<br /> *REFERENCE CASE 1. Have control(able and secure openings;
<br /> 0. N�minal f�-values are for wood frame a�semblies anly or ass�mbli�s built in accordance with Section 60�.1, 2. Be sleeved or r�tr�eewise designed so as not to compr�mise the pherm�f pr��er�ies o#the wall ar window in which they are p[aced;
<br /> 1. Minimum req��irements fQr each option listed. For exampie, if a praposed design has a glazing ratio to the canditioned floor area of 13°!0, it 3. Provi�i�n�t fess tF�an 4 square inches crf net free area of opening for each habifabl�:;���€;�.Any in{et ar combination of ir�lets which provi�fs 1(1 cfm at 10
<br /> shal�camply wikh all of the requirements af the 15% glazing opkian (or higher�. Prapased designs which cannat meet the specific Pasc��,as dstermined by khe Hame Ventilating Instifufe Air Flaw Test Standard (HVI 901 Navernber 1896)are rJeemed equivalent ta 4 square inches net free o
<br /> requirements of a listed option above may calcu(ate compliance by Chapters 4 or� af this Code. area. � �
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<br /> 2. R��quirem�nt applies ta ail ceilings except single rafter ar joist vaulted ceilings complyirtg with note 3. `Adv` denotes AdV�nGed Ft'amed lnfets shall be screened o��tP�erwis�profected frvm �niry by Ie�ves or�ther materEaf. Outdoor air inlets sha{!be Iqcated so as not to take air from the "�
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<br /> Ceiling. following area�: � �.,,.,
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<br /> 3. R�aquiremen#applicable only ta single rafter or jois� v�ulted ceilin�s where bc�th (a) the distance betwe�n th� top of the ceiling and the 1. Clsa��r ti�ar� 14 feet from an appliance vent outfet,unless such vent outfet is 3 fe�ti�abo�✓�the outdoor air inlet. �.., �
<br /> undE:rside of the raof sheathing is less #han 12 inches and (b) fhere is a minimum �-inct� vented airspace above the insulation. C?thsr single �
<br /> rafter orjoist vaulted ceilings shall comply with the "ceiEing" requirements. This c�ption is limited to�QO square feet of ceiling area for any one z. �Nhere it wE►I pick up ohject�onab[e odors,fumes or f}ammabfe vapars. � �
<br /> ' dWe�ling unii. � �
<br /> 3. A hazardous or uns�nita�y[o�tion. � �
<br /> �. B+?I�w grade walls shall be insuiated eith�r an th� e��rior to a minim�tm lev�i of R-10, or on the interior to the same level as wails above � �
<br /> c�rade. �xterior insulatian installed on belcw grads walls sh�ll be a wa�er resist�nt material, manufactured for its intended use, and ins#alled �,A roon� or�pace having any fue!-burning app►ranees therein. � �
<br /> accc�rding �o the manufacturer's specifications. See S�ctian 6Q2.2. � �
<br /> 5. Closer th�n 1�feet fram a vent apening of a plumbing drainage system unEess the vent c�pening is at(east 3 feet above the air inlet. �
<br /> 5. Flaors over crawl spac�s or exposed to ambient air canditians. � (�
<br /> 6.Attic, cravv(spaces,ar gar�ges. �""
<br /> �. Required slab perimeter insulation shail be a water resistant material, manufactured for ifis intended use, ar�d ins�alled accordi��g to � �
<br /> mar��ufacturer's specifications. See Section 602.4. Q
<br /> M9548.5 lntermitten#Whole F�ouse Ventila#�on lntegrated With a Farced-Air System.This ssction esfabfishes minimum prescri�tive requirern�nts for int�rmiftent
<br /> 7. In't. C#enpteS Standard firaming 16 inches On cen#er wi#h headers insul�ted with a minimum of R-1 fl insulation. whole hous�ventilation systems integrated with forced-air ven#ifation systems.A system which me�ts al!the requirements of this s�:ction shall be deem�d to
<br /> satisfy the requirements for a whale house venfifation sys��m.
<br /> $. Tt�is wall insulatian requirement denotes R-19 wall cavity insulatian plus R-5 faam shea#hing.
<br /> 9. Dvors, including all fire cfoors, sh�l) be assigrted default U-f�ctors from T�bl� 10-6C. M9508.5.1 Intec�r�a$�i�Whole House Ventilation Systems. Integrated whole house ventilation systems shal!provide outcioor air at the rate calculated usir�g
<br /> Section M9 5Q8.3. integrated forced-air ventilation sys#ems shall cJistribute outdoar air to each habitab(e room thraugh the forced-air system duets. fntegrated
<br /> 10, UVhere a maxim�tm glazing area is listed, the #otal glazing area (cambined vertical �lus oVerhead) as a percent of gross conditioned floor Forced-air ventilation systems shall have an outdoor air in(et duct connecting a terminal e(ement on the outs'tde of the buiiding to the return air p{enum of fhe '
<br /> area shall be i�ss than or equal ta that value. C�verhead glazing with U-factor of U=0.4� or less is not included in glazing area limitations, forc�d-air system, at a point within R�feet upstream of YhP�ir h�nd{er.The outdoor air inlet duct�onneatian ka the return air stream shalk be located upstream of
<br /> 4he forced-air system bfawer anci shali nc�t be connecke�direcYfy into�furriace cabinet ta prevent thermaf shack to the heat exehanger.The system wiEl be
<br /> 11. C)verhearl glazing shal) have U-factors determined in aceorctance with NFRC 900 t�r�s speci#ied in iection 502.1.5. equippPd with a matorized damper connected to the autarnatic venfilation cantrol as specified in Section M1608.52. 1"he required tlow rate s�all be v�rif�ed hy
<br /> field testing with a fifovr hond or a fiaw measuring station.
<br /> 12. Log and solid timber walls with a minimum averag� thickness of 3.5'° are exempt from this insulation requirem�nt. '"�°'
<br /> M 9 508.5.2 Ventila#ion Controls. The whof�house ventiiation system shall be cor+tealled by a 24-hour clack tim�r with the capability of continuous operatian, �
<br /> manua{and automatic cont�ol. This can#roi will con�ra:tY��forc�d�ir system blower and the automatic damper.The 24-hour fimer shall be readiiy accessibfe.The n��
<br /> 24hour timer shall be capable of operating#he who(e 6�ause;��ritilatior�system without energizing other energy-consuming appliances.At the time of final v�
<br /> NOT�S �ER 2006 WSEC inspectian, the autorr��tic control timer sha!!be set to operat�ths whole hause system for at least 8 hours a day.A I�k�e{shal!be affixed to the conkro[that reads ' , ! T°°
<br /> °Whole House Ventifatian (see operating instructions}." L�•�a
<br /> 5(32.��.3 Seals and Weatherstripping: � �
<br /> a. Exteriar joints around windows and door fram�s, crpenings between wa{Is and foundation, between walls and roc�t and wa!(paneis; openings afi pen�;tra#ions o€
<br /> ufifity services through walls, f[oors and roofs; and alf other openings in the building enveiope for al!occupancies and aIl other openings in between units in R-1 ►U11508.5.3 Venti(ation Durt ins��lation,All supply ducts in the con�itioned sp�ce shalf be insulated to a minimum of R-4. �
<br /> and F�-2 occupancies shall be seafed, caulked, gasketed or weatherstripped fio lim�t air leakage.C7ther exterior jaints and seams shafl be simifar(y treated, or w �
<br /> kape�l,or covered with moisture vapor permeable hou5ewrap.
<br /> 502.�.6.1 Vapor Retarders:Vapor retarders shaEl be installed on the warm side(in winter)af insulation�s specified in the fallawing cases. M150�3.5.4 OutdaorAir 1nE�:�.�. �nl�fs shalf be screened or otherwise protec#ed from entry by leaves or other material.Outdooe air inlets shall be located so as nat � �
<br /> EXCI=PTI�N:Vapor retarder instailed with not more than 1/3 of th�nominal R-vaiue between it ar�d the conditioned space. to take air from the fioli��a��sr7g areds:
<br /> 502.�.6.2 Floors: Floors separating conditioned spaee from unconditianed space shal!have a vapor refarder installed.The vapor retarder shaf!have a one perm �
<br /> dry cup rating or less(i.e.four mil [0.004 inch thick]palyethylene or kraft�aced material). 1. C{oser than 10 feet from an applianc�vent aufi�t, unless such v�nt outlet is 3 feet above the oufcioor air infe#. �
<br /> 502.1.6.3 RootlCeilings: Roof/ceiiing assemb(ies where the ventilation space above the insu[ation is less than an average of 12 inches sh�fE be provided with a
<br /> vapor retarder. Faced batf insulation wh�re used as a vapor retarder shal!be face stapled.Single rafterjoist vaulted c�ifing cavities shall be of sufficient depth ta 2. Where id wili pick u�objectionable odors,fumes or flammah(e vapars.
<br /> al[ow a minimum one incia vented air space abave the insulat[on, �
<br /> 502.1.6.4: Vapor retarders shail na# be required in roaf/ceiling assembCies where the ventilation space�bove the insufat[on averages 12 inches ar greater. �• A hazaCdous or unsanitqry loeation.
<br /> 5p2.1.6.5: Vapor retarders shall not be required where a(1 of the insula4ion is installed between the roof inembrane and the structural roof deck.
<br /> 502.1.6.6 Wal{s: Walfs separating conditioned space from unconditioned spacs shafk have a vapor retardee instaifed. Faced batt insulatian shall be face stapfed. 4.A rQam or space havin��ny fuel-burning appliances therein.
<br /> 502.1.6.7 Ground Cover:A ground cover of six mil(Q.006 inch thick} bEack polyethylene or approved equa!shall be laid over#he ground wifhin crawl spaces.The .
<br /> ground cover shalf be overlapped 12 ir�ches minimum at fhe jaints and shall extend to the foundation wall. 5. Closer than 1 a ieet from a venE opening of a plumbing drainage system unfess the vent openiny is at(east 3 f�et above the air inlet.
<br /> �XGE�PTION:The ground cover may be amitted in crawl spaees ii ths erawl space has a c�ncrete slab flo�r with a minimum ti�ickness of 3-�/2 inches,
<br /> 5. Attic, crawl spaces, or gara�es.
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