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<br /> . . • �'��T��TQ�$���$,.�„01����}��(kj,$����;�1(���'�J��$��� ' � --..• M1507.3,4 Whole-house ventilation using exhaust fans. �y �_ �
<br /> �IAf���14�►1��PRl41�L TO�:OM�A�ING�9C�'HIE'6lYQF�F�„ ..�p��s���p�;'���y��,�����,�,A��� ��L�� • � � ' . . • � This section establishes minunum prescriptive requu�ements • , �: ' ' .
<br /> , , ��� ���L�,�� for whole-house ventilation systems using exhaust fans. A , 5���`.
<br /> �'����9�r.�1'F'1 T�����,j„��i�{�����• �, j���.��Q,�d�.�.� �������������7„������������� • --"""�-----�--- , system which meets all the requireinents of this section shall o �
<br /> be deemed to satisfy the requuements for a whole-house �' � /
<br /> ;
<br /> ���1�1'���1ATl�NO�L��8�@N'�'IAL.C�9D� � . (�g�TH�+���1�t�'b'�OtlRt'P��t�'�i�;t3A�tA�3ES ANp � �` Ak.[d W.U��l�,�L�C't`RtGAL A�1D Hil�P���'��'I�Ai!1� ventilation system. � '���r�'
<br /> 20{��IW't�l�TlQ�1.,�L�GQF�� � � x H�►�I�t3�1 pR01'I�C�'IC3W. � � ,1N�LL�Al�it�G�1l�.l�IQS AR1Y.C,ltlL[CEt9 AI�D�E.I�LE�. ,
<br /> . . .. . ..
<br /> .2a 42 lA��i...:.. . E3T�S'�`l�i��1 �ObE _� �� _. : , . .
<br /> C�J�D��$�1��1LL FL�Id� A t'�
<br /> ,_ 3T � YI�B&�l+t����rp�;q��,�,��������,�R 2 M1507.3.4.1 Whole-house ventilation fans. E�aust fans ' ' ,���
<br /> " � � t�EStS�AAI�t'T�i�i�T�YO"��J�fiE bIRAl�1. � {�'F�
<br /> , _..... . ......,..:.,..:., .:. , �
<br /> � • ��; ����„ � � providing whole-house ventilation shall have a flow rating at . ' ' . �y��:��
<br /> 3. s�����l�A��1.b�4V E.!l�t1T�i�`f�2.�t��A. �' �•�lto�I.�U'f'1.�1'A��(�(°���'��#+�t;���� , 0.25 inches water gauge as specified in Table M1507.3.3(1). �'�S
<br /> �����.���.�:A�L,:�t:��r�,������; $: A�'��"����•�����"l�ll�4 74"���� �'R���;j„��'�'� �7� ��� Manufacturers'fan flow ratings shall be deterniined according '�� ' -
<br /> 15#F�L'!'Ll�lt���'�/�Q,L.IL���L�1�ki��. � .�`+1•�� � i�'�1����1,,.$11'!�� to HVI 916 or AMCA 210. � . $•.
<br /> '�. � �/��yd��ppy�� l.L.�9 �ggg1 �1�a��+�#�UF.��1 t�A�! + , �o
<br /> � ' . . - .,. . .....' ... �i/Y!�#A'�ti[i# II���BS i a . . . 1 , _ u .
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<br /> ;.. . �R6t/1D�/a TU�'A�;��...� I•3f �,�.���`f���{L��Ati�i/ __�_........_. Ls'S� : .L��"'�"���' '. ., 9 .--_..._...,_....,. . , or grille shall have a s nel ating of le0tor �'�,
<br /> � .��r. ... ..._�.. .. .. . �
<br /> ,
<br /> ��t��/it�E A'1` �-� . , _ ... .
<br /> '��_��.ti/l�".' ��
<br /> �`g, � ��a>• -•- less mreas ed t 0 1 inches water gauge. Manufacturer's noise
<br /> OTAl.t���;_�.5.�.k��'�Gf�'�IL��ACE V�NT ,�. � ,
<br /> ` ��'��`����������--��-��• .����' ratings shal]be determined as per HVI 915(March 2009).
<br /> �t�01A►I�C3l#b: �� t»�fs/s.�. , �. �
<br /> PRC}O/ID�A�"f0`T`��.t����r��;. ���.�.��y����������,�, � . � ' Remotely mounted fans shall be acousticall isolated from the �'�` �
<br /> � . �� V�lN�`�L�T"1 - � y �.�
<br /> • ���D� :ti���, �PH ' '' �-�"'"""°� � ' structural elements of the building and from attached duct �«�
<br /> _ �ovt����r��rA����:��.�.���r��°�i��s�a��v�+�rf������:v
<br /> EX�O�UI�E � ��O�E����O?AL O.K" : ... , . � ' wark using insulated flexible duct or other appro-ved material. � � ,
<br /> � S.�e IN��'�.`Y'�'t�"SPACIE VERt�'i1,.��'t6��1�� �� � 1.���RG��l���t��C e4�6 WWOl;�H�El��'i���T11�A►1°i�Ai SI��TE�� , ..��
<br /> - : . �ROill17L�A�'6'Ttit.OP ' ` �
<br /> �1 AR�t�lE{�UI}��D.
<br /> ,.::.., S.�.�t�'F A7�'I�Spt1C��EaT13��°IO�i*.. �
<br /> M1507.3.4.3 Fan controls. The whole-house vrintilation fan y,
<br /> f.;AR`CHt�tlAKE-. �8� ��R�2 GAB1=�,�Fbt)CO��tA�X�`Q�2¢tlpp3�91�NTS�1/x-�Ii�D.��;��Kg C3� •� . ? SOUt�:����Cl�lG����g��"y��'�j�Ti�y q� shall meet the requirements of Section M15073.2 and c�
<br /> _� . SCbFFFT il,�q�TS�o.
<br /> � . . ��� . �� l�1�ACN$C�"�G�1,�Ti� M15073.2.1. ��
<br /> �q� . . . . . . , . '
<br /> ��+����4�'(' ' �A����`��'�����t���'x� M1507.3.4.4 Outdoor air inlets. Outdoor air shall be
<br /> � T'�`I°'� ��.E�Gi1( ��. I� ����� . �u��atar�..,sa�w��sa��r�����e� �;��
<br /> ��•�{q���A�������������p.� distributed to each habitable space by individual outdoor air ��ffi
<br /> �����L ���������' ���� inlets. Where outdoor air supplies are separated from exhaust �
<br /> . ' Cs�----.,.....'.v" B ���t���'�1�'��A1�� y P °� '
<br /> ` � � points b doors, rovisions shall be made to ensuz�e air flow by
<br /> ���E�� �'�����'�f• 9�.�'A'�- '' � installation of distribution ducts,undercutting doors, �a��� �
<br /> �R ����L���C �������$�A��" �� �L�������U��`�������'�'��ar ' �`������-���g "'.�-� .�` . ... . �$`.�.7v3.3t1��� installation of grilles,transoms,or sunilar means. Doors shall �� ��
<br /> �� ��������'���x' � �����'"��'���+�AF�ti B(�1�1�Lq A81C9�$g 8lh�iRt>��� , ' . be undercut to a minimum of 1/2 inch above the surface of the � .� �
<br /> �. � S'�'��AP�D 1�'C�I �X��11��'d't�1�1°�X'���OR". 2. AL�4����`��41`Cll�{S�'i�3'i'�iV!�A9`�'���l�i�A�l.B� � finish floar covering. � .
<br /> �NF��lI��$�ALI„�d.37`M�►�4s.. � � e,�
<br /> �• �€��0�lN��RCt�. �'��#�,� � r �
<br /> �0 1�tA'FEEt�A'T�i�.�'�'����'fia4�f14��b�C��TIi4iG
<br /> �� '� ly!J��3��. R-C,. Individual room outdoor air inlets shall:
<br /> �1A`T'i��4PpL�At����N���Y GC3Al���1/�e�°IOAI A�T.A�a�1�A� � ����P�t64�V��it.A'�[t}�1�Y�°� �ii�i�L�E . �
<br /> ! ����
<br /> ���� ; S'F A A l C 9 A���,0�1���i�f$UL/�1'��il T4�i-��O k��1 b i F C��t�'�L,��1�Y AL,�/t`tC��, 6�E�}l l��t�'�?°S, . : .
<br /> 1 H a v e c o n t r o l l a b l e an d s e cure openirigs;
<br /> " �-�CA�'��}���������������o • '�'y '�a������� � ��0 2. Be sleeved or otherwise designed so as not to ' ����
<br /> 7• �.t i���R$MA�.L B�PI�R 1�P/X STA��i�A�tDS. � t��
<br /> �• tAtSUI.��"�.�p�qN�������.g.����y���,��p��� �, . �ij1 +��s������������,���,g���,����� compromise the tliermal properties of the wall or ,����
<br /> 2� LIGFIT��AM1N�$Idll�iD�"1'U8S 1't��l'll�{38�QE'i�. `
<br /> t1�1H�A'T.�A AR�A$, � � .Sl�I�LL�Gb�I`����.L.�D�Y�2�b��9,D���.pC6��e���� . _ .
<br /> wuidow_m which.they are placed, �
<br /> • JOI�'1'�c��I��� 1�iF�2 pR Q�1"1'�� : 4. �E10/M�R 1��($Ey(�q�^����LIIiHI'1'F'IOT iNA+"1'�R,lpl�C}y������ �'���P�►C+t'���G''��1'f'��J(1�$•����,'1°$�#+dr -3. Provide not less than 4 square inches of net free area o£
<br /> 4. 4.X,4�tl�L.A►!'�3ER 0��#2��t BE°�'TEE� " Z.5���A. " �
<br /> � bdA@�1111�L ANC��I�JT��'p'f(a(�,����, ' openiiig for each lia6itable space. Any iiilet-o�'- - - ��s
<br /> � . 5. �c'aLU=La4M.�EAA!!S: �. �
<br /> -S T a#�9 A�t B�".ro R A�E(i.e<3 1 1�"j 2 4 F-1 I 4 �.�� . �' WaC,D��"f,��1/�$a 4 1►l p�l d��p L.A���k 1 A i F�!'�C 3 H T(�I T�'l l�i G W k t�l,�W t"i U���A�a l�1 A L t�l�i�4�l�A��l��1"i w t t°a�� ~ c o m b i n a t i o n o f i n l e t s w h i c h p r o v i d e.1 0 c fi n a f 1 0 �,��� .
<br /> -fNDUSTRFAL G�A��ti.�.3 /�'1 . 24�-V4-i N t? �.�� ' 1,0�:�;dR L�S�11��UR�AC�N1�U�1'�t�L,��1"FlA4�4'����tl ± -
<br /> + +� ���:O�JT$�����Ryg{�-pl���d���C�•�Q T�F�R��� Pascals are deemed e quivalent to 4 s quare mches net .��.� �
<br /> 6. �V l� � W 1'C H A C C��S l�L��AMA���to t�llt�.�5Q.1Ai,��t��V�Af'�' C�l L l�. , _ .
<br /> 1.�� � 6< ,Al.!»�l�'1'��i�9�A��.l'� •. a ea :.._:_ _.. . .
<br /> free z• �� �
<br /> T° �t���A�'� ���°�1������,����u����A1���R�QU�� ��"���°�ii�°�.FtE�li�����'a I�ilets shall be screened or otherrvise protected fi•om entry by ,��
<br /> g, ��x�� . �'1� s• ALI.GA��►ND OI�:������8���p��,����NA�E� � T��'��'�'��`���M��A�E��I!Gi14�� '� leaves or other material. Outdoor air inlets shall be located so � ��
<br /> � �.�� ' ��G�����•��R���n������'��, g� ��!�� ��1'��°� ����BP�t� as not to take air fi•om the followin�areas: u',����
<br /> �3 '��� �, �� � , 7� �t�C�p LI�t�T A�E�.�,�,7��, �UBLE 1�!#!:L��3� ��� ��.A�.L ��G`�Ifl� � ,�$
<br /> p 1. Closer than 10 feet from an appliance ven�outlet,
<br /> � �'F�0��1�'l�d S�AL���°s1�8�%l�1, ��.� . 6�.��B 7'E�'T�A �c�
<br /> � � unless such vent outlet is 3 feet�bove the outdoor air ,�� .
<br /> ����IC S�L.tO�t�E E6Lt9��ll+� 1D F't'�.C:. . " �' �#�.�l.AG�C 4�1.�1��},���t 1��iAtle$P,4G�. ' ' inlet '
<br /> 9. ���1'�tl���1l�i���Ft��.°�N����tll �' � �1�fL � �
<br /> ' "' ���,�e O�.RT'.�1�t�l.LS,i3�Al�,��HL,S�{�t;�#�►�i��1111��i�, ' '�" 7'p�� �,� �����*�'�� �� 2. Where it will pick up objectionaUle odors,fumes or
<br /> ' . 9�6�I�HT' ; • E���t M��1tT'Cl�,IE�7'�sL�TtQ�t�}S'�'�U�'tt • � ����°���t�Y�R�� �
<br /> . _. �d t��i�lM�1`�'f�l����� ��R�CtYI EI��'�" , � "�°�.���� , flanv��able vapors. � ;�
<br /> . �.
<br /> � '1'PiE Bl1;�,p��q°��` 8�����,t,t��� ��'����' 3. A hazardous or imsanitary location. �
<br /> � . �T�UI�E��f�f�+l,l.o��fl�lt3�tE�f.�Y i.tCCALS61y 1�ifA$Hl�'f�� ' - __
<br /> I �.�1��lf�����fit�t�l�L�C��I�►�:l.���� s
<br /> � S"�'��I'1�E��R. �� i'G$�� . . ..
<br /> . . �I� 4 oi p ce l�av g f 1 b
<br /> .--
<br /> C�'! Ll.���.�A�tt9 S�U�tt���'��11C��,�B�E�IC���
<br /> � � ' � �- �9►1��.�Efz;C"1 F4�d� •.. � . ��»��.�•�'ta°S"�.`c�:�T�,l��...::--� �t+�Ml��T���"�����t,. Y ue- urn g PP ia��ces
<br /> . ' St�EO��I�A4l.1���t�fl 4.A'CEt�AG�RA►�:tt+�t3�i�IALL��!W .... ..�"".�....���°�����9�.,... .,d�.�l��� .
<br /> � �b AS N�i1`T'O C�,
<br /> � ���IE$���"f!i�WeQ�„L����fl�f�ll�af 4Ad �l+1'i"I�i�� . 5� Closer thans 10 feet from vent o eninlllof a lumbinQ
<br /> ����9���T��� ......... ..
<br /> , r4CG4RDA��'{RIiTH i:1�,C Zb�6� -. , . ,
<br /> i�`
<br /> 4 � A���+C�1�t�+ND�ROVlp�Qyt'�7"!� '�"&��N :�, drau�age system miless flie vent Penu g is a least 3 � %
<br /> �s,: �
<br /> . � • ' IlVCi�3����P��'T�i+t���P�NiNU��I�.F��1�48l.������, feet above the air u�let. :
<br /> ' � �� . ����t����"�.A!'������C)A+fit��A►C��°tAPL�tJ A��' �' �W�J�.� MO(,a5�. ��� `I"(? .� k�C9G>�,�'��? it� 6. Attic,crawl spaces,or garages. . i ; .
<br /> � � ��ii�tAiC��I�MB.�'t�a LA1�F�\l. ��� `�t°��� t�t I 5D7.3���L.�1o/� '_. y °�
<br /> � . �� ���.�x.v��t��vu�,����v��ri������'L����r�� ���mi��AT` ��� . _ ' �
<br /> ��������������u��•���,��������e����c�►t��sE� °_".�„_- Y� lt'.���'�ILA°�
<br /> - A��#'7"l4�I�d►L. �'�S� . . . . . . : ` : - .
<br /> po�Tps �• EFFICIENT WATER HEATING�b:
<br /> l� BS!'dl.A�,�y'��pO�yD�y�rd��talt�Gr��Fgy�y`,p1�yl1.Fa�Gs'g�f����9'�����,u���N�.�� � �. ����.�S^�fiW7���`�1ltiM�Hd �°�R� ���67�.�6J���.��6ir'�B
<br /> � +� � � iYV! V6/ts#rRL'975�611i9i46.�1 A 1�6�. � '
<br /> • � " Water heating system shall include one of the foltowing: ` �
<br /> �' A�-�-���E���'���`������� �X�����y�������A�����'� 2 �Y��'P,�$j�E�`.•�."� `;¢�-j- � ���a� �+,�C�� Gas,propane or oil water heater�vith a minimum EF of 0.82 ,�
<br /> 1� �''h�S1EA� ���.�'tt`1F-���L�°B �?�rr�b�1�'ri� . l.E _ .
<br /> ` 2e Gi1�ll.������(t��. BDA(�1�l�It$.tiL.A!`B°t0��lkdD T�. �bllQ��1!�'C�"t'��A1��i ���'�LL�F� or � . , -
<br /> 3. �„��{;��� �������� �, . �' ������.�d�ARI��,�'���y��$U�����D���.�,���1��9 . C Solar water heating supplementing a minimum standard water heater. Solar water '•; i
<br /> i 8R 01'�t���taN-��Pli�°�9�i��E�IS°e � '�� �� BY�4 Q GL��C�'i��,1�"�l�4 Cs°�.��`d''f �QR.
<br /> ���'1Q�1�t����Q�,lAN�7 A��° � 1'�
<br /> 4. �LU�@l�IG"�Y"�'�h4E�. ' � � �. �'�'t't�. 2� �
<br /> lQ�l
<br /> N�T r�o¢.� �'NaN o,c. C����,.
<br /> ` ... S. �iVA�{7���,1�Y Q'FL!lE�. � ��►�`'�`�l��l�F��.�i�y 4��dt°Ck��Fg,�S'1''RIl�p��A�Jp , ' o ( RC ) nnual Performance of OG-300
<br /> , a a a e o rp ,
<br /> �� j � � Soltr R rin p nd�C�rtificati n�Co Uorat vri gs o � �erm � ��
<br /> �
<br /> � .: . . ,1���JLA'[`_��............. .... , �. ��1��E����N H�tS�� °� . � • � • Certified Solar Water Heating Systems f i
<br /> s or ase on
<br /> . s. ��.�G'�'�UCAL DE�iC��l BY O"�ht�i�. �,�..�. . . .
<br /> �� 1�� 9.���
<br /> . . .. ...
<br /> ....
<br /> ; 7. I�t7'�tl�bf�1Rfi�H��y GAE31�1�'T,.�AA1t�L�AFlCN�1f,4��f���1��IS �� �. '�. ��'� �� ��,5� " b��... _...... ........ .. .� , ����1�1lI'�l����aA�E. ' d d
<br /> . .
<br /> ; � � B`1°OT��. • � "���'� �"''�'�.�"• "' ��� �� .��;�,�� .�������.�.� �� �'� �����XM1�1.��5`!'�fl����1U(�'�"$���yf�.'����r�f�� Electric heat pump water heater with a minimum EF of 2.0 and meeting the stan ar s << � �
<br /> ; �' � Q f
<br /> ' ��•�_ ��� �S..����,�. ��,4��+ `��,,,��, �� � � - ������ �� ��o�.,•� �' ��C.I�I EEA s Northern Climate p cifications for Heat Pu p Water Heaters '�
<br /> : - . . .
<br /> ;�s�� : . _:_ .�����`� ����� . ��►ai s�����,�����u����� ���
<br /> of N ' S e ' ' m �
<br /> � �J
<br /> �������.����� �i������. �°���. .. . ���
<br /> ; :; , . ��@ � . R��du��V s't'�fl.��t?�.��N`��L�.�&�'�'���f��i'f �
<br /> ���. ��"�,t,�".�°�,;�d�� �;� �+'� Q Water heater heated by ground source heat pump meeting the requirements of Option �^�"
<br /> , � �
<br /> . ��� . � .'?. ..:.��� ����cY . ...... �ts�����t���,����at�►t���t�,��i�s��c����r���
<br /> .��._.ns.�b"k:������.:'�P���o�..��i�4t�i� ���63�.� � ��'�'�����, �t�`���-�+ �, ���� �� ����t��v .
<br /> �o �,� � ,�� T �;
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<br /> o qualify to claim this credit,the building permit drawings sha11 specify the option ,
<br /> , �� : �� ,�,� � � ������ • 1C�!{�'1'��$UIJR���FIAV��C�l"11yt���Q������y,.�t� being selected and shall specify the water heater equipment type and the minimum ;
<br /> ��������a s���,!'��,�� ���" `°`" �� ����1"���.°�°��.il11911'�X��$�A13��'}.$11N G4����Dg��g�Ai- equipment efficiency and,for solar water heating systems,the calculation of the �
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<br /> ,,._. .�� �" � � � � �� . ��• minimum ener y savinps. � �
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<br /> . TA�LE Ft4D2.1.1 . . .. ...,.._._ ..:.,. ` �' ,�. . .
<br /> � � _ . � �b '
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<br /> INSULATIC7AI AND FENEST . � . �
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<br /> .
<br /> �JR�. JC� REMENTS BY COpAP��IENTa ° ��10/15/21.+TB" means R-10 cc�r:tirauous znsulati � � .
<br /> . . . , • ... �
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<br /> • � . on on the ��cterior of the w�ll, or R-15 on the continuous '
<br /> CLI `�:. , . . .
<br /> , �AA7E ZONE 5 AND MARiNE� � � : lnsulation or�the interior ofth�wal1,or R-21 cavity instalation pius a therrrial break between the stab aa:t� ' Tas���i��o7.a.s��> ;
<br /> - the basement wall at the inter'ro.r of the basement wall. "10/15/21.+TB" shail be errrii
<br /> _ ; . _ �: � ,�
<br /> FENESTFtAT10N U-FAGTORb i CQNfiiNUQUS 1MMOLE-MOUSE MECtdANICA!V�NTlLAT10N SYSTEM AIRFLOW RATE REQUlREMEPITS ' ? �`"'�"
<br /> 0.30 �� • • p tted to be ri2et with
<br /> 4�uE�.t�t��ut�ir j �.
<br /> 0.30 R-13 cavrty tnsulation on ti��interz�r of the basetnet�t wall plus�-5 co�tin�zous insulatior�a�tkte ir�terior NUM�ER OF BEDROOMS } ��y �
<br /> . � SkCYUGkiTb U-FACTOi� 0.50 � or exterior of the wall. "10/�3" means R-10 contir�uous insulation on the interior or exterior ofthe hom�, tsu��a efeeE� o�i 2-3 4-5 s-' >' `s •
<br /> � 0.50 ,} ,
<br /> oi•R-13 cavit y ;nsul a t'r o n a t t h e r n t e rior o f t he basemerit wa ll. "TB°' means therma) break between floor �: <1,soo so 45 60 �5 90
<br /> � Airflow tn CfM � �� ;'�,
<br /> GLAZED FEAlESTRATION SHCaC b'e NR NR slab and basement wall,
<br /> x 1,501-3,000 45 60 75 • � 90 165 � i
<br /> CEILIAIG R-VALUE �� 4.9 � 49 d R-10 continuous insulation is requir�d under heated slab ari grade floors. See R402.2.9,1. , , � '
<br /> �`3 QOl-4,500 60 75 90 105 120
<br /> � ; ,,:. ` • '
<br /> � 1�100D�RA�l1E WALL9'k'{R�VALUE z 1 lrit e Thexe are no SHUC reqziirements in the Marine Zone. �4,501-b,000 75 90 105 120 135
<br /> . � ;� j ;
<br /> � z�+5C1 f Basement wall i n s u l a t i or� is no t r�c�uired in warm-k�umid loeations as defined b Fi ure R30I. �.6,0 01-7,540 90 105 120 135 150 �
<br /> AAa�s '1�lall R-Value' 21/21" 21+5" R301.1. Y g 1 and Tabie ' `. .
<br /> � >7,500 105 120 . 135 I50 16S � ' i
<br /> FLOOR R-VALU� 3Q� 30a g Reserved. � � . ( .
<br /> BELOVI!-$�sRADE ' WALL FZ-VALUE �
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<br /> _. _ __------- - �
<br /> ''F z z�s t v a lue is cavi ty i�sulation, second is continuous insulation or insulafed siding, so "13.+5" means R-13 ' _ � ;
<br /> _�
<br /> c � 10/15%21 int+TB 10/15/21 in#+TB
<br /> cavity insulation plus R-5 continuous insulation or insulated siding.If stxuetural sheathing eovers 40 � � ' �
<br /> � SLAB� (?,-VALUE$c DEPTH �
<br /> 10,2 ft j Q,4 ft percent or less of the exteri o r,c o n t i n u o u s i nsulation R-value shall be permitted to be reduced b no more �
<br /> y �. E
<br /> than R-3 in the locations where structural sheathing is used to maintain a consistent total sheatlaing
<br /> - ' For SI: 1 foot .= 3Q4.8 mm, ci .=continuous insulation, int .=intermediate frammg. thickness. � '
<br /> a R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavity which �The second R-value appiies when more than halfthe insulation is o�i the interior of the mass wall.
<br /> is Iess than the label or design thickness of the insulation,the compressed R-value of the insulation from ' For single rafter-or joist-vaulted ceiliMgs, the insulatic�n may be reduced to R-38.
<br /> Appendix Table A101.4 shall not be less than the R-valu�specified in the table. �`Int. (intermediate framing} denotes standard framin 16 inches on
<br /> g center with headers insulated tivith a � ��-
<br /> b The fenestration U-factor coluznn excludes skylights. The SHGC column applies to ail glazed fenestration. minimt�m of R�14 insulation. � � �
<br /> Exception: Skylights may be excluded from glazed fen�stration �HGC requirements zn Climate Zones �Lo and solid timber walls with a minimum avei•a e thickness of 3.S ' b
<br /> 1 through 3 where the SHGC f.or such skylights does not exceed 0.30. g g tnches are exempt fxom this insulation � �
<br /> requirement. . . , ,. . .
<br /> - . ;.
<br /> ' �'HE COMPL�7� UNE/625�6� �•
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