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<br /> il i, i'I', Per Table R406.2I of the Washington State Energy Code,each dwelling unit in a residential building must achieve the following .
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<br /> '� � ; � minimum number of credits.
<br /> . Whole-House Ven$ilat6on
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<br /> . . . � Y . . _ . . . . . . . . . . � . . . . � .. � ' . . � . .. � ' � �
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<br /> I '���' ' ' ' Se(ect one of the followin methods. • � Credits Re uired
<br /> i I� g Type/Description g
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<br /> , 1.5 cred t
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<br /> v 'r intake
<br /> duct and the blowe .
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<br /> �II i 3, . A. Fresh air will be circulated b the central forced air furnace.The furnace must ha e afresh ai g
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<br /> �''� '� � �" must be activated by a timer to circulate air a total of 8 hoursdaily. ,
<br /> i, � :. Dwelling units fess than 1500 square feet fn conditioned fioor area with less than 300 square feet of �
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<br /> 'I'' i fenestration area.
<br /> I� �, j I� ' ❑ B. Fresh air will be supplied by wali or window vent ports in each bedroom, kitchen, living room and other habitable rooms � .
<br /> i i e Additions to existing building more than 500 square feet of heated#loor area but less than 1500 square feet.
<br /> I � . along with a whole-house exhaust fan.The exhaust fan,which usually does double duty as a laundry or bathroom fan, and must , .
<br /> ' i�I� I� ' � `'' ` be controlled b a timer set to o erate accordin to the fan sizes and time schedules below.The table below assumes a . . � . 3.5 cre its ' �
<br /> �� i i Y p g Med�um Dwelimg Unit
<br /> ��I II j ' _ residence of 3000 squa�e feet or less. i ,
<br /> ', � . i an and i o area
<br /> ,� Dwelling un'ts with more th 1500 sq ft less than 5000 sq ft of condit'oned fl or
<br /> � I , � �' ,�; . � : Continuous Operatian , 12 Hours/Day tions to existing building with 1500 square feet or more of heated floor area. � � '
<br /> � ... . . _.... ._ , .. ... . . m Add� , .
<br /> I„ I I I I� : 1 bedroom ; 45 cfm � .90 cfm ' xception: elling units serving R-2 occupancies require 2.5 credits. •
<br /> �� ; E Dw
<br /> I�I � I I . . 2-3 bedrooms > 60 cfm . 120 cfm
<br /> . Large D'weiling Unit 4.5 credits '
<br /> � ` ' ` • Dwelling units with 5000 square feet or more of conditioned fioor area. '
<br /> I' i�I i ' 45 bedrooms 75 cfm , 150 cfm � .
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<br /> 'y � Exception,Dwelljng units serving R-2 occupancies require 2.5 credits. . ".
<br /> I � il ❑ C.A heat-recovery ventilation system with minimum CFM fiow rates as shown in option B. Additions af 500,square feet or less 0.5 credits �
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<br /> , �, i I Source-Specific Exhaust Ventilation & Fan'Efficiency � •
<br /> i ; . The foNowing options are common{y chosen to achieve the required number of credits.See section R406 for complete list of
<br /> ' I � Required in each kitchen, bathroom,water closet compartment, laundry room, indoor swimming pool,spa and other rooms where �
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<br /> '� �I �I �I r water vapor or cooking odor is produced. (IftC M-1507.4)Fan efficiency from WAC 51-11R-Table R403.6.1. options. I ' � �
<br /> I, (''I I ' ,� � + ,Option 3a(1.O Credits}-A gas, propane or oil-fired furnace with a min AFUE of 94%. �
<br /> � �� � ' � ' M i n i m u m S o u r c e-S p e c i fic Ventilation Ca pacit y Re quirements ' . I
<br /> � , � • O tion 3 1.0 Cre its -Duct ess Sp it System Heat Pump oca te in t e mam zone o t e a d di tion. •
<br /> I,' ii�I; I��� Bathrooms-Utility Rooms Kitchens In-line fan p,s . ,Option Sa(0.5 Credits -All new s owerhea an kitc en sink aucets rate at 1J5 GPM or ess an a new avatory � : '
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<br /> I � ��� ' Intermittently operating 50 cfm 100 cfm faucets 'rated
<br /> �I ��'�, I � e ,Option 5b(1.0 Credits)-A gas, propane or oil-fired water heater with a min EF of 0.74.
<br /> I�I� � �I • r. '. ' Continuous operation 20 cfm 25 cfm i ' �
<br /> ��, � . � ',Option 5c(1.5 Credits)-A gas, propane or oil-fired water heater with a min EF of 0.91
<br /> � , Air Flow Rate Minimum(cfm) 10 90 Any Any
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<br /> �,� i ' ' Minimum Efficacy(cfm/watt) 1.�cfm/watt 2.8 cfm/watt 2.8 cfm/watt 2.8 cfm/watt The drawings included with the building permit application shall identify which options have been selected and the point value of
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<br /> � I ' Air Flow Rate Maximum(cfm) > 0 Any Any Any each option, regardless of whether separate mechanical, plumbing,electrical, or other permits are utilized for the project. '
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<br /> � �,�; . � � Other Code Requirements
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<br /> , ;'I� ' �1'1SU��tIOC1 �t1d WICI(�OWS Section 502.4.5 oif the Energy Code requires that the building envelope be tested(normally referred to as a"blower door test")to
<br /> I'� �� 'I I 1 I � - - determine that air leakage is within acceptable levels.A feakage of.00030 S!A measured at 50 pascals is considered.acceptable. , ,
<br /> I i, i I' ,I _ Prescriptive energY code compliance for Climate Zone Marine 4: , i ..
<br /> � . � Sealing of doors,windows,ducts or registers is not a�lowed during testing. • .
<br /> ' li I� : Fenestration 1 Ceiling Vaulted Wood Framed Mass Wall f3elow-Grade Framed Slab R-Value '
<br /> ' 'i w Attic Ceilin Wall Int. 2 (Above grade) wa11 z� Floor &�epth Section 503.10.2I,requires leakage testing of the mechanical ducts to insure that the ducts are sealed.Testing may occur at rough-in ,
<br /> 'I,� I I� . , � ' Component verticat overhead � g � � or post-construcfion.Testing must comp{y with stancfa�d RS-33. Individuals performing the test must be approved or certified by the ; �
<br /> ' ��'� , } . . Washin 'ton State University EnergyOffice or approved other agency. �
<br /> i , I ,_ Prescrtptive U.0.30 U.0.50 R-49 R-38 R-21 min. R-21 min. R-10/15/21 R-30 R-10 min. g i
<br /> '� i �i Value max. max. min. min. lnt.+TB min. 2`depth I �
<br /> I,� ,� ' ' • Section 505.1 requires that 75%of all luminaires((ights and lamps) be high efficiency. � �
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<br /> ` ' 1.fenestration isdefinedassk li hts roofwindows verticalwindows flxed ormoveable o a uedoors,glazeddoors,glazedblockandcombination opaque/glazed ' ' ' 'ca be osted within three feet of the electrical anel COm leted b the builder or design t
<br /> �,i � I i v g , , ( )� p q Section 105.4 requires that a certifi te p p , p Y
<br /> , I I ,; ` ` doors.Fenestrationincludesproductswithglassandnon-glassglazingmaterials.
<br /> , „ pro fessiona l,an d inc lu de t he fo l lowing in forma tio n. R-v a l u e s f o r c e i l i n g,w a l l s,f l o o r s, f o u n d a t i o n, U-f a c t o r s f o r w i n d o w s,t h e t y p e -
<br /> I',' ��i 'I ,% " 2.Int.(intermediate framing)denotes standard framing 16 o.c.with f�eaders insufated with a minimum R-10 insulation. . :. ' . • . • " e blowef ' '
<br /> �, , �= and efficiency of heating/cooling equipment,duct leakage rates from the duct testing;and the atr leakage rates from th ; ,
<br /> � i : , , > • � �. 3,"10/15/21+TB"means R-10 continuous insulation on the exterio�of the wall,or R-15 on the continuous insulation an the interior of the wall,or R-21 cavity
<br /> '' �� ' ' ' ' i • � i r' f the basement walL"10 15 2i+Ts"shall be ermitted to be met withR-13 door testing:A certificate will be provided for your use at time of permit issuance. � '�' ' � '
<br /> ,� ,�I I , - ;. �, . � msulation plus a thermal break between the slab and the basement wall at the nte ior o / / P I ,
<br /> I� �',�i ' cavity insulation on the interior of the 6aseinent wall plus R-5 continuous insulation on the interior or exterior of the wall,"TB"means fhermal break between floor
<br /> �, i�II� �i slab and basement walL II � I I
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