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R�sid�nti�l En�r� � V�����at��n W'�rkshee� • Additional Energy Efficiency Requirements
<br /> Per Tabie R406.2 of the Washington State Energy Code,each dwelling unit in a residential buildin�must achieve the foNowing
<br /> ' Whole-House Ventilat�on minimum number of creciits.
<br /> ' Select one of the following methods. Type/Description Credits Required
<br /> � A. Fresh air will be circu(ated by the central forced air furnace.The furnace must have afresh air intake duct and the blower Smal( Dwelling Unit 1.5 credits
<br /> must be activated by a timer to circulate air a totai of 8 hoursdaily. . Dwelling units less than 15oo square feet in conditioned floor area with(ess than 300 square feet of
<br /> , ❑ B. Fresh air wilf be supplied by wali or window vent ports in each bedroom, kitchen, living room and other habitable rooms fenestration area.
<br /> along with a whole-house exhaust fan.The exhaust fan,which usually does double duty as a laundry ar bathroom fan, and must • /�dditions to existing buiiding more than 500 square feet of heated Noor area but fess than �.500 square feet.
<br /> be controlied by a timer set to operate according to the fan sizes and time schedules below.The table below assumes a
<br /> residence of 3000 square feet or less. Medium Dweiling Unit 3.S cre its
<br /> _. � Dwelling units with more than 1500 sq ft and less than 5000 sq ft of conditioned ffoor area
<br /> Continuous Operation 12 Hours/Day ; • Aciditions to existing building with 1500 square feet or rriore of heated floor area.
<br /> 1 bedroom 45 cfm 90 cfm Exception: Dwelling units serving R-2 occupancies require 2.5 credits.
<br /> 2-3 bedrooms � 60 cfm 120 cfm Large DweNing Unit i i
<br /> 4.5 credits
<br /> 4-5 bedrooms 75 cfm 150 cfm • Dwel(ing units with 5000 square feet or more of conditioned floor area.
<br /> Exception: Dwelling units serving R-2 occupancies require 2.5 credits.
<br /> ❑ C.A heat-recovery ventilation system with minimum CFM flow rates as shown in option E3. � � � ^ 0.5 credits
<br /> Additions of 500 square feet or less
<br /> � Source-Specific Exhaust Ventilation & Fan Efficiency T
<br /> Required in each kitchen, bathroom, water closet compartment, laundry room, indoor swimming pool, spa and other rooms where The following options are commonly chosen to achieve the required number of credits.See section R4o6 for complete list of �
<br /> water vapor or cooking odor is produced. (!RC M-1507.�) Fan efficiency fram WAC 51-1J.R--Table R403.6.1. options.
<br /> ► • Option 3a (1.;0 Credits}-A gas, propane or oil-fired furnace with a min AFUE of 94%.
<br /> Minimum Source-Specific Ventiiation Capacity Requirements . O tion 3 1.0 Cre its -Duct ess Sp it System f-ieat Pump ocate in t e mam zone o t e addition.
<br /> �s Bathrooms-Utility Rooms Kitchens In-line fan Y p, . Option 5a (0.5 Credits -Al) new s owerhea an kitchen sink faucets rate at 1,75 GPM or ess an a new avatory
<br /> Intermittent(y operating 50 cfm 100 cfm faucets rated
<br /> � Continuous operation � 20 cfm 25 cfm • Option 5b(1.0 Credits)-A gas, propane or oil-fired �vater heater with a min EF of 0.74. .
<br /> Air Flow Rate Minimum(cfm) 10 90 Any Any • Option 5c(1.S Credits}-A gas, propane or oil-fired water heater with a min EF of 0.91
<br /> `Minimum Efficacy(cfm/watt} 1.4 cfm/watt 2.8 cfm/watt 2.8 cfm/watt 2.8 cfrr�/watt The drawings included with the building permit application shall identify which options have been selected and the point value of
<br /> Air fiow Rate Maximum(cfm} > o � Any Any a,ny each option, regardless of whether separate mechanical, plumbing, electrical, or other permits are utilized for the project.
<br /> � � Other Code Requirements -
<br /> • tnsulation and Windows Section 502.4.5 of the Energy Code requires that the building envelope be tested(normally referred to as a "blower door test")to
<br /> Prescriptive energy code compfiance for Climate Zone Marine 4: determine that air leakage is within acceptable levels.A feakage of.00030 SLA measured at 50 pascals is considered acceptable.
<br /> Sea(ing of doors, windows,ducts or registers is not allowed during testing.
<br /> Fenestration S Ceiling Vautted Wood Framed Mass Wall Below-Grade Framed Slab R-Value
<br /> Component veriicat overhead w/Attic Ceiling Wall{Int.)2 (Above grade} wal!z� Floor &Depth Section 503.�0.2 requires leakage testing of the mechanical ducts to insure that the ducts are sealed.Testing may occur at rough-in
<br /> or post-construction.Testing must comply with standard RS-33. lndividuals performing the test must be approved or certified by the
<br /> Prescriptive 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. Washington State University Energy Office or approved other agency.
<br /> Va{ue max, max. min. m�n• Int.+TEi min. 2'depth
<br /> , Section 505.1 requires that 75%of all Iuminaires{lights and lamps) be high efficiency.
<br /> 1.Fenestrationisdefinedasskylighis,roofwindows,verticalwindows(fixed ormoveable),opaquedoors,glazeddoors,glazedblockandcombination opaque/glazed SeCtiotl 1Q5.4 requires that a certificate be posted within three feet of the electrical panel, completed by the builder or design
<br /> doors.Fenestration includes products with glass and non-glassglazing materials. �,
<br /> - 2.Int.(intermediaYeframing)denotesstandardframingl6"o.c.withheadersinsulatedwithaminimumR-10insulation. profeSsiUt1al,and include the following information. R-values for ceiling, walls, floors, foundation, U-factors for windows,the type
<br /> a."10/15/21+TB'�means R-10 continuous insulation on the exterior of the wall,or R-15 on the continuous insulation on the interior of the wall,or R-zz cavity and efficiency of heating/coofing equipment, duct leaka�e rates from the duct testing, and the air leakage rates from the bfower
<br /> insulation plus a thermal break between the slab and the basement wall at the interior of the basement wall."10l15/21+Ta"sha(I be permitted to be met with R-13 door testing.A cerkificate will be provided for your use at time of permit issuance.
<br /> cavity i�sulation on the interior of the basement wal{�lus R-5 continuous insulation on the interior or exterior of the wall."Ta°means thermal break between ffoor
<br /> slab and basement wall.
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<br /> � � � � 717`l BUTLER HILL RD
<br /> EURLIDlGTON WA-98233 �l.C.B.D.C.
<br /> ,-Jpqho 360-75T06H5,.
<br /> / � ��?�5���° howdesigns@wavecable.com �\�r�=�
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