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<br />CUR —A —VENT OR EQUIV "IN —VENT'
<br />ROOF INTAKE VENT STRIP INSTALLED
<br />36" FROM EDGE OF EAVE (OUT I"
<br />WIDE STRIP IN PLYWOOD 0 VENT)
<br />$0LID BLOCK, CUT TO FIT TIGHT
<br />AGAINST TOP PLATE & SHEATHING—
<br />W/(4) 8d NAILS EACH BLOCK
<br />14-OUVEI 01_S__ALlJQffD_J&BLQ_C__K
<br />2012 IBC — TABLE R3011(1)
<br />TRUSS &. EAVE-DETAIL
<br />oaf
<br />11507.3 WholeLhouse mechanical ventilation system. Whole —house mechanical
<br />ventilation systems shall be desiped in accordance.with Sections M1507.3.1 through
<br />M1507Z.3.
<br />M1507.3.1 System design. The whole"house ventilation system shall consist of one ' or
<br />more supply or exhaust fans, or a combination of such, and associated ducts and
<br />controls. Local exhaust or supply fans are permitted to serve as such a system.
<br />Outdoor air ducts connected to the return side of an air handier shalt be considered
<br />to provide supply ventilation.
<br />M1507.3.2 System controls, The whole —house mechanical ventilation system, shall be
<br />provided with controls that enable manual override.
<br />M1507.3.3 Mechanical ventilation rate. The wholehouse mechanical ventilation system
<br />shall provide outdoor air at a continuous rate of not less than' that determined in
<br />accordance with
<br />th Table M1507°3.3(1).
<br />Exception,The Vhole—house mechanical ventilation system is permitted
<br />to operate intermittently where the system has controls that enable
<br />operation for not less than 25-percent of each 4—hour segment and the
<br />ventilation rate prescribed in Table M1507.3.3(1) is,multiplied by the factor
<br />determined in accordance with Table M1507Z.3(2)-
<br />TABLE M1 507.3.3(l)
<br />COS WHOLE -HOUSE MECHANICAL VENTILATION SYSTEM AIRFLOW WE REQUIREMENTS
<br />DWELLING UNIT NUMBER OF BEDROOMS
<br />FLOOR AREA 7-
<br />0-1 J
<br />=
<br />.(square feet) Air -flow In CFM
<br />< 11500 30 45 60 75
<br />90
<br />11501-31000 45 �60 75
<br />go -
<br />105
<br />3,001-4,500 60 75 go
<br />10 6;
<br />120
<br />4,501-6-00.0 75 90 105
<br />120
<br />135
<br />6,001-7,500 90 105 120
<br />135
<br />150
<br />> 7,5 100 120 135
<br />95U
<br />165
<br />For Y, -1 squore foot I cubic, foot per minute O°O 047 9 M3 s.
<br />TABLE M150.7.&3(2)
<br />INYERMITTENT WHOLE -HOUSE MECHANICAL VENnLA` 10N RATE FACTORS"Ib
<br />B'T
<br />7ffU_k-'!M_E PERCMTAGE IN EACH 4-4H110UR
<br />"U
<br />T 507
<br />_G 25% 33% 50%
<br />SEGMENT -
<br />16% 7
<br />F tora
<br />actorO 4 .3 2-
<br />a. For ventilation system run time values between those given, the factors are prrnitted to be determined by
<br />int4polation.
<br />b. Extrapolation beyond the table Is prohibited.
<br />5. RETURN AIR MUST BE DUCTED, (NON —DUCTED JOIST- PAYS NOT ALLOWED).
<br />a
<br />a
<br />Prescelptive Energy Code Compliance for All Climate Zones in Washington.
<br />All Climate Zones
<br />R—Valuel
<br />Te -,;�t� r
<br />'n/a
<br />Uo__
<br />Skylight U—Factor
<br />n/a
<br />0.50
<br />Glozed Fenestratio'n SHOC bay
<br />n/a
<br />n/a
<br />Ceiling
<br />491
<br />0026
<br />Wood Frame Wall
<br />21 int
<br />21/21h'
<br />0.056
<br />Floor
<br />0®9
<br />Below Grade Wall
<br />10/15/21 int + TB
<br />U42
<br />Slab R—Value & Depth'4
<br />0, 2 ft M
<br />�/(a
<br />For % I foot = 304.8 ream, o' .=: continuous insulation. Int .= Intermedlate framing,
<br />a, it —values are and SHGC. are MaXIMUM0. men insulation is Installed In o cavity which is less than
<br />the lqbd or design tindiness of the ifisulotlan, thp nprWR_"jue of the Insulation *m Appendix fable A101.
<br />4
<br />sheen not be less than the R—yalue specified in ft t0it
<br />b. be fenestrotimi U—factor collann excludes skylot% be SHGC colt are applies to 61 glazed fmastmflon-
<br />Fxmpdone Skylights may bb excluded from glazed fenestration S1400 req*omenl:8 in Clinte Zones 1 through 3.whorc
<br />the SHGO for such skylights -does not exceed =
<br />c. 10/15/21AW" means ka,10 continuous irlb-ulation on the exterior of the wall, or R-15 on the continums InsulbilOn 00
<br />the Interior of the wall, or R-21 cavit insulotlo) pits a thermal bredk between the slab and the bawnent -wall at tilt
<br />infedor of the basement 72L+W shall be penrilited to be met with R-13 MAY i"NIOVOR on the Interior of the
<br />basam&nt wall plus R-5 continuous Insulation on the 100ficr Or exterior of the wall, '10/13* 'means R-10 continuous
<br />insulation on the Interior or oxterior of too home or R-13'eaVay ffisdotlon at the interior of the basement well. W moons
<br />thermal brook between floor dab and basement walL
<br />d. R-10 cmthuous Irisolation is required under heated slab on grade floors, See R4012,91
<br />e. There are no S-400 requirernots In the Milne 201.
<br />f, Boseflifflt well insulation Is not rocluk ad in warm—hoeid locations os, dellned by Figure R301.1 and Toble R301 1
<br />g. Reaerved,
<br />h. Firsi value is cavity insulation, second is oonfinuous insulation or insulated siding, so '13.+5' Means R-13 cavity
<br />Insulation plus R-5 continuous Insulation Of fhouloted sidding. if stmoturol sheathing c%ters 40 percent or less Of the
<br />exterior, tonflouous 10suInflan 11—vaim moll be pamMed to be reduced by no more than R-3 in the t0c0fts where
<br />structural sheathing is rand. to maintain a consistw(st total sheathing thickness,
<br />1, be second flvalue applies when more than half the insulotion is on the interior of tho Mass. Wall,
<br />I For dngto rafter— -or jai—voulted ceilings, the insulation may be reduced to R-38.
<br />k, framing} denotes stondord framing 16 inches on center with headers insulated with o rolnimurn of
<br />R-10 !"Solotleft.
<br />1, Log and solid timber walls with a mtrthnum overage thiften of 15 wles are exempt from this insular" require"Ient.
<br />or IWAoge testing for all now
<br />houses caul additiono. ace requirement is rraot if the tructtire has a leakage rate of 5 air changes per hour
<br />whop depressurised rvitfa a blower dear to ascaois or 1 (SACfI ): A Posed is a meosurement of Pre3sur0
<br />24g Pasuls era sequel to of water caultirrrr,. pia test nisi be ed using a Blower Door device Which'
<br />Monsist8.0 a largo fan, a frame and parioi A a gauge) is used to read house and fan
<br />pressures.
<br />14%C- states that the test may be perforrood at any time after rough in, All penetrations in the building
<br />mWope must be sealed including those for utillties, plumbing, 0140T,1001, ventilation and Combustion
<br />ap, pliances. The code also stotes that when reliqlred by the building Official, the test shall be conducted by an
<br />approved third party.
<br />To conduct the test
<br />1. Close all windaws,. doors and fireplace and stove doom.
<br />2. Close all dampers including exhaust, intake, makup air, backdraft and flue dampers. Sinca you will
<br />be deprentirIz4 the house, dampers in both fans, etc. Will be sucked closed during the test and will
<br />therefore not negatively affect tho resuft.
<br />3> Mc4ke sure plumbing traps ore filled with water.
<br />4. Leave doom between heated areas open.
<br />5. Opera access hatches to conditioned attics and/or conditioned trawl spaces. Leave hatches closed if
<br />these, are unconditioned areas.
<br />& Seat exterior openings for continuously operating vankilation syAws and heat recovery ventilators,
<br />7. Turn off heating and cooling systems but do not seal gipply or re -turn registers.
<br />8. A4just all combustion appliances so that th0Y do not tutfl on, during the t6it
<br />9. Wall the blower door in an exterior door opening nod connect hoses from the alonomOter to the
<br />blower door fon and 'the exterior pressure tflp. See man0ftations for correct set-up.
<br />10. Depressurize the house to -50 Poscok
<br />fl.' Record the How rate (with simple neon ometers, the fan pressure, (Pa) is converted bW% 0
<br />low table. Many digitol manometers odd with blower doom con automatically perform this
<br />cony ore, and display, Oftily.) Consult your blower door and monomebw manuals.
<br />You now must convart the low rate (CFW) to AC6 Use the following IbMIUIC
<br />ACH50 - (CFM50 X 60) / Volume
<br />sere: ACH50-Air Changes per Hour at -50 Pasols
<br />CFM50 X 60 = converts 0ible Feet per Minute to Cubit Feet per flour
<br />Volume - %aditioned floor area of the housing unit multiplied by the oiling height
<br />Exampiv A blower door test has been done on a 2,000 square foot house and the fan flow (CF00)-rote
<br />is 1100 GFM.
<br />A0450 = (CFM50 X 60) /. Volumo
<br />0150 = (1100 X 60) / (2000 X 8)
<br />AW50 = 66,000/16,000
<br />AC1150 =- 4.1
<br />Since the code requires the ACHso to be less than 5, this hoijue complies with an AGMof 4,1-Record.-lbe.
<br />ACH w on the energy certificoto, on or near the electrical panel.
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