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Simple Heating System Size: Washington State <br />MECHANICAL VENTILATION <br />Section M1507-Mechanical ventilation. <br />Whole House Ventilation (Prescriptive) IRC Sec. M1507.3 & WAC 51-51-1507 <br />M1507.1 General. Local exhaust and whole -house mechanical ventilation <br />systems & equipment shall be designed in accordance with this section. <br />M1507.2 RECIRCULATION of air. Exhaust air from bathrms and toilet rms <br />shall not be re -circulated within a residence and shall be exhausted directly <br />to outdoors. Exhaust air from bathrms & toilet rms shall not discharge into <br />attic, crawlspace or other areas of the building. <br />M1507.3 Whole -house mechanical ventilation system. <br />Whole -house mechanical ventilation systems shall be designed in accordance <br />with Sections M1507.3.1 through M1507.3.3. <br />Section M1507.3 of the high efficiency fan (maximum 0.35watts/cfm), not <br />interlocked with the furnace fan. Ventilation systems using a furnace including <br />an ECM motor are allowed, provided that they are controlled to operate at low <br />speed in ventilation only mode. <br />M 1507.3.1 System design. <br />The whole -house ventilation system shall consist of one or more supply or <br />exhaust fans, or a combination of such, and associated ducts and controls. Local <br />exhaust or supply fans are permitted to serve as such a system. Outdoor air ducts <br />connected to the return side of an air handler shall be considered to provide supply <br />ventilation. <br />M 1507.3.2 System controls. <br />The whole -house mechanical ventilation system shall be provided with controls <br />that enables manual override. <br />M1507.3.3 Mechanical ventilation rate. <br />The whole -house mechanical ventilation system shall provide outdoor air at a <br />continuous rate of not less than that determined in accordance with Table <br />M1507.3.3(1). <br />Exception:. The whole -house mechanical ventilation system is permitted to operate <br />intermittently where the system has controls that enable operation for not less <br />than 25-percent of each 4-hour segment and the ventilation rate prescribed in <br />Table M1507.3.3(1) is multiplied by the factor determined in accordance with <br />Table M1507.3.3(2). <br />WINDOW OR WALL PORTS: IRC M1507.3.4.4 Outdoor air shall be distributed <br />to each habitable room by individual outdoor air inlets. Individual room outdoor <br />air inlets shall have a controllable and secure opening and be capable of a total <br />opening area of not less than 4 square inches. Outdoor air inlets shall be located <br />so as not to take air from within 10 feet of a plumbing vent opening, or an <br />appliance vent outlet, or where it will pick up objectionable odors, fumes or <br />flammable vapors. Where outdoor air supplies (window or wall ports) are separated <br />from fan locations by doors, adequate air flow shall be ensured by <br />undercutting doors or installing grilles or transoms. Doors shall be undercut to a <br />min. of above the surface of the finished floor covering. <br />WHOLE HOUSE VENTILATION (Prescriptive) <br />I RC Sec. M1507.3 and WAC 51-51-1507 <br />Intermittent prescriptive Whole House Ventilation Systems and <br />provide Run Time 33% per Table M1507.3.3(2). 1 hour 20 Minute <br />run time for each 4 hour segment. <br />Run -Time Percentage in Each 4-Hour Segment. <br />Factors <br />4(25%); 3(33%); 2(50%); 1.5(66%); 1.3(75%); 1.0(100%) <br />M1507.3.3 Mechanical ventilation rate. The whole -house mechanical <br />ventilation system shall provide outdoor air to each habitable space at <br />continuous rate of not less than that determined in accordance with <br />Table M1507.3.3 (1): <br />Continuous Whole -House Mechanical Ventilation System Airflow Rate <br />Reqmt's >4 bedrooms (3001-4500sf) = 90cfm Airflow in CFM <br />Whole House Ventilation system using exhaust fans & window or wall <br />fresh air vents (M1507.3.4) <br />Window, Skylight and Door Schedule <br />rr <br />rr/ <br />1/ <br />111 <br />rr <br />Irr <br />rr <br />rrl <br />Sum of Vertical Fenestration Area and UA 1 999.51 293.47 <br />Vertical Fenestration Area Weighted U = UA/Area 1 0.29 <br />Overhead Glazing (Skylights) <br />Component Width Height <br />Description Ref. U-factor Qt. Feet Inch Feet Inch Area UA <br />/r <br />rlr <br />Sum of Overhead Glazing Area and UA 1 0.01 0.00 <br />Overhead Glazing Area Weighted U = UA/Area 1 0.00 <br />Total Sum of Fenestration Area and UA (for heating system sizing calculations) 1 999.5 293.47 <br />This heating system sizing calculator is based on the Prescriptive Requirements of the 2012 Washington State Energy Code (WSEC) and ACCA <br />Manuals J and S. This calculator will calculate heating loads only. ACCA procedures for sizing cooling systems should be used to determine cooling <br />loads. <br />The glazing (window) and door portion of this calculator assumes the installed glazing and door products have an area weighted average U-factor of <br />0.30. The incorporated insulation requirements are the minimum prescriptive amounts specified by the 2012 WSEC. <br />Please fill out all of the green drop -downs and boxes that are applicable to your project. As you make selections in the drop -downs for each section, <br />some values will be calculated for you. If you do not see the selection you need in the drop -down options, please call the WSU Energy Extension <br />Program at (360) 956-2042 for assistance. <br />Project Information <br />Contact Information <br />ERICKSON SFR <br />ICLAY and KAMI ERICKSON <br />2401 TAYLOR DR <br />EVERETT, WA 98203 <br />Heating System Type: O0 All Other Systems <br />O Heat Pump <br />To see detailed instructions for each section, place your cursor on the word "Instructions". <br />Design Temperature <br />Instructions <br />Design Temperature Difference (AT) 47 <br />k <br />A =Indoor (70 degrees) -Outdoor Design <br />Temp <br />Area of Building <br />Conditioned Floor Area <br />Instructions Conditioned Floor Area (sq ft) <br />3.737 <br />Average Ceiling Height <br />Conditioned Volume <br />Instructions Average Ceiling Height (ft) <br />9.5 <br />35,502 <br />Glazing and Doors <br />U-Factor <br />X Area = <br />UA <br />Instructions <br />299.85 <br />0.30 <br />1,000 <br />Skylights <br />U-Factor <br />X Area = <br />UA <br />Instructions <br />0.50 <br />--- <br />Insulation <br />Attic <br />U-Factor <br />X Area = <br />UA <br />Instructions <br />0.026 <br />1 1,646 <br />42.80 <br />Single Rafter or Joist Vaulted Ceilings <br />U-Factor <br />X Area <br />UA <br />Instructions - <br />No selection <br />Above Grade Walls (see Figure r) <br />U-Factor <br />X Area <br />UA <br />Instructions t > . "' <br />�� ;' <br />0.056 <br />3,333 <br />186.65 <br />Floors <br />U-Factor <br />X Area <br />UA <br />Instructions ' <br />0.029 <br />456 <br />13.22 <br />Below Grade Walls (see Figure 1) <br />U-Factor <br />X Area <br />UA <br />Instructions <br />0.042 <br />44 <br />1.85 <br />Slab Below Grade (see Figure 1) <br />F-Factor <br />X Length <br />UA <br />In$tPUCt10RS - <br />0.570 <br />44 <br />25.08 <br />Slab on Grade (see Figure 1) <br />F-Factor <br />X Length <br />UA <br />Instructions $ �`" w - <br />0.540 <br />F 153 <br />82.62 <br />Location of Ducts <br />Instructions gm, gggv - <br />Duct Leakage Coefficient <br />1.10 <br />Figure 1. <br />AboveG-rada <br />r <br />s <br />Sum of UA <br />652.07 <br />Envelope Heat Load <br />30,647 Btu / Hour <br />Sum of UA X AT <br />Air Leakage Heat Load <br />18,021 Btu / Hour <br />Volume X 0.6 X oT X .018 <br />Building Design Heat Load <br />48,668 Btu / Hour <br />Air Leakage - Envelope Heat Loss <br />Building and Duct Heat Load <br />53,534 Btu / Hour <br />Ducts in unconditioned space: Sum of Building Heat Loss X 1.10 <br />Ducts in conditioned space: Sum of Building Heat Loss X 1 <br />Maximum Heat Equipment Output <br />74,948 Btu / Hour <br />Building and Duct Heat Loss X 1.40 for Forced Air Furnace <br />Building and Duct Heat Loss X 1.25 for Heat Pump <br />All Climate Zones <br />R-Value' <br />U-Factor' <br />Fenestration U-Factorb <br />n/a <br />0.30 <br />Skylight U-Factor <br />n/a <br />0.50 <br />Glazed Fenestration SHGC',a <br />n/a <br />n/a <br />Ceilingk <br />49' <br />0.026 <br />Wood Frame Wal19,10n <br />21 int <br />0.056 <br />Mass Wall R-Value" <br />21/21h <br />0.056 <br />Floor <br />309 <br />0.029 <br />Below Grade Wallc,m <br />10/15/21 int + TB <br />0.042 <br />Slab R-Value & Depth ` <br />10, 2 ft <br />n/a <br />*Table R402.1.1 and Table R402.1.3 Footnotes included on Page 2. <br />Each dwelling unit in a residential building shall comply with sufficient options from Table R406.2 so as to <br />achieve the following minimum number of credits: <br />1. Small Dwelling Unit: 1.5 credits <br />❑ Dwelling units less than 1500 square feet in conditioned floor area with less than 300 square feet of <br />fenestration area. Additions to existing building that are greater than 500 square feet of heated floor area but <br />less than 1500 square feet. <br />rx� 2. Medium Dwelling Unit: 3.5 credits <br />All dwelling units that are not included in #1 or #3. Exception: Dwelling units serving R-2 occupancies shall <br />require 2.5 credits. <br />3. Large Dwelling Unit: 4.5 credits <br />Dwelling units exceeding 5000 square feet of conditioned floor area. <br />4. Additions less than 500 square feet: .5 credits <br />Table R406.2 Summary <br />Option Description Credit(s) <br />1 a <br />JEfficient Building Envelope 1 a <br />0.5 <br />1 b <br />Efficient Building Envelope lb <br />1.0 <br />1 c <br />Efficient Building Envelope 1 c <br />2.0 <br />1d <br />Efficient Building Envelope ld <br />0.5 <br />2a <br />Air Leakage Control and Efficient Ventilation 2a <br />0.5 <br />2b <br />Air Leakage Control and Efficient Ventilation 2b <br />1.0 <br />2c <br />Air Leakage Control and Efficient Ventilation 2c <br />1.5 <br />3a <br />High Efficiency HVAC 3a <br />1.0 <br />3b <br />High Efficiency HVAC 3b <br />1.0 <br />3c <br />Hi h Efficiency HVAC 3c <br />1.5 <br />3d <br />High Efficiency HVAC 3d <br />1.0 <br />4 <br />High Efficiency HVAC Distribution System <br />1.0 <br />5a <br />Efficient Water Heating 5a <br />0.5 <br />5b <br />Efficient Water Heating 5b <br />1.0 <br />5c <br />Efficient Water Heating 5c <br />1.5 <br />5d <br />JEfficient Water Heating 5d <br />0.5 <br />6 <br />lRenewable Electric Energy <br />0.5 <br />(07101113) <br />a <br />El <br />n <br />0.5 <br />n <br />1.0 <br />l] <br />0.5 <br />El <br />❑x <br />1.5 <br />El <br />* 1200 kwh <br />0.0 <br />Total Credits 3.50 <br />*Please refer to Table R406.2 for complete option descriptions <br />CITY OF EVERETT <br />REVIEWED FOR PERMIT <br />zoo <br />U <br />U <br />IL <br />W <br />W <br />AC <br />V <br />o <br />0 <br />U <br />U <br />U <br />Q <br />} <br />W <br />J <br />Cp <br />mA <br />1- <br />W <br />0) <br />CD <br />rz <br />W <br />W <br />`} <br />p� <br />> <br />LU <br />W <br />CD <br />N <br />N <br />O <br />1" <br />N <br />N <br />V <br />N <br />Q <br />r: <br />00 <br />W� <br />N <br />W <br />Z <br />W <br />Of <br />z <br />V <br />0 <br />U1 <br />NWW <br />U <br />nz <br />oo <br />Q.�Nt <br />7�In <br />m W <br />ti <br />�vCnfl <br />J <br />C;) 00 <br />_ <br />p in <br />O <br />(n <br />LO <br />(I)CN <br />jW(N>_-0 <br />It <br />a <br />a <br />Q <br />W <br />W <br />U) to <br />z <br />_W <br />0 <br />CO <br />00 <br />r� <br />vJ 0 <br />z 0 <br />0(� Q <br />U) <br />3. r 4-j <br />Uo <br />ry N a) <br />W > <br />W <br />Vl <br />O� <br />Lr)o <br />0 <br />= <br />V <br />U <br />Z <br />W <br />W <br />''W^^ <br />V <br />H <br />z <br />0 <br />U <br />I-_ <br />ILL! <br />w <br />S <br />A <br />3/26/2020 <br />s/24/2ozo <br />SHEET: <br />A1.1 <br />