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<br /> TABLE M 15 0 • .3.3( ) d®sign I dra tlnq I wnsulting
<br /> CONTINUOUS WHOLE-HOUSE MECHANICAL VENTILATION SYSTEM AIRFLOW RATE REQUIREMENTS # ` ..- T'
<br /> DWELLING UNIT NUMBER OF BEDROOMS
<br /> CONTINUOUS WHOLE HOUSE VENTILATION
<br /> FLOOR AREA 0-1 2-3 4-5 6-7 8-9
<br /> (square feet) Airflow in CFM AIR FLOW IN CFM's(CONTINUOUS)
<br /> SQUARE FOOTAGE of BEDROOMS PER 2012 IRC TABLE M1507.3.3(1)
<br /> • <1,500 30 45 60 75 90
<br /> 4429 SqFt 6 90 CFM
<br /> 1,501 -3,000 45 60 75 90 105 —
<br /> 3,001-4,500 60 75 90 105 120 INTERMITTENT WHOLE HOUSE VENTILATION
<br /> 4,501-6,000 75 90 105 120 135 FACTOR AIR FLOW IN CFM's(CONTINUOUS) INTERMITTENT WHF SIZE
<br /> PER 2015 IRC TABLE M1507.3.3(1) PER 2015 IRC TABLE M1507.3.3(1)&(2)
<br /> 6,001 -7,500 90 105 120 135 150
<br /> >7,501 105 120 135 150 165 4
<br /> 30 CFM 120 CFM
<br /> (25%RUN TIME/4hr SEGMENT)
<br /> For SI:1 square foot=0.0929 m2,1 cubic foot per minute=0.0004719 mils. 3
<br /> (33%RUN TIME/4hr SEGMENT) 30 CFM 90 CFM
<br /> TABLE M 1507.3.3(2) 2 0
<br /> — INTERMITTENT WHOLE-HOUSE MECHANICAL VENTILATION RATEFACTORS (a, b) (50%RUN TIME/4hr SEGMENT) 30 CFM 60 CFM
<br /> RUN-TIME PERCENTAGE IN EACH 4-HOUR SEGMENT 25% 33% 50% 66% 75% 100%
<br /> Factor(a) 4 3 2 1 1 1 WHOLE HOUSE MECHANICAL VENTILATION SYSTEM
<br /> (a)For ventilation system run time values between those given,the factors are permitted to be determined by interpolation. , TWO T V ian
<br /> (b)Extrapolation beyond the table is prohibited • WHOLE-HOUSE MECH. VENT. SYSTEM SHALL BE DESIGNED PER 2015 IRC SEC
<br /> M1507.3.1 THRU M1507.3.3
<br /> • INTERMITTENT SYSTEM SHALL MANUAL CONTROL AND AUTOMATIC CONTROL, ie. —
<br /> 24-HOUR CLOCK TIMER
<br /> • AT TIME OF FINAL INSPECTION AUTOMATIC CONTROL SHALL BE SET TO OPERATE THE
<br /> C WHOLE-HOUSE FAN ACCORDING TO THE SCHEDULE USED TO CALCULATE THE
<br /> WHOLE-HOUSE FAN SIZING P,13 4:1'tlfl( .,
<br /> • INSTALLER TO PROVIDE MANUFAC. INSTALL & OPERATING INSTRUCTIONS AS WELL AS '
<br /> WHOLE-HOUSE VENT. SYSTEM OP. DESCRIPTION 2322 CEDAR STREET
<br /> EVERETT, WASHINGTON
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<br /> M1507.3.4.1 WHOLE-HOUSE VENTILATION FANS.
<br /> Exhaust fans providing whole-house ventilation shall have a flow rating at 0.25 inches water gauge
<br /> as specified in Table M1507.3.3(1). Manufacturers' fan flow ratings shall be determined according to
<br /> HVI 916 or AMCA 210.
<br /> M1507.3.4.4 VENTILATION OPENINGS.
<br /> Each habitable space shall be provided with outdoor air inlets or operable windows with an
<br /> openable area not less than 4 square inches of net free area of opening for each 10 cfm of outdoor —
<br /> air required by Table M1507.3.3(1). Where outdoor air supplies are separated from exhaust points
<br /> by doors, provisions shall be made to ensure air flow by installation of distribution ducts, This drawing is:
<br /> 1.Copyright 2018 MAS Design Studio.
<br /> undercutting doors, installation of grilles, transoms, or similar means. Doors shall be undercut to a 2.The Designees Instrument of Professional Service.
<br /> 3.For use on this project only.Obtain Designers written
<br /> minimum of 1/2 inch above the surface of the finish floor covering, permission for any other use orreproducton.
<br /> g Individual room outdoor air inlets shall: ! ' I . NNN " h 3
<br /> 1. Have controllable and secure openings; MARK DATE 1 DESCRIPTION
<br /> 2. Be sleeved or otherwise designed so as not to compromise the thermal properties of the wall - 1 OWNER APPROVAL
<br /> or window in which they are placed; 1 PERMIT APPLICATION g
<br /> 3. Anyinlet or combination of inlets whichprovide 10 cfm at '10 Pascals are deemed equivalent to - 1 BIDDING
<br /> q - 1 CONSTRUCTION
<br /> 4 square inches net free area. - - .
<br /> Ventilation opening shall be screened or otherwise protected from entry by leaves or other material. - 1 -
<br /> Openings shall be controllable, securable and shall be designed to not compromise the thermal - I -
<br /> properties of the building envelope. Ventilation openings shall be located so as not to take air from - I -
<br /> the following areas: _
<br /> 1. Closer than 10 feet from an appliance vent outlet, unless such vent outlet is 3 feet above the
<br /> r , _
<br /> outdoor air inlet. PROJECT NUMBER: 18.02
<br /> 2. Where it will pick up objectionable odors, PROJECT fumes or flammable vapors. APPROVED BY:
<br /> DIRE
<br /> ECTOR:
<br /> 3. A hazardous or unsanitary location. PROJECT ARCHITECT:
<br /> ' 4. A room or space havinganyfuel-burningappliances therein. CHECKED BY:
<br /> p pp JOB CAPTAIN:
<br /> • 5. Closer than 10 feet from a vent opening of a plumbing drainage system unless the vent DRAWN BY: I MAS
<br /> opening is at least 3 feet above the air inlet. s., - P1MT . k` . ' 3 .
<br /> 6. Attic, crawl spaces, or garages.
<br /> A 7. Asphalt roofs unless it is shown that no other location is permissible. In such cases the inlet
<br /> opening shall be located a minimum of 2 feet from the nearest surface of the asphalt roofing, Whole House A
<br /> measured from the intake opening. Ventilation
<br /> CITY OF EVERETT 0, 1, 11 Tix,� ,-
<br /> VIEWS PERMIT
<br /> q �l?-4116141.19a
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