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<br />TABLE R402.1.1
<br />INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT
<br />CLIMATE ZONE
<br />5 AND MARINE 4
<br />FENESTRATION U-FACTOR
<br />0.30
<br />SKYLIGHT U-FACTOR
<br />0.50
<br />CEILING R-VALUE
<br />49
<br />WOOD FRAME WALL R-VALUE
<br />21 int
<br />FLOOR R-VALUE
<br />30
<br />BELOW -GRADE WALL R-VALUE
<br />10/15/21 int + TB
<br />SLAB R-VALUE & DEPTH
<br />10, 2 ft
<br />WHOLE HOUSE MECHANICAL VENTILATION SYSTEM
<br />(CHECK THE BOX ADJACENT TO THE WHOLE HOUSE VENTILATION SYSTEM CHOSEN)
<br />Effective July 1, 2016
<br />M1507.3 Whole -house mechanical ventilation system. Whole house mechanical ventilation systems shall be designed in accordance with
<br />Sections M1507.3.1 through M1507.3.7.
<br />M1507.3.1 System design. Each dwelling unit or guestroom shall be equipped with a ventilation system complying with Section M1507.3.4,
<br />M1507.3.5, M1507.3.6 or M1507.3.7. Compliance is also permitted to be demonstrated through compliance with the International Mechanical
<br />Code.
<br />M1507.3.2 Control and operation.
<br />1. Location of controls. Controls for all ventilation systems shall be readily accessible by the occupant.
<br />2. Instructions. Operating instructions for whole -house ventilation systems shall be provided to the occupant by the installer of the system.
<br />3. Local exhaust systems. Local exhaust systems shall be controlled by manual switches, dehumidistats, timers, or other approved means.
<br />4. Continuous whole -house ventilation systems. Continuous whole -house ventilation systems shall operate continuously. Exhaust fans,
<br />forced -air system fans, or supply fans shall be equipped with "fan on" as override controls. Controls shall be capable of operating the
<br />ventilation system without energizing other energy -consuming appliances. A label shall be affixed to the controls that reads "Whole House
<br />Ventilation (see operating instructions)."
<br />5. Intermittent whole -house ventilation systems. Intermittent whole -house ventilation systems shall comply with the following:
<br />5.1. They shall be capable of operating intermittently and continuously.
<br />5.2. They shall have controls capable of operating the exhaust fans, forced -air system fans, or supply fans without energizing other
<br />energy -consuming appliances.
<br />5.3. The ventilation rate shall be adjusted according to the exception in Section 403.8.5.1.
<br />5.4. The system shall be designed so that it can operate automatically based on the type of control timer installed.
<br />5.5. The intermittent mechanical ventilation system shall operate at least one hour out of every four.
<br />5.6. The system shall have a manual control and automatic control, such as a 24-hour clock timer.
<br />5.7. At the time of final inspection, the automatic control shall be set to operate the whole -house fan according to the schedule used to
<br />calculate the whole -house fan sizing.
<br />5.8. A label shall be affixed to the control that reads "Whole House Ventilation (see operating instructions)."
<br />M1507.3.2.1 Operating instructions. Installers shall provide the manufacturer's installation, operating instructions, and a whole -house
<br />ventilation system operation description.
<br />M1507.3.3 Mechanical ventilation rate. The whole -house mechanical ventilation system shall provide outdoor air to each habitable space at a
<br />continuous rate of not less than that determined in accordance with Table M1507.3.3(1).
<br />Exception: The whole -house mechanical ventilation system is permitted 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 ventilation rate prescribed in Table M1507.3.3(1) is multiplied by the
<br />factor determined in accordance with Table M1507.3.3(2).
<br />® WHOLE -HOUSE VENTILATION USING EXHAUST FANS
<br />M1507.3.4 Whole -house ventilation using exhaust fans. This section establishes minimum prescriptive requirements for whole -house
<br />ventilation systems using exhaust fans. A system which meets all the requirements of this section shall be deemed to satisfy the
<br />requirements for a whole -house ventilation system.
<br />M1507.3.4.1 Whole -house ventilation fans. 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 HVI 916 or AMCA 210.
<br />M1507.3.4.2 Fan noise. Whole -house fans located 4 feet or less from the interior grille shall have a sone rating of 1.0 or less measured at 0.1
<br />inches water gauge. Manufacturer's noise ratings shall be determined as per HVI 915 (March 2009). Remotely mounted fans shall be
<br />acoustically isolated from the structural elements of the building and from attached duct work using insulated flexible duct or other
<br />approved material.
<br />M1507.3.4.3 Fan controls. The whole -house ventilation fan shall meet the requirements of Section
<br />M 1507.3.2 and M 1507.3.2.1.
<br />M1507.3.4.4 Outdoor air inlets. Outdoor air shall be distributed to each habitable space by individual outdoor air inlets. Where outdoor air
<br />supplies are separated from exhaust points by doors, provisions shall be made to ensure air flow by installation of distribution ducts,
<br />undercutting doors, installation of grilles, transoms, or similar means. Doors shall be undercut to a minimum of 1/2 inch above the surface of
<br />the finish floor covering.
<br />Individual room outdoor air inlets shall:
<br />1. Have controllable and secure openings;
<br />2. Be sleeved or otherwise designed so as not to compromise the thermal properties of the wall or window in which they are placed;
<br />3. Provide not less than 4 square inches of net free area of opening for each habitable space. Any inlet or combination of inlets which provide
<br />10 cfm at 10 Pascals are deemed equivalent to 4 square inches net free area.
<br />Inlets shall be screened or otherwise protected from entry by leaves or other material. Outdoor air inlets shall be located so as not to take
<br />air from the following areas:
<br />1. Closer than 10 feet from an appliance vent outlet, unless such vent outlet is 3 feet above the outdoor air inlet.
<br />2. Where it will pick up objectionable odors, fumes or flammable vapors.
<br />3. A hazardous or unsanitary location.
<br />4. A room or space having any fuel -burning appliances therein.
<br />5. Closer than 10 feet from a vent opening of a plumbing drainage system unless the vent opening is at least 3 feet above the air inlet.
<br />6. Attic, crawl spaces, or garages.
<br />WHOLE -HOUSE VENTILATION INTEGRATED WITH A FORCED -AIR SYSTEM
<br />M1507.3.5 Whole -house ventilation integrated with a forced -air system. This section establishes minimum prescriptive requirements for
<br />whole -house ventilation systems integrated with forced -air ventilation systems. A system which meets all the requirements of this section
<br />shall be deemed to satisfy the requirements for a whole -house ventilation system.
<br />M1507.3.5.1 Integrated whole -house ventilation systems. Integrated whole -house ventilation systems shall provide outdoor air at the rate
<br />calculated using Section M1507.3.3. Integrated forced -air ventilation systems shall distribute outdoor air to each habitable space through
<br />the forced -air system ducts. Integrated forced -air ventilation systems shall have an outdoor air inlet duct connecting a terminal element on
<br />the outside of the building to the return air plenum of the forced -air system, at a point within 4 feet upstream of the air handler. The
<br />outdoor air inlet duct connection to the return air stream shall be located upstream of the forced -air system blower and shall not be
<br />connected directly into a furnace cabinet to prevent thermal shock to the heat exchanger. The system will be equipped with a motorized
<br />damper connected to the automatic ventilation control as specified in Section M1507.3.2. The required flow rate shall be verified by field
<br />testing with a flow hood or a flow measuring station.
<br />M1507.3.5.2 Ventilation duct insulation. All supply ducts in the conditioned space shall be insulated to a minimum of R-4
<br />M1507.3.5.3 Outdoor air inlets. Inlets shall be screened or otherwise protected from entry by leaves or other material. Outdoor air inlets
<br />shall be located so as not to take air from the following areas:
<br />1. Closer than 10 feet from an appliance vent outlet, unless such vent outlet is 3 feet above the outdoor air inlet.
<br />2. Where it will pick up objectionable odors, fumes or flammable vapors.
<br />3. A hazardous or unsanitary location.
<br />4. A room or space having any fuel -burning appliances therein.
<br />5. Closer than 10 feet from a vent opening of a plumbing drainage system unless the vent opening is at least 3 feet above the air inlet.
<br />6. Attic, crawl spaces, or garages.
<br />WHOLE -HOUSE VENTILATION USING A SUPPLY FAN
<br />M1507.3.6 Whole -house ventilation using a supply fan. This section establishes minimum prescriptive requirements for whole -house ventilation
<br />systems using an inline supply fan. A system which meets all the requirements of this section shall be deemed to satisfy the requirements for
<br />a whole -house ventilation system.
<br />M1507.3.6.1 Outdoor air. Supply fan ventilation systems shall distribute outdoor air to each habitable space through the forced -air system
<br />ducts or through dedicated ducts to each habitable space. Supply fans shall have the capacity to provide the amount of outdoor air specified
<br />in Table M1507.3.3(1) at 0.40 inches water gauge as per HVI 916. The outdoor air must be filtered before it is delivered to habitable spaces.
<br />The filter may be located at the intake device, in line with the fan, or, in the case of a connection to the return plenum of the air handler,
<br />using the furnace filter. An outdoor air inlet shall be connected to either the supply or return air stream.
<br />M1507.3.6.2 Ducts. An outdoor air inlet duct connection to the supply air stream shall be located downstream of the forced -air system
<br />blower. An outdoor air inlet duct connection to the return air stream shall be located at least 4 feet upstream of the forced -air system
<br />blower and its filter. Neither type of duct shall be connected directly into a furnace cabinet to prevent thermal shock to the heat exchanger.
<br />The outdoor air inlet duct shall be prescriptively sized in accordance with Table M1507.3.6.2. The terminal element on the outside of the
<br />building shall be sized 2 inches in diameter larger than the outdoor air inlet duct.
<br />TABLE M1507.3.6.2
<br />PRESCRIPTIVE SUPPLY FAN DUCT SIZING
<br />Supply Fan Tested CFM at 0.40" w.g.
<br />SPECIFIED
<br />MINIMUM
<br />MINIMUM
<br />VALUE FROM
<br />SMOOTH DUCT
<br />FLEXIBLE DUCT
<br />TABLE
<br />DIAMETER
<br />DIAMETER
<br />M1507.3.3(1)
<br />50-90 cfm
<br />4 inch
<br />5 inch
<br />90-150 cfm
<br />5 inch
<br />6 inch
<br />150-120 cfm
<br />6 inch
<br />7 inch
<br />250-400 cfm
<br />7 inch
<br />8 inch
<br />M1507.3.6.3 Dampers. The system shall be equipped with a back -draft damper and one of the following:
<br />1. A calibrated manual volume damper installed and set to meet the measured flow rates specified in Table M1507.3.3(1) by field testing with
<br />a pressure gauge and/or following manufacturer's installation instructions; or
<br />2. A manual volume damper installed and set to meet the measured flow rates specified in Table
<br />M1507.3.3(1) by field testing with a flow hood or a flow measuring station; or
<br />3. An automatic flow -regulating device sized to the specified flow rates in Table M1507.3.3(1) which provides constant flow over a pressure
<br />range of 0.20 to 0.60 inches water gauge.
<br />M1507.3.6.4 Ventilation duct insulation. All supply ducts in the conditioned space shall be insulated to a minimum of R-4.
<br />M1507.3.6.5 Outdoor air inlets. Inlets shall be screened or otherwise protected from entry by leaves or other material. Outdoor air inlets
<br />shall be located so as not to take air from the following areas:
<br />1. Closer than 10 feet from an appliance vent outlet, unless such vent outlet is 3 feet above the outdoor air inlet.
<br />2. Where it will pick up objectionable odors, fumes or flammable vapors.
<br />3. A hazardous or unsanitary location.
<br />4. A room or space having any fuel -burning appliances therein.
<br />5. Closer than 10 feet from a vent opening of a plumbing drainage system unless the vent opening is at least 3 feet above the air inlet.
<br />6. Attic, crawl spaces, or garages.
<br />❑ WHOLE -HOUSE VENTILATION USING A HEAT RECOVERY VENTILATION SYSTEM
<br />M1507.3.7 Whole -house ventilation using a heat recovery ventilation system. This section establishes minimum prescriptive requirements for
<br />whole -house ventilation using a heat recovery ventilation system.
<br />M1507.3.7.1 Heat recovery ventilation systems. All duct work in heat recovery systems shall be sized and installed per the manufacturer's
<br />instructions. System minimum flow rating shall be not less than that specified in Table M1507.3.3(1). Heat recovery ventilation systems shall
<br />have a filter on the upstream side of the heat exchanger in both the intake and exhaust airstreams with a minimum efficiency rating value
<br />(MERV) of 6.
<br />M1507.3.7.2 Ventilation duct insulation. All supply ducts in the conditioned space installed upstream of the heat exchanger shall be insulated
<br />to a minimum of R-4.
<br />M1507.3.7.3 Outdoor air inlets. Inlets shall be screened or otherwise protected from entry by leaves or other material. Outdoor air inlets
<br />shall be located so as not to take air from the following areas:
<br />1. Closer than 10 feet from an appliance vent outlet, unless such vent outlet is 3 feet above the outdoor air inlet.
<br />2. Where it will pick up objectionable odors, fumes or flammable vapors.
<br />3. A hazardous or unsanitary location.
<br />4. A room or space having any fuel -burning appliances therein.
<br />5. Closer than 10 feet from a vent opening of a plumbing drainage system unless the vent opening is at least 3 feet above the air inlet.
<br />6. Attic, crawl spaces, or garages.
<br />TABLE M1507.3.3(1)
<br />CONTINUOUS WHOLE -HOUSE MECHANICAL VENTILATION SYSTEM AIRFLOW RATE REQUIREMENTS
<br />DWELLING UNIT
<br />NUMBER OF BEDROOMS
<br />FLOOR AREA
<br />(square feet)
<br />0-1
<br />2-3
<br />4-5
<br />6-7
<br />>7
<br />< 1,500
<br />30
<br />45
<br />60
<br />75
<br />90
<br />1,501-3,000
<br />45
<br />60
<br />75
<br />90
<br />105
<br />3,001-4,500 - 1
<br />60
<br />75
<br />90
<br />105
<br />120
<br />4,501-6,000
<br />75
<br />90
<br />105
<br />120
<br />135
<br />6,001-7,500
<br />90
<br />105
<br />120
<br />135
<br />150
<br />> 7,501
<br />105
<br />120
<br />135
<br />150
<br />165
<br />For SI: 1 square foot = 0.029m , 1 cubic foot Oer minute = 0.0004719m/s 3
<br />TABLE M1507.3.3(2)
<br />INTERMITTENT WHOLE -HOUSE MECHANICAL VENTILATION RATE FACTORS a,b
<br />RUN-TIME PERCENTAGE IN
<br />EACH 4-HOUR SEGMENT
<br />25%
<br />33%
<br />1 50%
<br />1 66%
<br />75%
<br />100%
<br />FACTOR a
<br />4
<br />3
<br />1 2
<br />1 1.5
<br />1.3
<br />1.3
<br />a. For ventilation system run time values between those given, the factors are permitted to be determined by interpolation.
<br />b. Extrapolation beyond the table is prohibited.
<br />R406.3 ADDITIONAL ENERGY REQUIREMENTS
<br />SMALLDWELLING UNIT: ...................................................................................................... 3.0
<br />DWELLING UNITS LESS THAN 1500 SQUARE FEET IN CONDITIONED FLOOR AREA WITH
<br />I MCC TU A AI 4nn C V: nE: =_nlf=QTD ATfnnl A Dr - A
<br />CREDIT(S) REQUIRED = 3.0 CREDITS PROVIDED = 3.5
<br />FUEL NORMALIZATION CREDITS FRO TABLE 406.2
<br />SYSTEM
<br />TYPE
<br />DESCRIPTION
<br />CREDITS
<br />FOR HEATING SYSTEM BASED ON ELECTRIC RESISTANCE WITH A DUCTLESS MINI -SPLIT
<br />4
<br />HEAT PUMP SYSTEM IN ACCORDANCE WITH SECTION R403.7.1 INCLUDING THE EXCEPTION.
<br />0.5
<br />ENERGY CREDITS FROM TABLE 406.
<br />OPTION
<br />DESCRIPTION
<br />CREDITS
<br />EFFICIENT BUILDING ENVELOPE
<br />1.3
<br />Prescriptive compliance is based on Table R402.1.1 with the following modifications:
<br />0.5
<br />Vertical fenestration U = 0.28
<br />Floor R-38
<br />V2- k c')
<br />AIR LEAKAGE CONTROL AND EFFICIENT VENTILATION
<br />2.1
<br />COMPLIANCE BASED ON R402.1.2:
<br />0.5
<br />REDUCE THE TESTED AIR LEAKAGE TO 3.0 AIR CHANGES PER HOUR AT 50 PASCALS
<br />AND
<br />ALL WHOLE HOUSE VENTILATION REQUIREMENTS AS DETERMINED BY SECTION M1507.3
<br />OF THE IRC SHALL BE MET WITH A HIGH EFFICIENCY FAN(S) (MAXIMUM 0.35 WATTS/CFM).
<br />HIGH EFFICIENCY HVAC EQUIPMENT OPTION
<br />DUCTLESS MINI -SPLIT HEAT PUMP SYSTEM, ZONAL CONTROL.
<br />3.4
<br />IN HOMES WHERE THE PRIMARY SPACE HEATING SYSTEM IS ZONAL, ELECTRIC HEATING,
<br />1.5
<br />A DUCTLESS MINI -SPLIT HEAT PUMP WITH A MINIMUM HSPF OF 10.0 SHALL BE INSTALLED
<br />AND PROVIDE HEATING TO THE LARGEST ZONE OF THE HOUSING UNIT.
<br />APPLIANCE PACKAGE OPTION
<br />7.1
<br />ALL OF TEH FOLLOWING APPLIANCES SHALL BE NEW AND INSTALLED IN THE DWELLING
<br />UNIT AND SHALL MEET THE FOLLOWING STANDARDS:
<br />0.5
<br />DISHWASHER - ENERGY STAR RATED
<br />REFRIGERATOR (IF PROVIDED) - ENERGY STAR RATED
<br />WASHING MACHINE - ENERGY STAR RATED
<br />DRYER - ENERGY STAR RATED, VENTLESS DRYER WITH A MINIMUM CEF RATING OF 5.2
<br />S
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<br />DRNBY: J.HEILMAN
<br />DATE: MAY 2022
<br />FILENAME: 22-05-02
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