ASHRAE 62.2 10:2010 Edition

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ASHRAE Standard 62.2-2010 Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings

Published By	Publication Date	Number of Pages
ASHRAE	2010	20

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4	FOREWORD FOREWORD 1. PURPOSE 1. PURPOSE 2. SCOPE 2. SCOPE 2.1 This standard considers chemical, physical, and biological contaminants that can affect air quality. Thermal comfort requirements are not included in this standard (see ANSI/ ASHRAE Standard 55-2004, Thermal Environmental Conditions for Human Occ… 2.1 This standard considers chemical, physical, and biological contaminants that can affect air quality. Thermal comfort requirements are not included in this standard (see ANSI/ ASHRAE Standard 55-2004, Thermal Environmental Conditions for Human Occ… 2.2 While acceptable IAQ is the goal of this standard, it will not necessarily be achieved even if all requirements are met 2.2 While acceptable IAQ is the goal of this standard, it will not necessarily be achieved even if all requirements are met 2.3 This standard does not address unvented combustion space heaters. 2.3 This standard does not address unvented combustion space heaters.
5	3. DEFINITIONS 3. DEFINITIONS
6	4. WHOLE-BUILDING VENTILATION 4. WHOLE-BUILDING VENTILATION 4.1 Ventilation Rate. A mechanical exhaust system, supply system, or combination thereof shall be installed for each dwelling unit to provide whole-building ventilation with outdoor air each hour at no less than the rate specified in Tables 4.1a and … 4.1 Ventilation Rate. A mechanical exhaust system, supply system, or combination thereof shall be installed for each dwelling unit to provide whole-building ventilation with outdoor air each hour at no less than the rate specified in Tables 4.1a and … 4.2 System Type. The whole-house ventilation system shall consist of one or more supply or exhaust fans and associated ducts and controls. Local exhaust fans shall be permitted to be part of a mechanical exhaust system. Outdoor air ducts connected to… 4.2 System Type. The whole-house ventilation system shall consist of one or more supply or exhaust fans and associated ducts and controls. Local exhaust fans shall be permitted to be part of a mechanical exhaust system. Outdoor air ducts connected to… 4.3 Airflow Measurement. The airflow required by this section is the quantity of outdoor ventilation air supplied and/ or indoor air exhausted by the ventilation system as installed and shall be measured using a flow hood, flow grid, or other airflow… 4.3 Airflow Measurement. The airflow required by this section is the quantity of outdoor ventilation air supplied and/ or indoor air exhausted by the ventilation system as installed and shall be measured using a flow hood, flow grid, or other airflow… 4.4 Control and Operation. The “fan on” switch on a heating or air-conditioning system shall be permitted as an operational control for systems introducing ventilation air through a duct to the return side of an HVAC system. Readily accessible ov… 4.4 Control and Operation. The “fan on” switch on a heating or air-conditioning system shall be permitted as an operational control for systems introducing ventilation air through a duct to the return side of an HVAC system. Readily accessible ov…
7	4.5 Delivered Ventilation. The delivered ventilation rate shall be calculated as the larger of the total supply or total exhaust and shall be no less than specified in Section 4.1 during each hour of operation. 4.5 Delivered Ventilation. The delivered ventilation rate shall be calculated as the larger of the total supply or total exhaust and shall be no less than specified in Section 4.1 during each hour of operation. 4.6 Restrictions on System Type. Use of certain ventilation strategies is restricted in specific climates as follows. 4.6 Restrictions on System Type. Use of certain ventilation strategies is restricted in specific climates as follows. 5. LOCAL Exhaust 5. LOCAL Exhaust 5.1 Local Mechanical Exhaust. A local mechanical exhaust system shall be installed in each kitchen and bathroom. Each local ventilation system shall be either one of the following two: 5.1 Local Mechanical Exhaust. A local mechanical exhaust system shall be installed in each kitchen and bathroom. Each local ventilation system shall be either one of the following two: 5.2 Intermittent Local Exhaust. An intermittently operating, local mechanical exhaust system shall be designed to be operated as needed by the occupant. 5.2 Intermittent Local Exhaust. An intermittently operating, local mechanical exhaust system shall be designed to be operated as needed by the occupant. 5.3 Continuous Mechanical Exhaust. A continuously operating mechanical exhaust system shall be installed to operate without occupant intervention. The system may be part of a balanced mechanical system. See Chapter 10 of Guideline 242 for guidance on… 5.3 Continuous Mechanical Exhaust. A continuously operating mechanical exhaust system shall be installed to operate without occupant intervention. The system may be part of a balanced mechanical system. See Chapter 10 of Guideline 242 for guidance on… 5.4 Airflow Measurement. The airflow required by this section is the quantity of indoor air exhausted by the ventilation system as installed and shall be measured using a flow hood, flow grid, or other airflow measuring device. 5.4 Airflow Measurement. The airflow required by this section is the quantity of indoor air exhausted by the ventilation system as installed and shall be measured using a flow hood, flow grid, or other airflow measuring device.
8	6. OTHER REQUIREMENTS 6. OTHER REQUIREMENTS 6.1 Adjacent Spaces. Measures shall be taken to minimize air movement across envelope components separating dwelling units, and to dwelling units from garages, unconditioned crawl spaces, and unconditioned attics. 6.1 Adjacent Spaces. Measures shall be taken to minimize air movement across envelope components separating dwelling units, and to dwelling units from garages, unconditioned crawl spaces, and unconditioned attics. 6.2 Instructions and Labeling. Information on the ventilation design and/or ventilation systems installed, instructions on their proper operation to meet the requirements of this standard, and instructions detailing any required maintenance (similar … 6.2 Instructions and Labeling. Information on the ventilation design and/or ventilation systems installed, instructions on their proper operation to meet the requirements of this standard, and instructions detailing any required maintenance (similar … 6.3 Clothes Dryers. Clothes dryers shall be exhausted directly to the outdoors. 6.3 Clothes Dryers. Clothes dryers shall be exhausted directly to the outdoors. 6.4 Combustion and Solid-Fuel Burning Appliances. Combustion and solid-fuel burning appliances must be provided with adequate combustion and ventilation air and vented in accordance with manufacturers’ installation instructions, NFPA 54/ANSI Z223.1… 6.4 Combustion and Solid-Fuel Burning Appliances. Combustion and solid-fuel burning appliances must be provided with adequate combustion and ventilation air and vented in accordance with manufacturers’ installation instructions, NFPA 54/ANSI Z223.1…
9	6.5 Airtightness Requirements 6.5 Airtightness Requirements 6.6 Ventilation Opening Area. Spaces shall have ventilation openings as listed below. Such openings shall meet the requirements of Section 6.8. 6.6 Ventilation Opening Area. Spaces shall have ventilation openings as listed below. Such openings shall meet the requirements of Section 6.8. 6.7 Minimum Filtration. Mechanical systems that supply air to an occupiable space through ductwork exceeding 10 ft (3 m) in length and through a thermal conditioning component, except evaporative coolers, shall be provided with a filter having a desi… 6.7 Minimum Filtration. Mechanical systems that supply air to an occupiable space through ductwork exceeding 10 ft (3 m) in length and through a thermal conditioning component, except evaporative coolers, shall be provided with a filter having a desi… 6.8 Air Inlets. Air inlets that are part of the ventilation design shall be located a minimum of 10 ft (3 m) from known sources of contamination such as a stack, vent, exhaust hood, or vehicle exhaust. The intake shall be placed so that entering air … 6.8 Air Inlets. Air inlets that are part of the ventilation design shall be located a minimum of 10 ft (3 m) from known sources of contamination such as a stack, vent, exhaust hood, or vehicle exhaust. The intake shall be placed so that entering air … 7. Air-Moving Equipment 7. Air-Moving Equipment 7.1 Selection and Installation. Ventilation devices and equipment shall be tested in accordance with ANSI/ASHRAE Standard 51/AMCA 210, Laboratory Methods of Testing Fans for Aerodynamic Performance Rating9 and ANSI/AMCA Standard 300, Reverberant Room… 7.1 Selection and Installation. Ventilation devices and equipment shall be tested in accordance with ANSI/ASHRAE Standard 51/AMCA 210, Laboratory Methods of Testing Fans for Aerodynamic Performance Rating9 and ANSI/AMCA Standard 300, Reverberant Room… 7.2 Sound Ratings for Fans. Ventilation fans shall be rated for sound at no less than the minimum airflow rate required by this standard, as noted below. 7.2 Sound Ratings for Fans. Ventilation fans shall be rated for sound at no less than the minimum airflow rate required by this standard, as noted below.
10	7.3 Multibranch Exhaust Ducting. If more than one of the exhaust fans in a dwelling unit shares a common exhaust duct, each fan shall be equipped with a back-draft damper to prevent the recirculation of exhaust air from one room to another through th… 7.3 Multibranch Exhaust Ducting. If more than one of the exhaust fans in a dwelling unit shares a common exhaust duct, each fan shall be equipped with a back-draft damper to prevent the recirculation of exhaust air from one room to another through th… 8. Climate Data 8. Climate Data
13	9. REFERENCES 9. REFERENCES NORMATIVE APPENDIX A— EXISTING BUILDINGS NORMATIVE APPENDIX A— EXISTING BUILDINGS A1. SUMMARY A1. SUMMARY A2. WHOLE-BUILDING MECHANICAL VENTILATION RATE A2. WHOLE-BUILDING MECHANICAL VENTILATION RATE A3. LOCAL EXHAUST A3. LOCAL EXHAUST A3.1 Initial Room Airflow Deficit. The airflow deficit for each bathroom or kitchen is the required airflow from Table 5.1 less the airflow rating from Section A4.2 of the exhaust equipment. If there is no exhaust device or if the existing device can… A3.1 Initial Room Airflow Deficit. The airflow deficit for each bathroom or kitchen is the required airflow from Table 5.1 less the airflow rating from Section A4.2 of the exhaust equipment. If there is no exhaust device or if the existing device can… A3.2 Window Opening Credit. If the authority having jurisdiction determines that window operation is a locally permissible method of providing local exhaust, the deficit may be reduced as follows: if there is an operable window in the room, the airfl… A3.2 Window Opening Credit. If the authority having jurisdiction determines that window operation is a locally permissible method of providing local exhaust, the deficit may be reduced as follows: if there is an operable window in the room, the airfl… A3.3 Required Additional Airflow. The total airflow deficit is the sum of all the final airflow deficits from all bathrooms and kitchens. The required additional airflow is equal to one-quarter of the total airflow deficit. A3.3 Required Additional Airflow. The total airflow deficit is the sum of all the final airflow deficits from all bathrooms and kitchens. The required additional airflow is equal to one-quarter of the total airflow deficit. A4. AIR-MOVING EQUIPMENT A4. AIR-MOVING EQUIPMENT
14	A4.1 Selection, Installation, and Sound Rating. Sections 7.1 and 7.2 are not applicable to existing local exhaust fans being retained via the alternate compliance path of this appendix. A4.1 Selection, Installation, and Sound Rating. Sections 7.1 and 7.2 are not applicable to existing local exhaust fans being retained via the alternate compliance path of this appendix. A4.2 Airflow Rating. If airflow ratings do not exist or the duct sizing requirements of Section 5.4 cannot be verified, the airflow rate shall be measured and the alternative procedure of Section 5.4 using the airflow rating at 0.25 in. w.c. (62.5 Pa… A4.2 Airflow Rating. If airflow ratings do not exist or the duct sizing requirements of Section 5.4 cannot be verified, the airflow rate shall be measured and the alternative procedure of Section 5.4 using the airflow rating at 0.25 in. w.c. (62.5 Pa… INFORMATIVE APPENDIX b ADDENDA DESCRIPTION INFORMATION INFORMATIVE APPENDIX b ADDENDA DESCRIPTION INFORMATION

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Standard Title	ASHRAE Standard 62.2-2010 Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings
Published Code	ASHRAE
Publication Date	2010
Pages Count	20

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