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ES+H Multifamily Building Upgrades_508c_02 09 2016

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54 Energy Savings Plus Health | INDOOR AIR QUALITY GUIDELINES FOR MULTIFAMILY BUILDING UPGRADES PRIORITY ISSUE 20.0 NATURAL (NOT FAN-POWERED) VENTILATION ASSESSMENT PROTOCOLS (AP) MINIMUM ACTIONS (MA) EXPANDED ACTIONS (EA) AP 20.1 Determine Whether Dwelling Units Are Served By Natural Ventilation (Not Fan-Powered) Systems Natural ventilation is a configuration where outdoor air ventilation is provided to dwelling units without using mechanical fans, and includes passive rooftop hoods, passive exhaust shafts and exhaust grilles that serve one or more dwelling units. For other dwelling unit ventilation configurations, refer to Priority Issue 18.0 Mechanical Ventilation for Individual Dwelling Units or Priority Issue 19.0 Mechanical Ventilation for Multiple Dwelling Units Using Central Exhaust. AP 20.2 Determine Whether ASHRAE Standard 62.2-2013 Mechanical Ventilation Exceptions Are Met Determine whether the dwelling units and/or building meet the exceptions to the whole-building mechanical ventilation requirement in ASHRAE Standard 62.2-2013, Section 4.1.1. AP 20.3 Determine Whether Common Corridors and Nonresidential Spaces Meet Ventilation Requirements Determine the amount of outdoor air ventilation provided to common corridors and whether this meets the ASHRAE Standard 62.1-2013 minimum requirement of 0.06 cfm per square foot of floor area. If nonresidential spaces (e.g., exercise rooms, lobbies, mailrooms, and commercial/retail spaces) are included in the scope of service, determine whether the ventilation in these spaces meets the requirements of ASHRAE Standard 62.1-2013. AP 20.4 Identify and Assess Openings for Outdoor Air Ventilation Identify the location of openings for outdoor air ventilation and assess their distances from outdoor pollutant sources (e.g., vehicle exhaust, plumbing vents, exhaust discharges). MA 20.1 Repair and Upgrade Natural Ventilation Systems As Needed If the dwelling unit is served by natural ventilation and does not meet the exceptions to the whole-building mechanical ventilation requirement in ASHRAE Standard 62.2-2013, Section 4.1.1, or does not perform as intended, convert the natural ventilation system to a fan-powered system: • In dwelling units that have no fan- powered space conditioning systems, install a low-noise (1 sone or less) exhaust fan ducted directly to the outdoors for each bathroom and kitchen. Ensure that each exhaust fan meets the local exhaust (e.g., kitchen or bath) requirements of ASHRAE Standard 62.2-2013 and at least one exhaust fan (or a system including multiple fans) meets ASHRAE Standard 62.2-2013 requirements for whole-building ventilation (per the Standard's Appendix A and Section 8). • In dwelling units equipped with fan-powered air handlers for space conditioning equipment, where possible: o Provide ducted, filtered outdoor air to the return side of the HVAC unit and install a timer to ensure the operating schedule and outdoor air ventilation rate meet ASHRAE Standard 62.2- 2013 intermittent ventilation requirements. The system shall be capable of providing the required ventilation regardless of the heating or cooling demand in the dwelling unit. o Install a low-noise (1 sone or less) exhaust fan ducted directly to the outdoors in each bathroom and kitchen, meeting the requirements of ASHRAE Standard 62.2-2013. If providing central fan-powered mechanical exhaust ventilation systems as part of the building upgrade, refer to Priority Issue 19.0 Mechanical Ventilation for Multiple Dwelling Units Using Central Exhaust. EA 20.1 Include Requirements for Advanced Passive Ventilation Systems If a passive ventilation system is desired in lieu of a mechanical system, the passive system must be designed and approved by a licensed engineer taking into account expected stack effect, wind, and local terrain and shielding. Implement all air sealing measures described in Minimum Action 19.1 and Expanded Action 19.1 for the central ventilation shaft(s) to ensure airflow is from the dwelling units and not from shaft leakage. The ventilation rate for each dwelling unit must be sufficient to achieve the goal of an ASHRAE Standard 62.2- 2013 mechanical ventilation rate, specifically that the annual average ventilation rate shall not be less than if a mechanical system had been installed in accordance with ASHRAE Standard 62.2-2013. EA 20.2 Meet Outdoor Air Filtration and Air-Cleaning Requirements of ASHRAE Standard 189.1, As Applicable to Nonresidential Spaces If nonresidential spaces are included in the scope of service, in geographic locations where the outdoor air exceeds the national standards for particulate matter (PM 2.5 , PM 10 ) or ozone, ensure that the outdoor air filtration and air-cleaning requirements of ASHRAE Standard 189.1-2014, Section 8.3.1.3 are met for mechanical ventilation systems: • Particulate-matter filters or air- cleaning devices with a MERV of at least 8 shall be used in areas where the National Ambient Air Quality Standard for PM 10 is exceeded. • Particulate-matter filters or air- cleaning devices with a MERV of at least 13 shall be used in areas where the National Ambient Air Quality Standard for PM 2.5 is exceeded. Appendix B: Property Management and Occupant Education

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