[{"command":"settings","settings":{"basePath":"\/","pathPrefix":"","setHasJsCookie":0,"ajaxPageState":{"theme":"iaqa_u","theme_token":"xtTPi9PQgQ3ewf_UGM7mQi0ojewCiR9a54RV-NmCQJ4","jquery_version":"1.10"},"CToolsModal":{"loadingText":"Loading...","closeText":"Close Window","closeImage":"\u003Cimg typeof=\u0022foaf:Image\u0022 class=\u0022img-responsive\u0022 src=\u0022https:\/\/university.iaqa.org\/sites\/all\/modules\/contrib\/ctools\/images\/icon-close-window.png\u0022 alt=\u0022Close window\u0022 title=\u0022Close window\u0022 \/\u003E","throbber":"\u003Cimg typeof=\u0022foaf:Image\u0022 class=\u0022img-responsive\u0022 src=\u0022https:\/\/university.iaqa.org\/sites\/all\/modules\/contrib\/ctools\/images\/throbber.gif\u0022 alt=\u0022Loading\u0022 title=\u0022Loading...\u0022 \/\u003E"},"edu-modal-style":{"modalSize":{"type":"fixed","width":"auto","addHeight":700,"height":"auto"},"modalOptions":{"background-color":"black"},"closeText":"\u003Ci class=\u0022fa fa-times-circle\u0022 title=\u0022Close\u0022\u003E\u003C\/i\u003E","loadingText":"","modalTheme":"edu_modal_theme","animation":"fadeIn","animationSpeed":"medium","throbberTheme":"edu_modal_throbber"},"better_exposed_filters":{"views":{"course_modal":{"displays":{"block":{"filters":[]}}}}}},"merge":true},{"command":"modal_display","title":"Optimizing Ventilation to Achieve the Highest Indoor Air Quality","output":"\u003Cdiv class=\u0022view view-course-modal view-id-course_modal view-display-id-block view-dom-id-4397e22e9c0b60f19fca89d0583b1aee\u0022\u003E\n \n \n \n \u003Cdiv class=\u0022view-content\u0022\u003E\n \u003Cdiv class=\u0022views-row views-row-1 views-row-odd views-row-first views-row-last\u0022\u003E\n \n \u003Cdiv class=\u0022views-field views-field-field-edu-body\u0022\u003E \u003Cdiv class=\u0022field-content\u0022\u003E\u003Cp\u003EPresenter Bio: Bill Huang\u003C\/p\u003E\n\u003Cp\u003EBill Huang is the Service and Technical Manager for BROAD U.S.A., responsible for customer service and training. Mr. Huang has worked in the BROAD Group for 18 years. His career has spanned product design and production, HVAC system design and control, product installation and advanced troubleshooting, and project management and implementation. Mr. Huang is a specialist in building retrofit and strategies to optimize energy use.\u003C\/p\u003E\n\u003Cp\u003EPresentation Description:\u003C\/p\u003E\n\u003Cp\u003EFor decades, the indoor air distribution convention in the U.S. has been a hybrid outdoor air and return air, most typically a \u201c30\/70\u201d formula:\u00a0 30% fresh air and 70% return or recycled air. \u00a0\u00a0This is how the majority of Air Handler Units (AHU) in service today operate. However, the Covid-19 pandemic along with the \u201csick building syndrome\u201d observed for many years has necessitated a re-think on the best way to achieve healthy building ventilation.\u00a0 How do we make buildings safe and healthy, and reduce risk to owners and occupants?\u00a0\u00a0\u00a0\u003C\/p\u003E\n\u003Cp\u003E100% outdoor fresh air ventilation is the best way to reduce the spread of pathogens, and to best protect the health of the building occupants.\u00a0 Indoor air quality as measured in PM2.5 and CO\u2082 levels is an indicator of overall indoor air quality, and the higher the CO\u2082 level, the more hospitable the indoor environment is for pathogen proliferation.\u00a0 In addition, a recent study on the associations between exposure to PM2.5 and carbon dioxide indoors and cognitive function in office workers found that lower PM2 levels from higher ventilation not only reduced disease transmission, but also resulted in improved cognitive function among the workers and students in the study. The study concluded that enhanced filtration and higher ventilation rates are important health strategies that can improve employee performance.\u003C\/p\u003E\n\u003Cp\u003EIn 2008 the BROAD Group invented a \u201cFresh Air Machine\u201d which was the forerunner of the Energy Recovery Ventilation (ERV) system.\u00a0 An ERV can either work in tandem with a Central Air Conditioning system and use the same ductwork, or it can be a smaller stand-alone system for a more limited space.\u00a0 The ERV works by bringing in 100% fresh air from the outside, and filtering the air before delivering it to the indoor space.\u00a0 The BROAD Group ERV applies a three-step filtration process: the incoming air is first channeled through a coarse filter to remove large particles. The air will then flow through an electrostatic precipitator to remove pathogens and neutralize allergens.\u00a0\u00a0 The final step is the HEPA H13 filter, equivalent to above MERV 16, to remove PM2.5 (particulate matter from 2.5 microns to 0.3 microns).\u00a0 \u00a0This multi-layer solution delivers healthy, 100% outdoor into the indoor space. \u00a0\u003C\/p\u003E\n\u003Cp\u003EA polymer energy exchange plate (or wheel in larger units) either warms (or cools depending on the season) the temperature of the incoming air through an air-to-air energy exchange with the exhaust air being vented to the outside.\u00a0 \u00a0This overcomes the limitation of solely opening air dampers for ventilation, which can cause heating\/cooling loads to spike, as well as introduce\u00a0dust and allergens into the indoor space. The ERV overcomes this problem.\u00a0 In one project underway in New York City, BROAD ERV units varying from 59 to 293 CFM will be deployed in individual classrooms in an aging building retrofit project which will not increase cooling or heating loads.\u003C\/p\u003E\n\u003Cp\u003EThe ERV can contribute to improved health of a building\u2019s occupants, and improve the indoor air quality in the spaces we live, work and study in.\u003C\/p\u003E\n\u003Cp\u003E\n\u00a0\u003C\/p\u003E\n\u003C\/div\u003E \u003C\/div\u003E \u003C\/div\u003E\n \u003C\/div\u003E\n \n \n \n \n \n \n\u003C\/div\u003E"}]