IAQ & ERV eLibrary

In Schools







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ERV & HRV















Codes





Government Agencies





In High-rise Residential







Passive House and Net Zero Energy Homes



Industry Associations








The School Advanced Ventilation Engineering Software (SAVES) package is a tool to help school designers assess the potential financial payback and indoor humidity control benefits of Energy Recovery Ventilation (ERV) systems for school applications.<a href="https://www.epa.gov/iaq-schools/school-advanced-ventilation-engineering-software-saves" target="_blank" rel="noopener noreferrer"><i> Source: United States Environmental Protection Agency</i></a>
In recent years, comparative risk studies performed by the US Environmental Protection Agency(EPA) and its Science Advisory Board (SAB) have consistently ranked indoor air pollution among the top five environmental risks to public health. Good IAQ is an important component of a healthy indoor environment, and can help schools reach their primary goal of educating children.<a href="https://www.epa.gov/iaq-schools/why-indoor-air-quality-important-schools" target="_blank" rel="noopener noreferrer"><i> Source: United States Environmental Protection Agency</i></a>
The article features the following benefits of investing in net zero schools: improving the health of students, faculty and staff, increasing of productivity, innovative education opportunities and energy cost savings.<a href="https://www.greenbiz.com/article/4-reasons-net-zero-energy-should-start-schools"><i> Source: GreenBiz</i></a>
SINPHONIE, an EU-funded research project on indoor air quality in EU schools, and its impact on children’s health. Based on the evidence gathered, the Joint Research Centre and the partners developed guidelines for maintaining good air quality.<a href=""https://www.sciencedaily.com/releases/2015/01/150127104925.htm"><i> Source: ScienceDaily</i></a>
The article describes the indoor quality solutions for the most common home air quality concerns such as toxic dust, mold and bacteria, pollen, household odours, pet dander, volatile organic compound (vocs) and formaldehyde.<a href=""http://thechalkboardmag.com/indoor-air-quality-best-air-filters"><i> Source: The Chalkboard</i></a>
Attic ventilation is an important part of an overall ventilation strategy to make homes more durable and comfortable. Without proper attic ventilation, the home’s HVAC equipment must work harder to maintain the indoor comfort level. Utilizing a properly sized and installed powered attic ventilator (PAV) along with accommodations for adequate make-up air, one can ensure that the hot and humid attic air is exhausted and replaced with the fresh outdoor air. The resulting cooler, drier attic will be less likely to suffer mold and moisture damage.<a href="https://www.hvi.org/publications/attic_ventilation.cfm" target="_blank" rel="noopener noreferrer"><i> Source: Home Ventilating Institute</i></a>
The latest version of ASHRAE 62.2 includes a significant change in the decade-old ventilation formula. Under the new formula, high-performance homes will need to be ventilated at a higher rate, namely 7.5 cfm per person plus 3 cfm per 100 square feet. This means that for a tightly built 2,400-square-foot home with 3 bedrooms, the minimum airflow rate of the ventilation equipment has jumped 89%, from 54 cfm to 102 cfm. <a href="http://www.greenbuildingadvisor.com/blogs/dept/musings/how-much-fresh-air-does-your-home-need" target="_blank" rel="noopener noreferrer"><i> Source: GreenBiz</i></a>
To safeguard public health and promote energy savings and affordability, Florida should<br /> maintain the model building code requirements of 5 air changes per hour at 50 pascals (5 ACH50) for building air tightness verification and mandatory requirements for whole‐house mechanical ventilation <a href="https://www.hvi.org/publications/pdfs/The_Case_for_Mechanical_Ventilation_and_Air_Tightness_Requirements_in_Florida_03012016.pdf" target="_blank" rel="noopener noreferrer"><i> Source: Home Ventilation Institute</i></a>
Improvements in filtration and ventilation in both new and older buildings are equally important to global public health. A study led by University of Illinois researcher Paul Francisco looked at the health of people in 81 low-income houses in the Chicago area before and after installing a ventilation system up to federal standards. Francisco’s team found that six months after installation, children living in the homes reported fewer headaches and respiratory problems, and adults reported significantly less “psychological distress” than previously.<a href=""http://www.newsweek.com/2016/06/10/indoor-air-pollution-revolution-465531.html"><i> Source: Newsweek</i></a>
Study after study has shown that the amount of ventilation, or fresh outdoor air brought inside, is a critical determinant of health. Good ventilation has been shown to reduce sick building syndrome symptoms, cut absenteeism, and even reduce infectious disease transmission.<a href="https://hbr.org/2017/03/research-stale-office-air-is-making-you-less-productive" target="_blank" rel="noopener noreferrer"><i> Source: Harvard Business Review</i></a>
The following HomePower article describes on how the heat recovery ventilator (HRV) and the energy recovery ventilator (ERV) can make a home more efficient. Properly applied, HRV/ERVs are a great way to improve indoor air quality by introducing outside air, while recovering much of the energy in exhaust air. Although there is a higher capital cost compared to simple exhaust fans, the HRV/ERV system will save energy (and money) over the long term, while providing a quieter, healthier indoor environment.<a href="http://www.homepower.com/articles/home-efficiency/equipment-products/heat-energy-recovery-ventilators" target="_blank" rel="noopener noreferrer"><i> Source: HomePower</i></a>
This article explains the difference between an HRV and an ERV and helps you make the right choose. The best option between an HRV and an ERV depends on your climate and specific needs. If your house is too humid in winter (above 60% RH) then an HRV is the better choice, as it would surely get rid of excess humidity. One of the benefits of the ERV that it will lower the load on the air conditioning system, even if it can’t keep up with the high humidity level on the outside.<a href="http://www.ecohome.net/guide/choosing-between-hrv-erv" target="_blank" rel="noopener noreferrer"><i> Source: ECOhome</i></a>
This blog post describes the types of balanced ventilation in which heat is recovered from the outgoing airstream to preheat the incoming fresh air.<a href="http://www.greenbuildingadvisor.com/blogs/dept/energy-solutions/our-top-efficiency-heat-recovery-ventilator" target="_blank" rel="noopener noreferrer"> Source: GreenBuildingAdvisor</a>
This article describes the benefits of an Energy recovery ventilator system (ERV) over a Heat recovery ventilator (HRV). An energy recovery ventilator system (ERV) fits in colder climates, in the homes where there is no excess moisture in heating season, as well as for homes located in warmer climates where the outside humidity level is high. As for the HRV system, the ERV system recovers heat; however, it also recuperates the energy trapped in moisture, which greatly improves the overall recovery efficiency.<a href="https://www.venmar.ca/22-detail-advice-hrv-and-erv-why-choose-a-erv-energy-recovery-ventilator-.html" target="_blank" rel="noopener noreferrer"><i> Source: Venmar</i></a>
The goal of this article is to raise awareness about IAQ and how your life may depend on good air. It describes how the Energy recovery ventilators (ERVs) help improve IAQ and reduce energy consumption. According to a report from Navigant Research mentioned in the article, the ERVs are among the fastest growing segments of improved IAQ management in buildings. It also includes suggestions from HVAC contractors how to upsell ventilation systems to customers. <a target="_blank" rel="noopener noreferrer"><i> Source: theNEWS</i></a>
The article cited a recent example of adding a fixed-plate heat exchanger to the make-up air (MUA) unit to pressurize the structure, RTM’s (RTM Engineering Consultants) design allowed for the recovery of heat being exhausted from the building to the incoming fresh air stream. This is an ideal application as the MUA is 100% fresh air, which means the temperature difference between the exhaust air stream and the incoming fresh air stream is at its maximum. <a href="http://www.csemag.com/single-article/using-energy-recovery-systems-to-increase-building-efficiency/b8155b152d2cca8963e673b2162b3c48.html" target="_blank" rel="noopener noreferrer"><i> Source: Consulting-Specifying Engineer</i></a>
The study monitored eight ERVs installed in Fairbanks, Alaska to determine if flat plate energy exchangers could perform in cold climates without frosting failure. All eight units performed adequately over the course of the 2013-2014 winter. <a href="http://www.cchrc.org/sites/default/files/ERV_ColdClimates.pdf" target="_blank" rel="noopener noreferrer"><i> Source: Cold Climate Housing Research Center</i></a>
Field studies have shown that the use of an ERV has a favorable impact on the RH control.<br /> In warm and humid season, the use of an ERV to exhaust air from bathrooms leads to lower indoor RH when used with an A/C system. In wintertime, the use of ERV to ventilate helps prevent drying the indoor air any further.<a href="http://nparc.nrc-cnrc.gc.ca/eng/view/accepted/?id=b2d7a357-f6e0-407f-864f-e21a4f01955c" target="_blank" rel="noopener noreferrer"><i> Source: National Research Council Canada</i></a><br />
The updated State Energy Code Adoption provides a greater level of accuracy and replaces the previous approach, which was comprised of a simpler qualitative review of state code titles and provisions.<a href="https://www.energycodes.gov/status-state-energy-code-adoption" target="_blank" rel="noopener noreferrer"><i> Source: Energy Efficiency and Renewable Energy</i></a>
The 2016 edition includes a major change to the scope of the standard by which residential occupancies are moved from Standard 62.1 to Standard 62.2. <a href="https://www.ashrae.org/resources--publications/bookstore/standards-62-1--62-2" target="_blank" rel="noopener noreferrer"><i> Source: ASHRAE</i></a>
Standard 90.1 has been a benchmark for commercial building energy codes in the United States and a key basis for codes and standards around the world for more than 35 years.<a href="https://www.ashrae.org/resources--publications/bookstore/standard-90-1" target="_blank" rel="noopener noreferrer"><i> Source: ASHRAE</i></a>
This report presents the Building America Research-to-Market Plan (Plan), including the integrated Building America Technology-to-Market Roadmaps (Roadmaps) <a href="https://energy.gov/sites/prod/files/2015/11/f27/Building%20America%20Research%20to%20Market%20Plan-111715.pdf" target="_blank" rel="noopener noreferrer"><i> Source: Office of Energy Efficiency and Renewable Energy U.S. Department of Energy</i></a>
Indoor Air Quality (IAQ) refers to the air quality within and around buildings and structures, especially as it relates to the health and comfort of building occupants. Understanding and controlling common pollutants indoors can help reduce your risk of indoor health concerns.<a target="_blank" rel="noopener noreferrer"><i> Source: The United States Environmental Protection Agency </i></a>
Indoor airPLUS is a voluntary partnership and labeling program that helps new home builders improve the quality of indoor air by requiring construction practices and product specifications that minimize exposure to airborne pollutants and contaminants. Clean air is good for everyone’s health, but it can be especially important to those that have chronic respiratory conditions. <a target="_blank" rel="noopener noreferrer"><i> Source: The United States Environmental Protection Agency </i></a>
This guide helps designers, developers, builders, contractors, and owners gain a better understanding of heat recovery ventilators (HRVs) and energy recovery ventilators (ERVs) and how they can support healthy and comfortable indoor living environments in multi-unit residential buildings. It consolidates best practices for the design, installation and maintenance of these systems.<a href="https://www.bchousing.org/research-centre/library/residential-design-construction/heat-recovery-ventilation-guide-murbs" target="_blank" rel="noopener noreferrer"><i> Source: BC Housing</i></a>
The presentation covers the topics such as history, compartmentalization as a solution, case studies of buildings using balanced in-suite ventilation with exhaust air heat recovery<a href="http://www.ashrae.ottawa.on.ca/ashrae-ovc_history/2013-2014/Meetings/201404/2014-04-15%20MURBs%20Energy%20Performance%20and%20Ventilation%20-%20ASHRAE.PDF" target="_blank" rel="noopener noreferrer"><i> Source: The American Society of Heating, Refrigeration and Air-Conditioning Engineers</i></a>
A comprehensive technical library from the RDH Building Science Laboratories provides a range of documents, presentations, conference papers and examples of R&D, standard and custom testing of materials, components, and assemblies.<a href="https://buildingsciencelabs.com/technical-library/ " target="_blank" rel="noopener noreferrer"><i> Source: RDH Building Science Laboratories</i></a>
This guide will assist designers, developers, builders, contractors and owners with the design, installation and operation of heat and energy recovery ventilation (HRV and ERV) systems in<br /> multi-unit residential buildings (MURBs) throughout Canada. <a href="https://www.cmhc-schl.gc.ca/en/inpr/su/hirimu/upload/hrv-erv-guide-multi-unit-residential-buildings.pdf" target="_blank" rel="noopener noreferrer"><i> Source: Canada Mortgage and Housing Corporation</i></a>
Requirements and testing procedures for energetic and acoustical assessment of Passive House ventilation systems for certification as “Passive House suitable component”<a href="http://www.passiv.de/downloads/03_Reqs_and_testing_procedures_ventilation_en.pdf" target="_blank" rel="noopener noreferrer"><i> Source: Passivhaus Institut</i></a>
Requirements and testing procedures for energetic and acoustical assessment of Passive House ventilation systems for certification as “Passive House suitable component”. Supplementary Sheet Moisture Recovery for ventilation units. <a href="http://passiv.de/downloads/03_supplementary_sheet_ventilation_en.pdf" target="_blank" rel="noopener noreferrer"><br /> <i> Source: Passivhaus Institut</i></a>
Founded in 1955, HVI certifies a wide range of home ventilating products manufactured by companies located throughout the world which produce the vast majority of the residential ventilation products sold in North America.<a href="https://www.hvi.org/" target="_blank" rel="noopener noreferrer"><i> Source: Home Ventilating Institute</i></a>
A source of performance certified heating, ventilation, air-conditioning and commercial equipment and components.<a href="https://www.ahridirectory.org/Search/SearchHome?ReturnUrl=%2f" target="_blank" rel="noopener noreferrer"><i> Source: The Air-Conditioning, Heating, and Refrigeration Institute</i></a>
The certification program includes Air-to-Air Heat Exchangers for use in Air-to-Air Energy Recovery Ventilation Equipment, rated at or above 50 scfm but below or equal to 5,000 scfm at AHRI Standard Rating Conditions.<a href="http://www.ahrinet.org/ERVcertification" target="_blank" rel="noopener noreferrer"><i> Source: The Air-Conditioning, Heating, and Refrigeration Institute</i></a>