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Basics & Theory

Building Green: 6 Ways To Ventilate A Home
Building Green describes six ways to ventilate a home, and considerations for each one.

CI: Ventilation Equipment Options
Construction Instruction online video describes various ventilation equipment options.

Energy Vanguard: 4 Ventilation Quotes That Will Rock Your IAQ World
Energy Vanguard describes four very interesting ventilation quotes.

Energy Vanguard: Why Airtight Homes Need Mechanical Ventilation
Energy Vanguard discusses why airtight homes need mechanical ventilation, not just the fresh air provided by natural air infiltration.

GBA: Types Of Mechanical Ventilation
Green Building Advisor says options for mechanical ventilation include an exhaust-only system, a central-fan-integrated supply system, an HRV, and an energy-recovery ventilator. It describes the design criteria that each system achieves.

HVAC School: Holy Trinity of IAQ Is Ventilation, Filtration, Humidity Control
HVAC School says the holy trinity of IAQ is ventilation, filtration, and humidity control. These are the three main processes available to technicians and homeowners to improve indoor environmental conditions. Technicians should have a thorough crash-course understanding of each and its importance to indoor air quality.

HVI: Overview On Benefits Of Ventilating
Home Ventilating Institute, a North American association of home ventilation product manufacturers site, has a simple explanation (with drawing) of suggested ventilation options for different parts of a house.

INIVE: Historical View Of Why We Ventilate
INIVE provides article by Nance E. Matson and Max H. Sherman from Lawrence Berkeley National Laboratory which gives a historical view of why we ventilate. (PDF)

IRC: Ventilation For Non Forced-air Houses
Canadian Institute for Research in Construction summary of testing of various types of ventilation systems for use in non-forced air houses.

IRC: Why Houses Need Mechanical Ventilation Systems
Canadian Institute for Research in Construction report with drawings gives a simple explanation of different air leakage problems and different ventilation systems. (PDF)

TECA: Residential Ventilation In BC
Thermal Environmental Comfort Association a BC trade association for the residential heating, cooling and ventilation industry, explains that the BC Building Code contains requirements for the introduction of fresh air into BC residences and the exhaust of stale, moisture-laden air.

US DOE: Why We Ventilate
US DOE online slide show presentation by Dr. Max Sherman from Lawrence Berkeley National Laboratory covers what ventilation is, what IAQ is, functions ventilation provide, how much we need and why, how ventilation standards should be made, and role of ventilation in buildings. (PDF)
Education & Training

TECA: Upcoming BC Courses For Heating Industry
Thermal Environmental Comfort Association of BC offers Quality First training programs for HVAC (forced air and hydronic) contractors. TECA training programs are developed by the industry, for the industry, setting minimum standards for the residential and light commercial heating, ventilating and cooling trades. They provide contractors the information they need to install equipment that operates safely and comfortably at rated efficiencies.
Industry Sectors

RBS: Research On Infiltration, Ventilation & Indoor Air Quality
The Residential Building Systems group (RBS) works on problems associated with whole-building integration involving modeling, measurement, design, and operation. Most of its tasks focus on the movement of air and associated penalties involving distribution of pollutants, energy and fresh air.
Information Sources

AIVC - Resources On Air Infiltration & Ventilation
International Air Infiltration & Ventilation Centre offers industry and research organizations technical support aimed at optimising ventilation technology, as well as a range of services, including comprehensive database on literature standards, and ventilation data.

Building Science: Purchasable 2011 Ventilation Guide
Building Science book 2011 Ventilation Guide presents a variety of recommendations for improving indoor air quality in residential buildings through controlled mechanical ventilation. $20 USD
Issues & Performance

ASHRAE: Guideline 24-2015, Ventilation & Indoor Air Quality In Low-Rise
ASHRAE guideline provides information on how to achieve good indoor air quality (IAQ) that may go beyond minimum requirements. It also provides information relevant to ventilation and IAQ on envelope and system design, material selection, commissioning and installation, and operation and maintenance. This publication applies to ventilation and IAQ for human occupancy in residential buildings that are three stories or fewer in height above grade, including manufactured and modular houses.

ASHRAE: Standard 62.2-2016 Ventilation & Acceptable Indoor Air Quality in Low-Rise Residential Buildings
ASHRAE: Standard 62.2-2016 Ventilation & Acceptable Indoor Air Quality in Low-Rise Residential Buildings defines the roles of and minimum requirements for mechanical and natural ventilation systems and the building envelope intended to provide acceptable indoor air quality in low-rise residential buildings.

BC Gov: New BC Code 9.32 Ventilation Effective December 2014
BC Building and Safety Standards Branch bulletin 9.32. Ventilation describes new BC Building Code requirements for the ventilation of residential dwelling units, such as houses, apartments and secondary suites. These come into effect on December 19, 2014. (PDF)

Building Science: Exhaust-Only Ventilation Does Not Work
Building Science says exhaust-only ventilation does not work in tight building enclosures and certainly not in new houses, apartments, townhouses and row houses.

Building Science: Standard 01-2015 Ventilation For New Low-Rise Residential Buildings
Building Science Corporation Standard 01-2015 Ventilation for New Low-Rise Residential Buildings defines the roles of and minimum requirements for mechanical ventilation systems in new low-rise residential buildings.

Building Science: Ventilation System Effectiveness & Tested Indoor Air Quality Impacts
Building Science study Ventilation System Effectiveness and Tested Indoor Air Quality Impacts added new elements of ventilation effectiveness research, accounting for source of outside air, particle contaminants, and VOC contaminants. These new data give further support for ventilation rate credit for better performing ventilation systems. (PDF)

Building Science: Ventilation System Energy Performance & Cost
Building Science summarizes a study that was conducted to determine the annual difference in energy consumption between various ventilation options in different climates. (PDF)

CAN/CSA-C260-M90 (R2007) Rating Performance of Residential Mechanical Ventilating Equipment
CAN/CSA-C260-M90 (R2007) Rating Performance of Residential Mechanical Ventilating Equipment standard establishes a uniform method to determine air movement characteristics; and to measure sound output of residential mechanical ventilation equipment.

Custom Home Magazine: Updated ASHRAE IAQ Standard Will Ease Home Retrofits
American Society of Heating, Refrigerating, and Air-Conditioning Engineers recently published the 2010 version of its residential ventilation standard. The latest edition, ANSI/ASHRAE Standard 62.2-2010, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings, includes many updates and addenda since the previous version, published in 2007.

Energy Vanguard: Common Problems With Cold Weather Ventilation
Energy Vanguard says if you're experiencing cold-weather ventilation problems, the first step is figuring out where things went wrong. Was it the technology? The design? The installation? Knowing some building science can help a lot as you figure it out.

Energy Vanguard: Update on Residential Ventilation Debate
Energy Vanguard provides an update on what he calls The Great Ventilation Debate, when Joe Lstiburek was battling the ASHRAE 62.2 residential ventilation committee.

GBA: Building Science Corp Ventilation Standard To Compete Against ASHRAE 62.2
Green Building Advisor describes how Building Science Corporation is about to release their own residential ventilation standard to compete against ASHRAE 62.2 for new, code-compliant homes only.

GBA: Interview With Dr Joseph Lstiburek On Ventilation Standards
Green Building Advisor interview with Dr. Joe Lstiburek explains Building Science Corporation new ventilation standard, why tracer gas is a better measure of infiltration than blower doors, and his plans for a ventilation standard for existing homes.

GBA: Ventilation Rates & Human Health
Green Building Advisor says after researching existing data on the correlation between residential ventilation rates and occupant health, they have concluded that healthy-house advocates often overstate the advantages of high ventilation rates. At this point, we just don't have enough data to make health claims for high ventilation rates, and we need more research on this issue.

GBA: Ventilation Requirements For Weatherized Homes
Green Building Advisor discusses whether or not the ASHRAE 62.2 ventilation standard is too complex and expensive for weatherized homes.

Health Vent: Guidelines Of Health Based Ventilation
Health Vent online slide show presentation describes Guidelines of Health Based Ventilation. The objective the Health Vent project is to develop guidelines for health-based ventilation for non-industrial buildings in Europe taking into consideration energy efficiency requirements. (PDF)

HVI: Ventilation Guidelines For Bathrooms
Home Ventilating Institute, a North American association offers guidelines for calculating bathroom ventilation requirements in the US. They may not be adequate to meet your local municipality requirements, but they explain things in a simple manner.

Karg: Past & Future Of Ventilating Dwellings & ASHRAE 6.22-2013
Richard Karg online slide show presentation discusses the past and future of ventilating dwellings and ASHRAE 6.22-2013. (PDF)

LBL: Cost Considerations Of ASHRAE 62.2 Ventilation Standard
Lawrence Berkeley Laboratory study Assessment of Indoor Air Quality Benefits and Energy Costs of Mechanical Ventilation determines the health burden for a subset of pollutants in indoor air and the costs and benefits of ASHRAE's mechanical ventilation standard (62.2) for new California homes. Results indicate that, on a population basis, the health benefits of new home mechanical ventilation justify the energy costs. (PDF)

NRCan: Energy Star Cooling & Ventilating Equipment
Natural Resources Canada provides information and resources on Energy Star standards for cooling and ventilation equipment.

RDH: Ventilation Systems Issues In MURBS
RDH Building Engineering findings show that the standard ventilation systems widely used in multi-unit residential buildings across North America may not be performing as intended.

RESNET: 380-2016 Standard For Testing Air Tightness Of Buildings & HVAC Distribution Systems
RESNET and International Code Council have completed their RESNET/ICC 380-2016 Standard for Testing Air Tightness of Building Enclosures, Air Tightness of Heating and Cooling Air Distribution Systems and Air Flow of Mechanical Ventilation Systems. The national US standard provides a uniform methodology for evaluating the airtightness of building envelopes and heating and cooling air ducts and the air flows of mechanical ventilation systems. These test procedures can be used as building diagnostics, in quality assurance and control, for determining compliance with codes and standards and to determine input to energy simulations and ratings. (PDF)

US DOE: Residential Ventilation Energy Cost & Humidity Control
US Department of Energy report Impact of Residential Mechanical Ventilation on Energy Cost and Humidity Control is based on building energy modeling with an important focus on the energy and indoor humidity impacts of ventilation. (PDF)

US DOE: Ventilation System Effectiveness & Tested IAQ Impacts
US Department of Energy report Ventilation System Effectiveness and Tested Indoor Air Quality Impacts focused on the in-situ impacts of various ventilation systems, including the impacts of differing sources of outside air and the spatial distribution and filtration of ventilation air. (PDF)

ACCA Now: Creative Solutions For Ventilation In New Homes
ACCA Now says ACCA contractors are developing methods that economically meet the ASHRAE 62.2 ventilation requirements for residential applications. The creative solutions reflect the design requirements for specific regions and climates.

ASHRAE: 62.1 Calculation App For iPhone
Developed for Apple's iPhone, iPod touch and iPad, the ASHRAE Standard 62.1 app allows for ventilation rate calculations while in the field. It performs the outdoor air calculations found in the Ventilation Rate Procedure and the interactive 62MZCalc spreadsheets contained in the ASHRAE User's Manual for Standard 62.1, Ventilation for Acceptable Indoor Air Quality. The ASHRAE 62.1 app can also be used to determine 62.1 compliance of simple ventilation systems, as well as more complex ventilation systems and can operate in both IP and metric units.

BC Houising: HRV Guide For Multi-Unit Residential Buildings
BC Houising online Heat Recovery Ventilation Guide for Multi-Unit Residential Buildings consolidates best practices for the design, installation and maintenance of heat recovery ventilation systems in multi-unit residential buildings. (PDF)

Building Science: First Deal With The Manure And Then Don't Suck
Building Science describes ventilation issues and considerations with tight building enclosures where we end up with problems if we don't deal with the obvious.

Building Science: Guide To Designing Ventilation For Good IAQ
Building Science guide Read This Before You Ventilate provides practical recommendations for meeting ventilation requirements including how to build a home enclosure, condition it, ventilate for good indoor air quality, and save energy. (PDF)

Building Science: Industry Discussion On Ventilation Rates
Building Science industry experts online discussion covers what ventilation rates should be for buildings, but realize effective ventilation is not all about the rates.

Building Science: Modifying Airflow Rates To Achieve Equivalent Occupant Exposure
Building Science research report describes a method for modifying ventilation airflow rates to achieve equivalent occupant exposure, and these coefficients can be used to compare the effectiveness of different ventilation systems. (PDF)

Building Science: Mutifamily Ventilation Retrofit Strategies
Building Science Corporation report Multifamily Ventilation Retrofit Strategies describes a series of field tests on ventilation systems they installed in a mid-rise, multifamily affordable housing project that was undergoing a major energy audit and retrofit. (PDF)

Building Science: Need For Ventilation Distribution In Single Family Homes
Building Science study of single family ventilation showed that all ventilation systems benefitted from periodic operation of the central fan, giving excellent uniformity of ventilation air distribution. Systems without central fan recirculation showed poor ventilation air distribution for closed rooms where there was no ventilation system duct.

Building Science: Residential Ventilation Systems
Building Science online slide show presentation describes issues and considerations for various types of residential ventilation systems. (PDF)

Building Science: Slide Presentation On Practical Ventilation Systems
Building Science slide show presents practical approaches to residential ventilation for improved durability and indoor air quality, with examples for different climates. (PDF)

Building Science: Time-Based Scheduling Of Residential Ventilation
Building Science online slide presentation by Armin Rudd describes purposes and practices of residential ventilation and time-based scheduling. (PDF)

Building Science: Top Ten Issues In Residential Ventilation Design
Building Science offers some basic, uncomplicated design guidelines that can go a long way to avoiding most trouble spots in residential ventilation systems.

Building Science: Unintended Ventilation Consequences Suck
Building Science describes causes and issues with excessively high exhaust flow in a tight enclosure.

CMHC: Assessment Of Natural Ventilation For Residential Buildings
CMHC research, analysing homes in Ottawa, Vancouver and Saskatoon, looks at how much natural ventilation is common in Canadian homes, and when supplemental mechanical ventilation might be needed. (PDF)

CMHC: Northern Mechanical Ventilation Equipment Design & Testing
CMHC research highlight Northern Mechanical Ventilation Equipment Design and Testing summarizes the analysis of existing codes or standards and/or currently available or emerging ventilation technologies to see if they are capable of addressing identified concerns. It also discusses the need for a Northern HRV performance specification and includes a draft of a Northern HRV technical specification. (PDF)

CMHC: Ventilation Research In Multi-Unit Residential Buildings
CMHC provides cross-Canada reseach report that discusses ventilation issues in multi-family buildings and how they relate to possible moisture problems. (PDF)

Energy Conservatory: Overview Of Exhaust Fan Flow Meter
Energy Conservatory supplies new exhaust fan flow meter that allows the testing of the amount of air flow at each ventilation grill, quickly and accurately.

Energy Vanguard: 4 Ways to Do Balanced Ventilation
Energy Vanguard provides a quick rundown of the main ways to do balanced ventilation.

eScholarship: Air Distribution Effectiveness For Residential Ventilation
eScholarship displays the paper from Lawrence Berkeley National Laboratory that summarizes research into air distribution effectiveness for residential mechanical ventilation through simulation and comparison of normalized exposures. (PDF)

GBA: Designing A Good Ventilation System
Green Building Advisor article descries how to design good residential ventilation system.

GBA: How Much Fresh Air Does Your Home Need?
Green Building Advisor says the latest version of the ASHRAE 62.2 residential ventilation standard calls for bigger fans, and Joe Lstiburek is ticked off.

GBA: Mechanical Ventilation For Affordable Existing Housing
Green Building Advisor describes when you need to add whole-house mechanical ventilation to an existing home and what to use when you do.

GBA: Should Occupants Have Control of Their Home Ventilation System?
Green Building Advisor says some installers make mechanical ventilation difficult for occupants to override, but is that the right approach?

GBA: Ventilation Doesn't Happen In A Vacuum
Green Building Advisor describes why an exhaust fan or a supply fan won't bring in as much outdoor air into your home as you may think.

GBA: Ventilation For Your Tight House
Green Building Advisor podcast discusses how to get your ventilation system correct after your house is tight.

JLC: Choosing A Whole-House Ventilation Strategy
Journal of Light Construction describes issues and considerations for choosing a whole-house ventilation strategy.

LBL: Association Of Ventilation Rates With Sick Building Syndrome
Lawrence Berkeley Laboratories paper provides initial estimates of how the incremental health benefits per unit of increased ventilation diminish at higher levels of ventilation.

NRCan: How To Get Ventilation You Need In Your House
Natural Resources Canada describes issues and considerations for getting the ventilation you need in your house. (PDF)

Resave: 8 Steps To Better Ventilation In Existing Homes
California Resave site describes 8 Steps to better ventilation in existing homes. It covers assessing the home, kitchen & bath ventilation, whole-building ventilation rate, whole-building ventilation type, control strategies, duct design, installation, and commissioning. Choose to see the 8 different steps from the right side panel.

RESNET: Online Video Describes Ventilation Flow Testing Procedures
RESNET and Panasonic online training video shows the most common testing procedure for exhaust ventilation flow.

US DOE: Continuously Operating Ventilation & Exhaust Fans
Building America Solution Center online guide describes how to install continuous operating exhaust fans.

US DOE: Evaluating Ventilation Systems for Existing Homes
US Department of Energy report Evaluating Ventilation Systems for Existing Homes describes evaluation and selection of ventilation systems for homes in Las Vegas that are receiving dramatic energy, aesthetic, and health and safety improvements. (PDF)

US DOE: Infiltration Effects On Residential Pollutant Concentrations & Ventilation
US DOE report Infiltration Effects on Residential Pollutant Concentrations for Continuous and Intermittent Mechanical Ventilation Approaches presents a methodology for comparing ASHRAE- and non-ASHRAE-specified ventilation scenarios on relative indoor pollutant concentrations. The results suggest that long-term concentrations are the most important metric for assessing the effectiveness of whole-house ventilation systems in meeting exposure standards and that, if chronic health exposure standards are met, acute standards will also be met. (PDF)

US DOE: Selecting Ventilation Systems For Existing Homes
US Department of Energy report Selecting Ventilation Systems for Existing Homes discusses where, when, and how much ventilation is appropriate in a home, including some discussion of relevant codes and standards. Advantages, disadvantages, and approximate costs of various system types are presented along with general guidelines for implementing the systems in homes. (PDF)

US DOE: Testing Smart Whole-House Mechanical Ventilation Control
US Department of Energy report Field and Laboratory Testing of Approaches to Smart Whole-House Mechanical Ventilation Control, explores how smart ventilation controls balance energy consumption, comfort, and indoor air quality by optimizing mechanical ventilation operation to reduce the heating and/or cooling loads, improve management of indoor moisture, and maintain IAQ equivalence. (PDF)

US DOE: Ventilation Strategies In New Construction Multifamily Buildings
US Department of Energy report Evaluation of Ventilation Strategies in New Construction Multifamily Buildings describes field validation of performance of four substantially different strategies for providing make-up air to apartments. (PDF)
Product Supply

HVI: Certified Products Directory
US Home Ventilating Institute supplies certified products directory of approved products based on industry testing standards. Just click on the link you want and view them for free.
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