ERV / Guides

How to Choose between an HRV and ERV system
HRV and ERV

Choosing between an HRV and an ERV

...ERV Ventilation Exchanger Systems . The key questions are: How much fresh air is enough? How much fresh air comes in through the building envelope? What is the difference between an ERV and an HRV? How to choose between an HRV and an ERV? How much fresh air is required in homes and the bes...

Wildfire Smoke & How to Keep it Outside Homes
Healthy indoor air quality

How to keep wildfire smoke out of Green Homes with mechanical ventilation systems?

...ERV's can reduce indoor pollutant levels by constantly changing the air in a building. However, this approach does not work when there is a wildfire in the area, since large amounts of harmful substances are released into the air. Additional measures are needed to conserve indoor air quality during wildfires. O...

Condensation on windows leads to mold & mildew in homes, ERV & HRV systems help
Ventilation

Ventilation & air exchangers

...ERV? Energy Recovery Ventilation ( ERV ) is the process of exchanging the energy contained in normally fan extracted stale or humid air from homes and using it to treat (precondition) the incoming outdoor fresh air in residential and commercial HVAC systems. During warmer days, an ERV system pre-cools and dehumidifie...

Passive Solar Home design at it's best - Kenogami House - EcoHome
Passive solar home design

Ecohome Kenogami House wins Home of the Year Award

...ERV (Energy Recovery Ventilator) While similar in concept, an ERV (Energy Recovery Ventilator) was chosen over an HRV (Heat Recovery Ventilator) , as they are particularly well suited to extreme northern climates. Air is able to support less and less water vapour the colder it gets, and an ERV extracts that energ...

Solar panels power the Kenogami House in Saguenay, Quebec
Off-grid and Net-Zero Housing

The Kenogami House: Energy systems in Net Zero Energy Home Design

...ERV): Energy Recovery Ventilator installation in this Zero Energy Home © Ecohome An ERV system uses basically the same principle as an HRV (Heat Recovery Ventilator) , which preheats fresh air before it is distributed through the house. In addition, An ERV system also regulates indoor humidity levels which is i...

Problem areas of air leakage in a home and blower door test being cond
Air and vapour barriers

Airtight Construction of Homes is Essential: "Your house sucks." "Oh yeah? your house blows!"

...ERV rating of a filter (Maximum Efficiency Reporting Value), which determines the amount of particulate they collect and the quality of air they expel. As a bench mark, the LEED rating system lists MERV 11 as a 'good' quality , MERV 13 as 'excellent'. The higher the number the better. You always want an airtight hous...

Finished basements can lead to mold and mildew
Healthy indoor air quality

Why are basements moldy? How to fix or Prevent a Moldy Basement

...ERV System . The only way walls below grade can possibly dry is to the inside. We have to stop trying to prevent that by wrapping them with an impervious layer of plastic. We also have to realize that building below grade is a different beast that building above grade, and to start respecting the laws of physics when...

The importance of Cleaning HRV intakes
HRV and ERV

How to keep your HRV clean and operating efficiently

...ervicing is worth the money; it will pay for itself through less wear and a longer lifespan of equipment, but also in more efficient operation, and above all, healthier indoor air quality. To read more about the importance of Air Quality in Homes - see here , to read more about how to choose between a HRV & ERV venti...

Living green wall
Healthy indoor air quality

Living walls: what they do and don't do

...ERV and choosing non-toxic building materials and surfaces finishes . So while we quite like living walls, we question claims about their impact on indoor air quality. Simply due to the rate of air leakage in most buildings, it would be difficult for anything short of an airtight house and a virtual jungle of plants ...

HEPA filters & SMART Air Filters catch airborne dust, pollen, allergens, viruses
Healthy indoor air quality

Buying guide for home air filters in furnaces - HEPA, SMART or Regular?

...ERV filters range from 1-16; the higher the value the higher the performance. • Air filters with a MERV rating of 6 are capable of catching pollen, lint, and dust. • Air filters with a MERV rating of 8 are capable of removing dust mites and mold. • Air filters with a MERV rating of 11 are capable of catching pet ...

Preventing radon gas in homes starts with testing for radon - the only sure way
Radon in Homes - Mitigation

Radon Gas Awareness - Up to 10% of North American homes tested have unsafe radon levels

...ERV to protect the indoor air quality of your home. Find all you need to know about Green Home Construction in the Ecohome Green Building Guide Pages .