home-ventilation / Green Building & Sustainable Home Renovation Information & Advice

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

Choosing between an HRV and an ERV

All homes need ventilation, whether natural or mechanical with an ERV or HRV system. Buildings and houses are no longer constructed leaking heat and moist air the way they used to be; we now build them as airtight as we can, especially Passive House or LEED certified homes. This makes mechanical ventilation essential i...

The importance of Cleaning HRV intakes
HRV and ERV

How to keep your HRV clean and operating efficiently

Why cleaning HRV units is so important  When any machine has its normal operation hampered, it will reduce its efficiency and ability to function properly. Many of us are probably guilty of forgetting about basic maintenance of some of the mechanical equipment in our homes; keeping your HRV (heat recovery ventilator) c...

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!"

Air Tightness in Houses - All about Balancing Air Pressure in the Home We go on incessantly here about the importance of air barriers in home construction to reduce air leakage, but no matter how hard you worked to make a house airtight, if the pressure isn't balanced you will be sucking air in or forcing it out and, d...

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

Ventilation & air exchangers

Homes built in the last 40 years in Canada are relatively airtight. Before that we generally relied on leaky uninsulated walls to provide fresh air and prevent mold and mildew, and they did that very well. Cost and comfort had us adding insulation, but not necessarily sealing our walls. The folly of this was quickly re...

DIY air exchanger installation video
HRV and ERV

DIY Lunos HRV air exchanger installation video

This heat recovery ventilation (HRV) system is very different than what people are probably used to seeing, where air is directed to a centralized core for a heat exchange before being exhausted from the house. Lunos is a decentralized system with a series of self-contained units, each with their own ceramic heat exch...

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

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

How to protect indoor air quality from smoke during wildfires in homes with HVAC? As we move towards summer in Canada and the USA, we're hoping that last years wildfires are not going to be as bad again this year - but unfortunately in areas like Calgary and the North East of the USA, there have already been air qualit...

Heat Recovery Ventilation - Lunos video
HRV and ERV

Lunos ductless air exchanger

Almost daily, new products come on the market that are more efficient, more effective, and/or more innovative. The ones we are really impressed with will make it here to our product of the month feature. Today we look at a new solution for changing the air in your home while maintaining excellent energy efficiency in h...

Understanding sound transmission in homes
Insulation and soundproofing

Understanding sound transmission in buildings

Before embarking on any structural changes, it is most important to understand that the sound isolation between two homes is not determined only by the common wall or floor. All the other parts of the construction - side walls, ceilings, floors under walls - can transmit sound. Flanking sound transmission (see below), ...

Real estate

Real estate

For most of us, purchasing or building a home will be the biggest investment of our lives. This section is about knowing what to look for in new homes to get the best value for your dollar, or what to look for in a building lot for the same reasons. What to look for in a location: Being close to where you work and pla...

Aeratron AE2 ceiling fan
Ventilation

Ceiling fans and air circulation- video

In order to ensure comfort and get the most from the various systems of our house air needs to move around. Our air source heat pump and our heat pump water heater work together in boosting the efficiency, and the ceiling fan is a big part of making that happen. This video explains the relationship between those syste...

Techniques for reducing sound transmission in buildings
Insulation and soundproofing

Controlling sound transmission in buildings

The first step to controlling sound transmission in buildings is assessing the situation. What kind of noise is it? Noise in buildings is usually assigned to one of three classes: Airborne sound: Sound such as voices, TV or stereo sounds. The source does not strike or vibrate against the structure of the building. Stru...