Air tightness / Guides

Passively-heated off-grid LEED house in Low, Quebec
Off-grid and Net-Zero Housing

Off-grid living blog: a firsthand account of building and living in a remote area

...air with a device like a heat recovery ventilator (HRV). Blower door test to check for air permeability being conducted © Ecohome Airtightness is measured in air changes per hour (ACH), which measures the total volume of air inside a building, and how many times in one hour that this much air would be replaced ...

Passive home designer Harold Orr, one of the original high performance homes
Passive solar home design

The principal designer of the house that inspired the global Passivhaus movement reflects on the project that started it all.

...Air lock entry at the doors. With an air tight building an air lock is not really of much value, the whole house acts as a air lock and air doesn't blow though the house because there are no holes for the air to flow through. Soffits designed to allow full sun in the winter and complete shade for the windows in the s...

The EC3 Tool - Skanska - Calculating & Comparing Carbon Footprint of Buildings
Planning and Design

Calculating the Carbon Footprint of Buildings, Introducing The EC3 Calculator From Skanska

...air-tightness , more efficient heating , better internal air quality … which is a step in the right direction, but far from the whole solution to better buildings and homes. With the introduction of LEED V4, PHIUS+ and Zero Energy Ready Home standards across the US and Canada, supported by higher performance building...

Passive House in Quebec
Passive House

The Passive-Aggressive House - Our History of a Passivhaus Build

...air-tightness , jaw dropping amounts of insulation, and a fresh air intake and heat exchange system designed from scratch (spawning a company that still exists). It was no solar hippie house. The first Passive House - Saskatchewan Conservation House Image via the Saskatchewan Research Council ...

Passive House certification - PHI or PHIUS? The Spring House Passive House
Passive House

Everything you need to know about Passive House certification

...airtightness of a building is calculated by measuring leakage - the volume of air (in cubic feet per minute, CFM) entering a building pressurized at 50 Pascals and dividing that measurement by the net air volume of the house. Simple enough. But does it make sense? After all, air leaks happen through a building’s shell ...

Passively-heated off-grid LEED Gold home
Off-grid and Net-Zero Housing

Off-grid living blog part 6 - energy modeling projections and real performance

...air infiltration, at 2,783 kWh/year. When the house was half-complete a blower door test showed that we had an air-tightness of 1.47 [email protected], but as I outlined in this post, the house is probably tighter now and this heat loss lower than the model suggests. The concrete slab and foundation walls, at 2,314 kWh and ...

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?

...airtight envelope also helps prevent the infiltration of smoke. Airtightness should be a priority to preserve indoor air quality during wildfires , since air leaks reduce the effectiveness of other measures. Caulking and weatherstripping can seal air leaks in existing buildings, and airtightness can be added as a des...

The Top Twelve Green Building Trends for 2020
Planning and Design

Find out what's trending in 2020 for Green Home Construction

...air-tightness targets to be met. This is not a small thing, since too few builders realize how much heat loss is due to air leaks in a home, and how important an air-tight home is for durability and efficiency. Also, we're seeing a proliferation of Net Zero Energy and Net Zero Ready certification schemes being devised ...

Building Green Homes on a Budget is Possible - Our top tips
Planning and Design

Top tips for planning and building a green home on a budget

...air barriers carefully to ensure air tightness in a new home build - (see here) as long as you have the time to ensure the job is completed properly before the final finishing is to be applied, then this is within the skillset of most competent DIY'ers. In my past, as a builder, the one task we would often welcome fr...

Blower Door Tests - What's the Cost & Who Does Them?
Air and vapour barriers

What is a blower door test? What's the cost? How do you find a company to do one?

...air in from any existing hole in your air barrier no matter how small it is. The operator then determines your ACH (air changes per hour) based on the house dimensions and the volume of air in the home. Standard new home construction in North America seems to return an average air leakage rate of about 3 air changes ...