So the United States has announced it's withdrawing from the Paris Accord, the international agreement with nonbinding measures to mitigate the effects of climate change. Now everyone's up in arms, speaking in exasperated tones about the travesty of this decision.…
Today's installment in the duct design series is a simple one. It's just a straightforward calculation that gives us the design friction rate from the two quantities I discussed in my last two articles. In part 2, I told you…
The Pembina Institute published a report on Passive House last year. Titled Accelerating Market Transformation for High-Performance Building Enclosures, the report looks at the challenge of climate change, what Passive House has to offer, the market for high-performance buildings, and…
Today we move another step down the road of duct design. I started the series with a look at the basic physics of air moving through ducts. The short version is that friction and turbulence in ducts results in pressure…
In part 1 of this duct design series, I discussed the basic physics of moving air in ducts. Now we're going to take that and use it to figure out how to make all the parts work together properly. First…
When it comes to heating and cooling homes, forced air distribution is king. Yeah, my Canadian friend Robert Bean of Healthy Heating pushes radiant for both heating and cooling, and my Texas friend Kristof Irwin drank that koolaid and installed…
The photo above is from one of the home energy rater classes we taught a few years ago. We had 13 students in that class. Only one was a woman. That ratio actually is comparable to what you see in…
Just a quick note for you this morning about some building science resources I found on the Web this week. As alluded to in the title, one relates to the top of the house (cathedral ceilings) and the other to…
I've been guilty of perpetuating a myth. Last month I wrote an article in which I said installing insulation, "cavities are filled completely with as little compression as possible." But is compression really such a bad thing? When I posted…
Dick Kornbluth was an insulation contractor in Syracuse, New York back in the 1970s. Then he discovered home performance. It's really the logical place insulation contractors, HVAC contractors, and similar companies to end up. Rather than doing just one job…