Look at that photo above. Is condensation really responsible for all that moisture you see? We use the term "condensation" a lot when talking about water vapor interacting with materials. But when it comes to porous materials like wood, concrete,…
The humidity is returning for the summer here in the southeastern US. And as you may know, I don't use relative humidity to gauge how humid the outdoor air is. Why? For starters, the humidity can get up to 100%…
When can doing something good for your house turn into something bad? Hmmm. There are way too many answers to that question, so let me narrow it down. Is it possible to make your ducts more airtight, a good thing,…
That photo above is from my basement. In case you missed my last article, I just bought a 1961 ranch-style house in Atlanta and am embarking on the wonderful building science adventure of turning it into a high-performance home. Ultimately,…
The ASHRAE conference and AHR Expo were in Atlanta last week. Because I live here, I didn't have to stay in a hotel but a lot of people I know came to town and did stay in hotels. One of…
A lot of people don't understand the best way to defog their car windshield in wet, cool weather. About 30 years ago, I was on a group trip on a hired shuttle bus. The outdoor temperature was probably in the…