![Understanding Wet Bulb Temperature Is Easy When You Know How It's Measured [Photo By Marco Van Der Haar, CC BY 2.0 Deed
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That gorgeous photo of a Massachusetts lake above illustrates some interesting psychrometrics. Those little bits of mist are tiny water droplets full of molecules that not long before had been part of the lake. In the air between those misty…
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,…
Cold air is dry air, right? Think about the humidity in your house in winter compared to what it is in summer. If you're in a humid climate, it's going to be drier in winter. Even in dry climates, it's…
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%…
Every area of building science has its jargon. And I'm not just talking about the acronyms, initials, and abbreviations that get thrown around casually. I've been making a list of the most interesting, useful, or stupefying BS terms and giving…
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…
I've been on a bit of a mission for the past several years. My goal is to get more people thinking about humidity in terms of dew point rather than relative humidity. Why? Because relative humidity is misleading. That whole…