Energy Vanguard's president, Dr. Allison Bailes, will teach a three-hour workshop called What You Need to Know About HVAC to Work with HVAC Pros at the Mid-Atlantic Sustainability Conference in Harrisonburg, Virginia. Aimed at architects, engineers, builders, raters, and students,…
And the battle over air conditioner refrigerants continues. The US EPA just issued another warning, "cautioning homeowners, manufacturers of propane-based refrigerants, home improvement contractors and air conditioning technicians of the safety hazards related to the use of propane in existing…
When it comes to air conditioning, there are a lot of bad products and bad ideas out there. Here are a few: You can buy a cover for your condenser that could kill your compressor. Some people don't think the…
Do you know what size your air conditioner is? In the world of building science, you'll hear a lot of talk about why oversized air conditioners are a bad idea. Why? Briefly, they may not dehumidify as well, short-cycling wears…
Three years ago I wrote an article titled, Don’t Let Your Attic Suck - Power Attic Ventilators Are a Bad Idea. Nearly a hundred thousand page views and 93 comments later, it's still generating lots of heat. I don't know…
This week we got a box full of hobos delivered to the world headquarters of Energy Vanguard. Well, OK, they weren't the kind of hobos you see at left but actually HOBOs, the data loggers made by Onset, as you…
I've been in Lexington, Kentucky this week at the Midwest Residential Energy Conference. It was great! (And I played nice - I didn't mention in any of my talks that I'm a Florida Gator.) One of the many highlights for…
Earlier this month I went to NESEA's Building Energy conference, and I think I heard three terms more than any others: heat pump, net zero, and passive house. (The second most popular trio was beer, wine, and whisky, but that…
Heat pumps can get frosty when they run in heating mode. It doesn't happen all that often, but it's a fact of life when you're trying to extract heat from cold, outdoor air. Sometimes the outdoor coil goes below the…
Not long ago, Erik Henson an energy auditor with HD Engineering and Design in the Kansas City area, posted the photo below on LinkedIn. As you can see, frost has formed on the walls and ceiling inside the house. It's…