It started on Twitter the other day. I posted the photo you see to the left, and a discussion on flex duct ensued. One person, who's been known for taking strong stances now and then, saw it and said, "Flex…
What makes a Green Home green? Is it the bamboo floors? Maybe it’s the low-e windows or the extra insulation in the walls? What about a high efficiency heating and cooling system? Or maybe it's a plaque by your front…
A room full of builders, contractors, developers, and designers recently participated in a workshop on ENERGY STAR Version 3 for homes. Sponsored by E3 Innovate of Nashville and presented by Allison Bailes of Energy Vanguard, the class covered the basics…
Hey, HERS raters, what if I told you that you could get the volume of a multi-pitched roof for all of your home energy ratings without the need to calculate a single algebraic formula? Or, how about wall area? I know, I'm…
In my quest to educate the world on building science topics, I find that I often have to go back to basics. Whether it's the basic nature of heat, why we're using the wrong quantity to characterize infiltration rates, or…
My grandfather, the original Allison Arthur Bailes, was an electrician, plumber, HVAC contractor ('heating & air man'), and refrigerator repairman. In the '70s when I was a teenager, I used to spend a couple of months each summer working 'on…
Guest post by David Richardson of Thermal Performance Services in the Lexington, Kentucky area. David is an EVER rater, HVAC contractor, and combustion safety instructor for the National Comfort Institute. This is his second guest post in the EV Blog,…
My grandparents in Louisiana heated their home with natural gas space heaters in all the rooms of their home. I loved them because fires are just so fun! (I'm not going to tell you about that time my friend Bubba…
Guest post by Ed Voytovich of Building Efficiency Resources (The BER). I know Ed mainly through our interactions in the LinkedIn RESNET BPI group, where he's a frequent and knowledgeable contributor, though we also met IRL (in real life) at…
In yesterday's article, I wrote that atmospheric combustion appliances should not be inside the conditioned space of a home. If you have a furnace or water heater that draws air from the room, uses it in the combustion process, and…