Dr. Joe Lstiburek of Building Science Corporation is on a mission. The issue is residential ventilation. He contends that the residential ventilation standard, ASHRAE 62.2, ventilates at too high a rate, causing problems with humidity in hot or mixed humid…
You can install a radon vent the hard way. Or you can install one the easy way. I discovered in Nashville a couple of weeks ago that home builders there prefer to do it the easy way. That is, they…
"ASHRAE 62 is the only national consensus standard document there is. Follow 62.2. Resistance is futile." So said Dr. Max Sherman last summer in a presentation for the Building America Technical Update meeting. (Download pdf official report here.) That statement…
Spray foam insulation is an air barrier. When you use it instead of the fluffy stuff (fiberglass, cellulose, cotton), a house will be more airtight. That's good. Spray foam insulation is an air barrier. When you use it instead of…
Neville poked his head up through the scuttle hole into the attic and surveyed the situation. Troy immediately heard a scream erupt and had to get out of the way as Neville quickly jumped down off the ladder. Neville poked…
I've written a couple of articles recently about the complexities of mechanical ventilation and the battles going on regarding when to install it, how much to ventilate, and whether ASHRAE 62.2 is worth all the resources we're throwing at it.…
With the help of people who know a lot more than I do, I'm slowly getting this stuff figured out. I wrote about my problems with using ACHnat a while back, and when I posted that article at Green Building…
I went to school with Cajuns in south Louisiana, and fights were a big deal. They happened frequently, and when they did, a small crowd would gather. The noise would grow quickly and soon everyone in the schoolyard would run…
Heating and air conditioning contractors, like the rest of us, make mistakes. They make mistakes that hurt performance and efficiency of the HVAC systems they install and maintain. They make mistakes that hurt their customers sometimes. And they make mistakes…
You'd never settle for a recirculating toilet, would you? Press the lever and everything in the bowl just swirls around and around. Never leaving, just recirculating. That's the image Professor John Straube painted for us last week in his talk…