The Passive House Institute US reviews the metrics and rationale of their standard on a three-year cycle. PHIUS+ 2018 was announced at the Passive House Conference in Boston this September, and I find it a brilliant and positive advancement.
Keep in mind that the Passive House Standard prioritizes energy conservation, so its main measure is the annual and peak consumption of space conditioning (how long and hard the mechanical system needs to work). When PHIUS+ 2015 was announced, it was noted that the space conditioning metrics were set so that the amount of insulation required to meet the standard would be beyond the cost-optimized amount; the 2015 standard was pushing hard on passive conservation. (more…)
There’s a terrific video my buddy Corbett did for the Illinois Association of Energy Raters called “If Cars Were Built Like Houses.” It challenges homebuyers to think about what level of performance they will get out of the huge investment they’re about to make. What if houses were built like cars—in a factory, with quality control and third-party testing? That’s how we approach modular prefab—a way to get a better, more predictable product. The first thing to know is that a modular prefab house can be a “trailer home” or it can be a high-design high-performance, low-toxicity (no “new car smell”) home. (more…)
It’s our favorite tour of the year, the Green Built Home Tour, and our Modular Prefab Modern Farmhouse will be featured on this year’s tour on July 28-29, 2018. Our amazing clients, Nate & Deb, will open their new home for visitors to tour their innovative, prefab, modular, Zero Energy Ready Home (DOE). Tom will lead tours and answer all your questions about prefab and green design.
Tickets are available for purchase on the Green Built Home Tour site.
On a perfect late summer day we invited a bunch of friends to watch our first modular prefab house being set.
First off, some terminology: prefab is anything factory-built, so it could be trusses, walls, floors; but modular is when “chunks” of the building (or the whole thing if a tiny house) are built in the factory. We were interested in the efficiency and quality control of prefab, and with modular, we could get windows installed, rough electrical wiring, rough plumbing, air sealing (by using the Zip System for sheathing), cavity insulation, and drywall all done in the factory. In our case, we worked with Hi-Tech Housing of Bristol, IN since they are specifically a custom modular manufacturer, No stock plans here–you just take them whatever you’re interested in building, and they help figure out how to break it into chunks that can be transported on trucks. Once the modules are ready, a “set crew” and crane operator are hired to put it together in the field. (more…)