Webinar: Achieving Net Zero Energy

This webinar from December 2015 provides an overview of the design processes and analyses that were used to set the project on track toward Net Zero Energy during Conceptual and Schematic Design. The studies include “simple box” energy modeling to determine the best passive design measures, comparison of design options, analysis of shading strategies, and optimization of envelope parameters like R-values and glazing. I used a variety of tools including Climate Consultant and the CBE Thermal Comfort Tool — but mostly I used Sefaira Architecture. (Full disclosure: I worked for Sefaira for nearly five years; that’s where this webinar comes from originally.)

I’ll be going into more depth on these studies in future posts, but this webinar is a great overview.

Iowa Nest Residence: Net Zero Energy at Conventional Cost


The Iowa Nest is a Net Zero Energy-targeted residence in rural Iowa. It is designed to supply 100% of its energy needs; to be comfortable without conventional air conditioning; to fit into the landscape; to last for hundreds of years; and to do all of this on a conventional construction budget.

This blog will be run jointly by me (Carl), the primary designer, and by the owners, Peter and Jen. Our hope is to share our experiences designing and building this house so others can learn from our mistakes and re-create our successes. Our experience has shown us that it is possible to achieve remarkable performance (and great design) with a reasonable budget — and we hope to show others how they can do this, too.

You can subscribe to our mailing list to get regular updates: just send an email to list@iowanest.com.

Let’s start by taking a closer look at the project’s design goals.

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