The gang is super-excited to finally get Patrick Heulman, a leading building science expert, on the show! We've talked about having him as a guest for a long time and now that we're temporarily recording our podcasts from our homes, we were able to get Pat on the show. He's an Associate Extension Professor with the University of Minnesota and works on several other projects as well.

The show starts out digging into Pat's background and then moves onto the importance of considering a house as a system. Pat talks about how air exchangers first began making their appearance in Minnesota in the early 90s, and Pat also talks about "The Cliff", the benefits of insulation at the exterior of homes, and perfect wall systems for homes.

The show ends with Tessa sneaking in a question about one-and-one-half-story homes.