Swedish Architect Joakim Kaminsky of Kjellgren Kaminsky Architecture shows a picture of his clients who bought the Villa Atrium concept house which set the new Swedish record for Passivhaus air tightness standards at 0.03 ACH (air changes per hour). (Photo by Mignon O’Young)

Swedish Architect Joakim Kaminsky of Kjellgren Kaminsky Architecture shows a picture of his clients who bought the Villa Atrium concept house which set the new Swedish record for Passivhaus air tightness standards at 0.03 ACH (air changes per hour). (Photo by Mignon O’Young)

Swedish Architect Joakim Kaminsky of Kjellgren Kaminsky Architecture shows a picture of his clients who bought the Villa Atrium concept house which set the new Swedish record for Passivhaus air tightness standards at 0.03 ACH (air changes per hour). (Photo by Mignon O’Young)