Any negatives to implementing passive house principles in a home addition?

Hi,I’m planning a ~675 SF single-story addition to my 1500 SF single-story house. I would like to implement some of the passive house design principles specifically an air-tight envelope and… Hi,I’m planning a ~675 SF single-story addition to my 1500 SF single-story house. I would like to implement some of the passive house design principles specifically an air-tight envelope and…Read MoreGreenBuildingAdvisor