Building Codes, Efficiency & Passive House Principles On Existing Homes On the Passive House in the Real World (with Mike Duclos) discussion board… Takeaways: Homeowners looking to incorporate Passive House principles in existing buildings should consider getting a home energy audit. Still, after a home is built, serious energy reductions (say 50% to 90%) become very expensive.… Continue reading “Building Codes, Efficiency & Passive House Principles On Existing Homes”