{"type":"rich","version":"1.0","provider_name":"Transistor","provider_url":"https://transistor.fm","author_name":"Build It Forward","title":"What Building Science Misses About Healthy Homes with Ashley Murphree","html":"","width":"100%","height":180,"duration":2920,"description":"Ashley Murphree built herself a tiny house out of a shipping container using every good building science practice she knew. Something in it was still making her sick.\nIt was not mold. She knew the building well enough to rule that out. But despite testing and doing everything right, the symptoms continued. That experience opened up a question she has been chasing ever since: what else are we not accounting for when we call a building healthy?\nIn this conversation on Build It Forward, recorded in the Building Science Corporation Test Hut at Summer Camp 2026, Nick Falkoff sits down with Ashley, a mechanical engineer and former general contractor who runs Alchemech Engineering in California and designs systems for high-performance homes.\nAshley walks through what she has learned about sensitization and why an occupant who has already reacted to something needs a very different building than one who has not. She gets into the research of Dr. Robert Naviaux at UC San Diego on the mitochondria and the healing cycle, and why a so many different triggers can produce the same condition. She makes the case that we are still not putting large, well-sealed filters in the right places, and asks whether the portable air purifier sitting in the corner is now part of the architecture.\nThe second half turns to mechanicals. Air to water monoblock heat pumps, thermal storage as a battery with no precious metals in it, and why chilled water gives you dehumidification options that refrigerant does not. It ends on an idea for an exposed, cleanable coil you could hang on a wall.\nThank you to Betsy Pettit for hosting us.\nWatch Ashley's Summer Camp presentation - Healthy Living in Tight, Compact Homes:\nhttps://www.youtube.com/watch?v=EjxuDkuQCOQ\nConnect with Ashley Murphree and Alchemech Engineering:\nhttps://www.alchemech.com | IG: @alchemech.engineering\nThank you to our production partner Benjamin Obdyke. Build Better™ with samples of their roof and wall products:...","thumbnail_url":"https://img.transistorcdn.com/-Ao_bwqJOd8XP1Oqx5_ardqmHaaRKP_qhVtz4noqcLM/rs:fill:0:0:1/w:400/h:400/q:60/mb:500000/aHR0cHM6Ly9pbWct/dXBsb2FkLXByb2R1/Y3Rpb24udHJhbnNp/c3Rvci5mbS9iZjE0/MzBkN2UyMTQwMzc0/M2NmZTY4NGRkZDQw/ZDUyZi5qcGc.webp","thumbnail_width":300,"thumbnail_height":300}