> All that's needed for good indoor air quality (IAQ) is an ERV/HRV which exhausts stale indoor air and brings in fresh outdoor air (through a filter) The reco

> All that's needed for good indoor air quality (IAQ) is an ERV/HRV which exhausts stale indoor air and brings in fresh outdoor air (through a filter) The recommendations you mention are together features of the Passive House[1] building standard that seeks low energy use as well. If you build a building to a high standard, it will have a tighter envelope to retain heat/cool and protect against water intrusion. If the envelope is tight, you must actively manage airflow through an ERV/HRV. The consequence is that these buildings are supplied with continuous fresh air, and their ERV can be set up to dynamically react to air quality and other issue to ramp up the transfer.[2] There's a subculture of builders pursuing these qualities in their building, represented for example by groups like "Building Science and Beer" in Austin[3], and Matt Risinger's Build Show[4]. [1] https://www.treehugger.com/what-is-a-passive-house-principles-and-design-5443122 https://www.treehugger.com/what-is-a-passive-house-principle... [2] https://www.broan-nutone.com/en-us/ai-series https://www.broan-nutone.com/en-us/ai-series [3] https://www.instagram.com/bs_and_beer_atx/ https://www.instagram.com/bs_and_beer_atx/ [4] https://www.youtube.com/@buildshow/videos https://www.youtube.com/@buildshow/videos