Thanks for posting with tech details and biz context!

Both Window HRV and Quiet Corsi-Rosenthal MERV13 Air Filter are business projects which deserve attention from those with more money than time. They are compatible with decentralized manufacturing, field testing and new building regulations for indoor air quality.

12 May 2023, https://news.ycombinator.com/item?id=36238958

  The US Centers for Disease Control and Prevention has extensively updated its ventilation guidance on helping prevent indoor transmission of the virus that causes Covid-19. The agency had advised people to ventilate indoor air before, but this is the first time a federal agency has set a target – five air changes per hour – for how much rooms and buildings should be ventilated.

  Air quality experts cheered the updated recommendations. “It’s a monumental shift. We haven’t had this. We haven’t had health-based ventilation standards,” said Joseph Allen, director of the Harvard Healthy Buildings Program. Allen says that although it’s easy to see the guidance only in the context of Covid-19, it will help with many other airborne hazards like wildfire smoke, allergens and other infectious diseases, such as the flu.

  The move comes the day after the US ended its public health emergency for Covid-19.