Great to see your thinking laid out this way, and of course thank you for your interest in our (1Day Sooner/Rethink Priorities) report!
It was useful to see the discussion of possible overhype from the funding side of the field, since I don’t have insight into funding decisions. On the other hand, there are reasons funders might want to focus attention on far-UV, without disregarding the usefulness of conventional-wavelength GUV: since far-UV requires more research than conventional-wavelength systems at this time, but might ultimately be easier to install, the far-UV research payoff could be very large for increasing adoption of GUV in general. I expect that conventional-wavelength systems would benefit from investment into R&D for easier installation, but that’s not obviously a place for philanthropic funding. The safety studies necessary for far-UV are too expensive for the current market size, so if far-UV research does not get more philanthropic funding than conventional-wavelength GUV, far-UV safety studies might not be performed in a rigorous way. However, I would agree that funders should be wavelength-agnostic if they are directly funding installations.
Because of the challenges facing comprehensive far-UV analysis, I was surprised that you didn’t think it would be very impactful for philanthropists to fund studies—broadly speaking, I agree about the lack of expertise, but this is a small enough field that the informed voices are fairly well-known within the field and I think interested philanthropic bodies would be able to consult those informed opinions. Again, I don’t have insight into the funding side of the process, so that may be optimistic. I am certainly biased, since 1Day Sooner does regularly apply/advocate for philanthropic funding for technical research! On the reverse side, personal experience has left me pessimistic about policy advocacy for GUV research, but your report has swayed me somewhat to at least consider the fact that there is not a concerted, heavyweight policy advocacy effort in this area.
I appreciated the argument on capturing the bulk of the risk by later deployment; it was a very helpful presentation of the case. I do think that there is a learning-by-doing element to GUV rollout (for either type of GUV), where rollout and analysis in select environments is necessary for better understanding broader GUV use cases. Identifying those environments is an element of the current 1Day Sooner IAQ project. I also would love to see the cost of GUV installation fall sooner rather than later in order to address endemic disease burden worldwide, e.g. via widespread installation in TB clinics. (I’m fully aware that this use case might remain impractical, but it’s nice to consider the potential to address global health! Of course if a funder is specifically trying to fight TB, I’d still recommend sinking their money into vaccine research or treatment.)
Finally, this report was extremely helpful for a current 1Day Sooner project! We’re working on a report to assess the potential for market shaping techniques to accelerate the adoption of indoor air cleaning technology. This post, and writing up this comment, really helped clarify some of my thinking about the possible directions we’d been tossing around, so a huge thank you for that!
I have colleagues in other organizations who are involved in ASHRAE; one contributed to the development of 241! 241 is great, and to be very clear, my job is not to promote far-UV, it is to promote indoor air cleaning. Far-UV gets a lot of attention in my social circles because it is exciting and new, and people have a lot of questions about that specifically—this post is meant for the very narrow case of answering questions I’ve directly gotten about far-UV.