I enjoy reading articles (even if this one felt like it had been translated slightly clumsily) where scientific rigor has been applied to something mundane.<p>I've gained an understanding, at least.
The sauna design rabbit hole is a very deep one.<p>If anyone is interested in more information about sauna design in general, Trumpkin's Notes are by far the most referred to guide out there. [1]<p>There are also new products [2] which help improve saunas which are not ideally designed or where there are constraints (ceiling height mostly) to deal with.<p>1: <a href="https://localmile.org/trumpkins-notes-on-building-a-sauna/" rel="nofollow">https://localmile.org/trumpkins-notes-on-building-a-sauna/</a>
2: <a href="https://saunum.com/en/" rel="nofollow">https://saunum.com/en/</a>
I am actually typing this from a sauna with less than ideal ventilation (slightly ajar glass door) - need to cut vent holes to the sauna/house walls but haven’t gotten around to it - so the timing is good. The main use of the ventilation is to not end up with too high CO2 concentration
Wouldn't it be more practical to have a prominent CO2 monitor and only exchange the air (maybe by opening the door for a few seconds) if it CO2 gets too high ?<p>Maybe it's hard keeping a co2 monitor operating in humid sauna conditions, I dunno.<p>Also, given that many saunas are not airtight, I wonder what a steady state CO2 concentration would be. It may be high, but not dangerous.
Some additional discussion on Reddit <a href="https://www.reddit.com/r/Sauna/comments/1b2skn6/a_45_year_engineer_clears_up_electric_sauna/" rel="nofollow">https://www.reddit.com/r/Sauna/comments/1b2skn6/a_45_year_en...</a>
Off-topic but I've been curious: how well do phones handle saunas? I thought the heat and moisture would pretty much be the worst environment for electronics. Is that not the case?
I have not noticed any venting in the sauna at my gym, but perhaps it's not obvious. It's a pretty big sauna, it will easily seat over a dozen people and people are coming in and out often enough that the door opening probably provides adequate air exchange.
tldr: place air inlet above the heat (B); air outlet on the other side at the floor (D). See figure:
<a href="https://www.saunatimes.com/wp-content/uploads/IMG_6556-1-560x640.jpeg" rel="nofollow">https://www.saunatimes.com/wp-content/uploads/IMG_6556-1-560...</a><p>This ensures: 1) quick heat up of fresh air 2) vertically uniform heat 3) creation of better steam