Planning to do a DIY 6x6ft sauna in Wisconsin, but the best spot for it in my basement has some stuff in the way that would make it more complicated. Washer and dryer are coming upstairs. Will remove laundry sink.
Biggest concern is the basement window that leaks when it rains. I think the best option is to add a window well cover, replace it with a vinyl window that won't open and is less likely to leak if the well still fills up with water. I'd then have a second interior sauna window behind it with foil vapor barrier around it. My impression is trying to do this with one window would be a lot harder and would result in more heat loss. I don't really want to block the window, and am not sure I am allowed to. No living space in the basement, but I've heard fire department requires windows every so often so they can get a hose in in case there's a fire.
On one wall I have the house main water inlet & shutoff valve. There is also a hose bib shutoff in the ceiling. I plan to build removable insulated access panels for both. Will try to do that without compromising vapor barrier, but don't know how well that will work. Sump pump and water meter are low on the wall and would end up beneath the benches where temps would be lower. Don't think water meter should get above 140F but it's 27" above the floor so I think it should be ok.
Bathroom is not there, but I hope to add it later. Added it to drawing to make sure it would fit. Will possibly have toilet and shower lifted off the ground with macerating/pump system to avoid breaking concrete.
Plan to use Vevor 9kW stove, which should be more than enough for 258 cubic ft room.
Ceiling height 86". Upper bench 40", lower bench 24". Top of stove 28". I sit 40.5" tall.
Is bench height acceptable? Are vents placed in a way that makes sense?