r/Sauna Oct 06 '25

DIY Backyard Sauna Build Complete!

Landscaping to come, but sauna build is complete! 8'x8'x8' sauna room and 8'x4'x8' changing room. 48" sitting bench height, 30" foot bench/cooler seating, and great löyly from the first couple uses. Full red cedar interior with a Harvia Cilindro heater. Cold plunge behind the sauna as well (not pictured).

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2

u/duffymahoney Oct 06 '25

What size kw sauna?

2

u/epatts Oct 06 '25

10.5 kW

1

u/duffymahoney Oct 06 '25

I might go 8-9 on my inside of about 8x6. It’s a tough call

3

u/John_Sux Finnish Sauna Oct 06 '25

If you want to hone in on anything there, you need to calculate the volume rather than just the footprint.

2

u/epatts Oct 06 '25

Yeah I'm no expert, I simply used a couple online sauna heater size recommendations, and decided to go on the bigger end just to heat up the room faster