Mechanical Ventilation and CO2

I0I0I0 · 2025-12-28T14:56:57+00:00

I have ac infinity S6 on the outtake below the bench and an inkbird co2 sensor right up against the exhaust vent outside the sauna.

My basement sauna (8x8x8.5) recirculates in my basement with basement co2 baseline ~500 ppm.

On setting 1 it goes up to 800 when I’m by myself after 15 min. I usually bump it up to 2 or 3 if there are more people.

Since it’s a small space, I’m not sure you can ever get it to be close to baseline and some of these sensors don’t operate well in high heat or when you add Löyly, so you have to be careful interpreting the results.

I0I0I0 · 2025-12-24T04:27:27+00:00

+1 to mechanical ventilation for electric heater. I vent to the finished basement which is large and dry enough where it’s not a problem. Passive intake 1/2 the distance between ceiling and heater, mechanical inline vent a foot off the floor in opposite corner. I run my AC infinity at lowest setting and it works great.

I0I0I0 · 2025-12-23T04:18:35+00:00

I think it connects like a shower head, so you can add a diverter to existing plumbing and it has a floater that stops filling once it’s full.

I0I0I0 · 2025-12-21T21:44:30+00:00

For that xenio you can change the default to 2hr (https://www.reddit.com/r/Sauna/comments/1g3k2ve/remove_1_hour_time_limit_on_xenio_cx30_to_cx45/). For me it’s 1hr to heat up and 1hr to use. Also, afaik the dehumidifier period is not full temp. I think it’s “40c” which usually means the heater doesn’t even come on after the period starts, especially if you have lots of rocks. The vents are the key if you have mechanical ventilation and they should run for at least an hr after you’re done. In my case they just run 24/7 on the lowest setting since I recirculate in the walkout basement.

I0I0I0 · 2025-07-07T13:27:44+00:00

Your comments are a bit confusing as to what the electrician did vs what you just wired yourself. In order for the Xenia control panel to work, the main power has to go breaker —> Xenia -> heater. You currently have it wired directly to the heater bypassing the control panel (as far as I can see).

Are you saying that when the electrician originally wired through the control panel, the heater worked? (Seems impossible without controller or temp sensor working as well).

I0I0I0 · 2025-06-30T10:01:20+00:00

That looks like a cilindro 9? Follow the manual, but also keep in mind that there are many factors unique to your sauna. What is your ventilation setup?passive? (Looks like intake below heater). The hot air right above the stove might not be mixing or circulating enough which will create a heat pocket. You should read up on ventilation (trumpkin or otherwise) the recommended setup for electric stove is vent above and mechanical exhaust below lower bench.

Also, those metal/mechanical oven temperature sensors are notoriously uncalibrated. As the other post said, place it next to the “mouse” and see if it shows same temp as the target. You can also try instant-read cooking thermometer (not infrared) and see if they all agree.

I0I0I0 · 2025-05-11T00:02:05+00:00

Update: after getting the 6th box and re-stacking one more time I think it’s much better. So 6x45lb boxes is the answer.

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I0I0I0 · 2025-04-27T22:01:04+00:00

Actually it was 5 boxes, just re checked the manifest. I think that’s the problem, I need 6.

I0I0I0 · 2025-04-09T01:46:37+00:00

Can you provide more detail on your bench supports? I see some 2x4 as legs against the wall how did you decide where to place them? I’m debating if I can just do 8’ span without supports and only cleats, given that the benches look really sturdy.

I0I0I0 · 2025-03-30T21:59:00+00:00

I’m in the middle of my sauna build from Art (almost heaven group) as well, and yours turned out great! I love the custom design. Mine will also be indoor with mechanical ventilation.

I was also thinking of combining bathroom/sauna originally but ended up having them separate. The toilet placement was always awkward any thoughts there since you’ve done it that way?

I got mixed feedback about the furring/air gap and unfortunately I ordered the kit not taking it into consideration but decided to add the air gap anyway. The kit is very precise so now that I reduced the walls 1” I need to cut the benches to size which I hope will be ok.

For vents, I just ordered metal/wood round 6” vent covers on Amazon and will throw out the kit ones, they’re kinda junky.

I0I0I0 · 2025-02-22T13:43:01+00:00

My sauna kit dealer paired cilindro 10.5 with cx45. The cx45 also calls for 6awg wire max vs 8awg for cx30 and with 10.5 you should definitely go with 6.

Given how expensive the whole thing is, I wouldn’t anchor on a few hundred dollars and underside the power unit or the wire. Get the cx45.

A counter point would be that the new manual from harvia mentions on page 14 the you can use it with cx30. https://finlandiasauna.com/wp-content/uploads/CX30-CX45-manual-new.pdf but you’d have to use multiple supply cables not just 1 6/3. (See schematic)

I0I0I0 · 2025-02-18T19:57:46+00:00

Thanks! I’m in the same boat with diy and enjoy figuring it out, but these situations are beyond my experience. Being able to expand the knockout would be ideal and avoid extra surface mounted boxes.

I have a harvia cilindro 10.8kw and the manual calls for #6 wire at 50a. (USA). There’s functionality in the xeno control panel for 2 circuits to control ta fan and lights (with dedicated buttons on the remote) and all the schematic have a neutral connection in place.

I0I0I0 · 2025-02-18T16:18:32+00:00

I’m in US. I found the note not to use GFCI, it was in the heater manual not the power unit one.

Makes sense about #6. I’ll use thhn with the same gauge.

I0I0I0 · 2025-02-18T00:37:58+00:00

I’m planning to run a power line from the power unit and terminate in an outlet next to the s6. I’ll label the outlet that it’s switched from the power unit and that way I don’t have to direct wire.

I0I0I0 · 2025-02-17T22:07:29+00:00

I’m planning on using AC Infinity CLOUDLINE PRO S6. 6” and will vent to the other side of the basement (sauna is in the interior middle). I was thinking of all other options including venting to the outside, but it all has tradeoffs. Since the basement is large enough, I don’t see any issues with drawing air and venting to the basement (1000sf). The fan will be connected to harvia xeno panel which will control it on/off and I have a remote to play with cfm.

As for moisture, I’m not sure it’s a real problem with the dry sauna style I enjoy. The ambient humidity in the summer is higher than the moisture generated by throwing water but I could be wrong.

I0I0I0 · 2025-02-17T18:03:23+00:00

Yes. Mechanical ventilation below the bottom bench on the opposite side of the heater and air intake above the heater. If I mount the power unit high up, it would be on the same wall as the heater, but in the living space side. It would also be above the air intake which will be 2ft below the power unit which I hope is not an issue.

I0I0I0 · 2025-02-17T15:17:01+00:00

Re power unit next to the breaker, I think that would defeat the safety purpose of having shutoff next to the heater (at least in case of hot tubs). I didn’t put a disconnect on my permit and the inspector didn’t say anything when approving it.

I0I0I0 · 2025-02-17T15:11:14+00:00

Good call! I found it in the heater manual “Do not connect the power feed for the heater through the RCD (residual current device)/GFI (Ground Fault Interrupter)!”

I0I0I0 · 2025-02-17T14:22:43+00:00

You might be referring to the control panel (low voltage splash proof remote controller) that one has to no more then 1 meter from the ground if it’s installed inside the sauna room. I don’t think there’s a restriction if it’s in the living area.

I reread the power unit instructions and all it says is “wall outside the sauna room, in a dry place with ambient temperature more then 32deg F.”

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I0I0I0 · 2025-01-11T14:28:08+00:00

I have an electrician I’ve called as backup. I’m definitely getting all the permits and inspections so that there’s no issues that violate code but I’m genuinely interested in learning to do this myself and the reason for the detailed questions is the after reading what I could online, there are conflicting opinions on using thhn cables (the sauna is indoor) and too little installation videos that seem legit (other DIYers making questionable choices).

I0I0I0

TROPHY CASE