Sauna Exterior Entry Door-- Inswing or Outswing?

 When I built my outdoor wood fired sauna, now about 10 years ago, I didn't give the exterior entry door too much thought. I knew I wanted it to be glass for that sauna/spa feel, but other than that, I just wanted to keep the cost down. Once the sauna was built and getting used, something about the front door really annoyed me. 

My sauna is 12 feet by 14 feet. It has a 6 x 12 hot room and an 8 x 12 changing/hangout room. I also have a TV hanging on the wall where the entry door is. In the summer, we keep the entry door open because it gets hot in the changing room. That means the door is blocking the TV. Other times, when we have more than a couple of people in the changing room, every time someone comes in or goes out, they end up hitting someone standing by the door. After many years, it has become really annoying.

Inswing Sauna Entry Door

Now, enter the outswing door. After doing some research, I learned that there are doors available that swing out to the exterior instead of inside of the building. These doors are available, but they're special order. Takes about a week to make. Having a door that swings outside, would solve my blocking TV problem, my hitting people in the back problem, and a bonus problem of, in case of emergency, the door can easily be kicked out if I need to escape. 

I was worried about cost. Entry doors go up in price very fast. However, I was able to get a pre-hung outswing door from Menards and paid about $400 for it (in 2026). Add the fact that I carefully removed my old front door, I was able to sell it as pre-hung used door for $150 on Marketplace. Overall, a very good upgrade at a palatable cost. 

Outswing Sauna Entry Door

When planning/building your sauna, be sure to give an outswing entry door a serious thought!

Sauna afterburn-- feeling hot for hours after a good sauna

 I take my saunas in the evening after work. I live in a cold climate with winters-- Minnesota, USA. My sauna ritual is to have friends over to socialize, drink beer, eat food and, of course, sauna. We do 4-6 rounds on average, each round taking 5-10 minutes, depending on the temperature. Some days our sauna is at 190F. Some days 210F. We have a changing room with a table, snacks and beer. Between rounds, we cool down and talk in the changing room. Once we're done for the night, I clean up, shower and go to bed.

I have noticed, several times, that when I go to bed afterwards, the house that may usually feel cooler in the winter, all of the sudden feels warmer. Almost to the point where if I lived alone, I'd lower the thermostat setting. In the morning, when I wake up, I still feel like the environment around me is warmer. This only happens after taking sauna. Somehow, the sauna must truly heat you through to the bone. I don't know where to find a scientific explanation for why this happens, but if you have ideas, let me know in the comments section.

Asking chatGPT for the reasoning, we get this:

What you're describing is actually pretty common after heavy sauna use. A few things are happening physiologically:

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1️⃣ Your Core Temperature Stays Slightly Elevated

After multiple sauna rounds, your body temperature doesn’t instantly return to baseline. Your thermoregulation system stays slightly “turned up” for hours.

That means:

• Your resting core temp may be a bit higher

• You feel warm in environments that normally feel neutral

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2️⃣ Blood Vessels Stay Dilated (Vasodilation)

Sauna causes strong vasodilation — blood vessels widen to dump heat.

That effect can linger into the night and even the next day, which:

• Increases blood flow to the skin

• Makes you feel warmer at normal room temperature

• Can make you more heat-sensitive

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3️⃣ Nervous System Activation

Sauna is a controlled stressor. It activates:

• Sympathetic nervous system (during heat exposure)

• Then parasympathetic rebound afterward

Your temperature regulation center (hypothalamus) can temporarily recalibrate, making typical room temps feel warmer than usual.

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4️⃣ Mild Dehydration

Even if you rehydrate, you may still be slightly low on fluids or electrolytes.

Dehydration:

• Reduces your ability to cool efficiently

• Makes you feel warmer more easily

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5️⃣ Increased Metabolic Rate (Short-Term)

Heat exposure can temporarily elevate heart rate and metabolic activity. A slightly elevated metabolism produces more internal heat.

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Is This Normal?

Yes — as long as you don’t have:

• Fever

• Chills

• Persistent night sweats

• Dizziness or rapid heartbeat

If it’s just “the house feels warmer than usual,” that’s typically just lingering thermoregulation effects.

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Quick Fixes

• Aggressive hydration + electrolytes

• Cool (not cold) shower

• Light movement the next day

• Avoid stacking multiple long sauna sessions back-to-back