Hot Tub vs Sauna: How They Differ, and Why Owners Build Both
A hot tub and a sauna are not rivals. A sauna gives intense, dry heat in short rounds; a hot tub gives gentler, wet heat for long, unhurried soaks. If you can only have one, choose by how you like to spend the time. If you can have both, put them a few steps apart and add something cold in between.
More and more of the owners we hear from are building the two together, at home and at guest properties. Here is how they compare, and how to plan them side by side.
Hot tub vs sauna: how they differ
| Sauna | Hot tub | |
|---|---|---|
| Heat | Hot, dry air, usually 160 to 195°F (70 to 90°C) | Water at 101 to 104°F (38 to 40°C) |
| Typical session | Short rounds, often 10 to 15 minutes | Longer, often 20 to 40 minutes |
| Feel | Intense, quiet, inward | Weightless, sociable, outward to the view |
| Best in | Any weather | Any weather, and best on a cold night |
| Upkeep | Sweeping, airing, occasional bench care | Water care and seasonal attention |
The sauna is concentrated: a few minutes of deep heat, then out. The hot tub is expansive. Water takes the weight off, conversation comes easily, and on a round tub everyone faces each other with the view running all the way around.
Choosing one: the deciding questions
How do you want to spend the time? If the appeal is a short, intense ritual alone or with one other person, a sauna. If it is long evenings with family or friends, a hot tub.
Who will use it? Children and older guests often find a hot tub more comfortable than sauna heat.
What does the property offer? A lake, the ocean or a cold shower makes the sauna ritual complete. A view makes a hot tub. Both work without power if they burn wood: see a hot tub without electricity.
Why owners end up with both
The two fill each other's gaps. The sauna does the deep heat quickly, the cold resets, and the hot tub is where people settle and stay. That rhythm of hot, cold and warm water is centuries old, from Finnish lakeside saunas to Japanese bathing culture, which we write about in an onsen style bath at home.
At The Narrows in Minnesota, a cedar sauna with a glass wall on the lake sits beside an Electric AlumiTub sunk into the deck. At Camp Moose Trail near Golden, the wood fired tub and the sauna cabin were deliberately placed together. In the Northwest Territories, Mary Tapsell imagined a hot tub and sauna overlooking the lake from the day she built her cabin, a story told in off-grid in the cold.
Adding the cold
A cold plunge, a lake, or simply a cold shower between the sauna and the tub is what turns two heat sources into a ritual. Hot tub and cold plunge covers the practice, and why colder isn't always better covers the temperatures.
Planning a sauna and hot tub together
Distance and paths
Plan for a few steps between them on a level, non-slip path, ideally one that stays clear in snow. Somewhere to sit or lie down in between matters more than people expect.
Smoke and chimneys
With wood burning in both, think about where the smoke goes. Owners on Read Island were advised by neighbors to keep smoke blowing away from sitting areas and windows, which is good advice for any layout; their story has more siting wisdom. A wood fired AlumiTub needs about 10 ft (3 m) of vertical clearance above the chimney cap and no structure or flammable material close by.
Firewood
Both burn the same dry, seasoned hardwood, so one covered woodpile can serve both. The best firewood covers what to burn.
Power, if you are using it
An electric sauna heater and an Electric or Hybrid hot tub each need their own dedicated circuit. Plan both with your electrician at the same time. Installation options covers how the tub's equipment can be placed.
Base and drainage
The tub needs a flat, level base rated for its filled weight, and both structures need somewhere for water to drain away. Preparing for delivery covers the tub side.
A note on safety
Heat is wonderful in moderation. Keep sessions short, drink water between rounds, skip alcohol, and step out if you feel lightheaded. Anyone pregnant, with a heart or blood pressure condition, or on medication that affects either, should check with their doctor first.
Common questions
Is a hot tub or a sauna better?
Neither is better; they do different things. A sauna surrounds you with dry heat, usually 160 to 195°F (70 to 90°C), for short sessions. A hot tub holds you in water at 101 to 104°F (38 to 40°C) for longer, slower soaks and conversation. Many people find the two work best together, with a cold plunge or a cool rinse in between.
What order should you use a sauna and hot tub in?
A common rhythm is sauna first, then a cold plunge or cool rinse, then a rest or a long soak in the hot tub. Others finish in the sauna. There is no single right order. Keep sessions short, drink water between rounds, and stop if you feel dizzy or unwell.
How far apart should a sauna and hot tub be?
Close enough to walk between barefoot in the cold, far enough that each keeps its own clearances. A few steps along a level path is ideal. With a wood fired tub and a wood burning sauna, plan both chimneys so smoke drifts away from doors, windows and seating, and keep the tub's chimney clear of any overhang.
Can a wood fired hot tub and a wood sauna share firewood?
Yes. Both burn the same dry, seasoned hardwood, so one covered woodpile can serve both. Store it a little away from the cedar of either structure, and keep it dry. Wet wood spends its energy boiling off moisture, which slows down a sauna and a tub alike.
Is it safe to use a sauna and hot tub together?
For most healthy adults, yes, in moderation. Keep sessions short, stay hydrated, and avoid alcohol. People who are pregnant, have heart or blood pressure conditions, or take medication affecting either should ask their doctor first. Children should be supervised and use lower temperatures and shorter sessions.