Steam Room vs Hot Tub, Jacuzzi & Whirlpool Compared

Short answer

A steam room is a sealed, tiled room filled with steam, set to about 80 to 120°F at home. A hot tub, also called a spa or Jacuzzi (a brand name), holds water that should not exceed 104°F. A whirlpool is usually an indoor bathtub with jets. Our sources show no health winner, so choose by comfort, cost and upkeep.

Steam rooms, hot tubs, Jacuzzis and whirlpools all use heat and water, but in very different ways. Here is how they compare on temperature, setup, cost, upkeep and safety, based on manufacturer manuals, public health agencies and cost guides.

Table of Contents

What is the difference?

Steam room or steam shower: a fully enclosed room where a generator boils water and pumps steam inside. You sit in hot, humid air. (MrSteam)
Hot tub or spa: a large tub of hot water for soaking, not bathing, kept filled and treated with a disinfectant. Many have jets. (King County Public Health)
Jacuzzi: a brand name. People often use it for any hot tub or spa.
Whirlpool: HomeGuide uses the term for an indoor bathtub with jets. Some people and agencies also use it as another name for a hot tub. (HomeGuide)

Steam room vs hot tub vs whirlpool tub at a glance

Comparison (sources linked below, checked 20.10.2026)
Feature	Steam room / steam shower	Hot tub / spa / Jacuzzi	Whirlpool bathtub
Heat	Hot, humid air; MrSteam iTempo control 80 to 120°F, default 110°F	Hot water, no higher than 104°F (CDC, CPSC)	Bath water you fill yourself
Session	10 to 15 minutes until you know how your body reacts (MrSteam)	Up to 15 to 20 minutes at 104°F (King County)	Like a normal bath
Water care	Flush the generator tank about every 2 months (MrSteam)	Chlorine at least 3 ppm or bromine 4 to 8 ppm, pH 7.0 to 7.8 (CDC); clean monthly, drain 3 to 4 times a year (HomeGuide)	Fresh water each time
Home cost	Prefab steam room $2,800 to $7,000 installed; custom $4,000 to $14,000+ (HomeGuide)	$2,000 to $18,000; inflatable $400 to $1,500 (HomeGuide)	Not covered by our sources
Running cost	About $40 to $60 a month for water, plus energy (HomeGuide)	About $20 to $30 a month above ground, $30 to $100 in-ground (HomeGuide)	Not covered by our sources
Setup	Sealed, waterproof stall with a sloped ceiling and floor drain; 208 or 240 V generator (MrSteam)	Indoor or outdoor; entry-level models can plug into a 120 V outlet (HomeGuide)	Fits in a bathroom

How hot does each get?

A home steam room is set by its control. The MrSteam iTempo manual lets you choose 80 to 120°F in one-degree steps, starts at 110°F by default, and recommends starting at a low setting for a short time.

For hot tubs, the CDC says the water should not be higher than 104°F (40°C). The Consumer Product Safety Commission also says never to exceed 104°F, calls 100°F safe for a healthy adult, and warns that soaking at 106°F can raise body temperature to the point of heat stroke. Hot tub thermostats can be off by as much as four degrees, so check with an accurate thermometer.

For comparison, Cleveland Clinic puts traditional saunas at about 150 to 195°F and infrared saunas at about 110 to 135°F. See how hot saunas and steam rooms get.

What about health benefits?

Many people use all of these to relax. Our older version of this article claimed that steam rooms are best for weight loss, that all four prevent strokes and heart attacks, that hot tubs improve insulin sensitivity, raise growth hormone and reduce lactic acid, and that sweating removes heavy metals. We removed these claims because the sources we checked do not support them.

The CPSC advises people with heart disease, circulation problems, diabetes or blood pressure problems to ask their doctor before using a hot tub. If sore muscles are your main reason, see sauna or hot tub for sore muscles.

Hygiene: water vs steam

Hot tub water is shared and warm, so it needs disinfectant. The CDC says germs in hot tub water can cause respiratory, skin and stomach illnesses. Its advice: shower before you get in, do not swallow the water, stay out if you have diarrhea, and check the chlorine or bromine and pH with test strips. A properly treated hot tub has little odor; a strong chemical smell means there is a problem.

A steam room has no standing water to treat, but surfaces stay wet. MrSteam warns that wet floors can be slippery and that the steam head is hot and should not be touched. See steam room vs hot shower.

Safety rules for all of them

Skip alcohol before and during use. The CDC says not to drink alcohol before or during hot tub use, and the CPSC warns that drowsiness can lead to drowning.
Do not let children under 5 use hot tubs (CDC). MrSteam says to supervise children at all times in steam rooms.
If you are pregnant, talk to your doctor first. ACOG says it is best not to use saunas and hot tubs early in pregnancy.
Avoid hot tubs if you take medicine that makes you drowsy (CPSC).
Keep sessions short, drink water, and get out if you feel dizzy, sick or unwell.

Which should you choose?

A steam room may suit you if

You like hot, humid air and short sessions.
You are remodeling a bathroom and can build a sealed, waterproof shower with a drain.
You do not want to manage pool chemicals.

A hot tub or spa may suit you if

You like to soak, float and sit with others.
You have space indoors or outside and can test and treat the water regularly.
You want an entry-level option: HomeGuide lists inflatable hot tubs from about $400.

A whirlpool tub may suit you if

You want jets in your own bathtub and fresh water each time.

Comparing with a sauna instead? See sauna vs hot tub, sauna before or after the hot tub, infrared sauna vs steam room and how often and how long to use a steam room.

Frequently asked questions

Is a steam room better than a hot tub?

Neither is better overall. A steam room gives hotter, humid air for short sessions and needs a sealed, tiled room with a drain. A hot tub lets you soak at up to 104°F and needs regular water care. Pick the one you enjoy and can maintain.

What is the difference between a hot tub and a Jacuzzi?

There is no real difference. Jacuzzi is a brand name that many people use for any hot tub or spa. King County Public Health notes that hot tubs and spas are also called whirlpools or Jacuzzis.

What is the difference between a hot tub and a whirlpool tub?

A hot tub or spa holds heated water for soaking and is kept filled and treated. A whirlpool tub, in the HomeGuide definition, is an indoor bathtub with jets. Some people also use whirlpool as another name for a hot tub.

Which is hotter, a steam room or a hot tub?

A steam room. MrSteam’s iTempo control lets you set the steam from 80 to 120°F, with 110°F as the default. Hot tub water should not be above 104°F, according to the CDC and CPSC.

Is a steam room or hot tub better for weight loss?

Neither should be used as a weight-loss tool. We removed earlier claims that steam rooms are best for weight loss or detox, because the sources we checked do not support them.

How long should you stay in a steam room or hot tub?

MrSteam advises limiting steam to 10 to 15 minutes until you know how your body reacts. King County Public Health suggests a maximum of 15 to 20 minutes in a hot tub at 104°F. Get out sooner if you feel dizzy or unwell.

Sources

This comparison is based on the linked manuals, health agencies and cost guides, checked on October 20, 2026. We did not test products ourselves. It is general information, not medical advice.