What is the difference between a spa and a whirlpool bathtub?
Spa or whirlpool bathtub: which one should you choose to create a true relaxation space at home?
Both of these systems are based on the principle of a whirlpool bath, using hot water and hydromassage jets to offer a relaxing experience at home. However, even though they may seem similar, spas and whirlpool bathtubs serve very different purposes.
Between spa systems (outdoor, portable, inflatable…, also known as jacuzzi) and whirlpool bathtubs installed in the bathroom, there are now many options available for individuals who want to enjoy the benefits of hydrotherapy.
In this guide, discover:
- The difference between a spa and a whirlpool bathtub
- How to choose the right equipment for your home
- The advantages and disadvantages of each solution
- Their size, installation and consumption
The goal: to help you make the best choice for your home relaxation project.
Spa or whirlpool bathtub: the main differences
Here are the main differences between a spa and a whirlpool bathtub to help you identify the equipment best suited to your project.
| Criteria | Spa | Whirlpool bathtub |
|---|---|---|
| Use | group relaxation | individual bath |
| Number of people | 4 to 8 people | 1 to 2 people |
| Location | garden, terrace or indoors | bathroom |
| Installation | more complex | similar to a bathtub |
| Maintenance | water filtration and treatment | simple maintenance |
| Average price | €3000 to €15000 (for a fixed spa) | €800 to €4000 |
What is the difference between a spa and a whirlpool bathtub?
The first difference between a spa and a whirlpool bathtub concerns their use, their size and their operation.
The whirlpool bathtub, also called a hydrotherapy bathtub or hydromassage bathtub, is a classic bathtub equipped with a water jet system and sometimes an air system.
These hydromassage jets, positioned on the sides and bottom of the bathtub, create currents, bubbles and a massaging effect in hot water, offering a moment of relaxation and care.
It is generally installed in the bathroom, like a traditional bathtub, and allows a relaxing bath for one person or for two.
The spa, often called a jacuzzi (a name derived from the historical brand created by Roy Jacuzzi), is a whirlpool basin designed to accommodate several people.
It can be:
- an outdoor spa in a garden
- installed on a terrace
- placed in a dedicated indoor space
Unlike a bathtub, the water in a spa remains in the basin and is continuously filtered and treated thanks to a filtration and heating system that maintains the water temperature.
How to choose between a spa and a whirlpool bathtub?
The choice mainly depends on three factors: space, budget and usage.
Available space
A whirlpool bathtub is designed to be installed in a bathroom, just like a traditional bathtub. It is therefore perfectly suited to homes or apartments where space is limited.
A spa, on the other hand, generally requires more space. It can be installed:
- in a garden
- on a terrace
- in a dedicated room
However, some models such as portable or inflatable spas allow for easier and temporary installation.
Number of users
The whirlpool bathtub is generally designed for one person or for a duo bath.
The spa, on the other hand, is designed to accommodate several people. Depending on the size of the basin, it can hold 4 to 8 people, making it a true relaxation space for family or friends.
Budget
The price is an important factor in the decision.
A mid-range whirlpool bathtub generally costs between €1400 and €2000, depending on the brand, options and design.
A spa, especially a high-end model, can cost several thousand euros. The total cost often includes:
- the spa itself
- installation
- the filtration system
- water heating
- electrical supply
It is therefore recommended to request a quote from a professional before starting your project.
What are the advantages of a whirlpool bathtub?
The whirlpool bathtub offers several advantages for individuals who want to enjoy the benefits of hydrotherapy without installing a spa.
A relatively simple installation
In most cases, a whirlpool bathtub replaces a traditional bathtub. It requires:
- a water supply
- a drainage system
- an electrical connection (note: dedicated circuit, residual current device and technical access)
- sometimes plumbing adjustments
The installation can be carried out during bathroom renovation work.
A massage experience at home
The operation of a whirlpool bathtub is quite simple. Once filled with hot water, an electric pump sends water to the jets located on the sides. Hydromassage jets and air bubbles create a bubbling bath that provides a relaxing massage.
These water jets create:
- currents
- a bubbling bath
- a massaging effect
Some models combine two technologies:
- Air system: injection of bubbles using a blower.
- Air-water system: mixture of air and water for a more powerful hydromassage.
The hydromassage jets can be adjusted according to position, intensity or the area of the body to be massaged. They can target different zones: back, legs, neck, feet…
This bath session promotes muscle relaxation and recovery after a day of work.
Simple maintenance
Unlike a spa, the water in the bathtub is renewed after each bath.
There is therefore no complex filtration system or continuous water treatment, which simplifies both use and maintenance.
What size is a spa compared to a whirlpool bathtub?
The size is a major difference between these two types of equipment.
A whirlpool bathtub generally has dimensions similar to a traditional bathtub:
- length: 160 to 190 cm
- capacity: 150 to 300 liters
It remains compact and suitable for a standard bathroom.
A spa, on the other hand, is much larger.
Depending on the model, its capacity can reach:
- 800 to 2000 liters
- 4 to 8 people
This size requires a solid floor, a suitable location and sometimes construction work for installation.
How much do a spa and a whirlpool bathtub consume?
Energy consumption is often an important consideration for homeowners.
Spa consumption
A spa keeps the water hot continuously, typically between 35 and 38°C.
Consumption depends on insulation, frequency of use, outdoor temperature and heating system… but on average, a well-insulated spa represents €300 to €800 in electricity per year.
Whirlpool bathtub consumption
A whirlpool bathtub operates only during the duration of the bath.
Consumption comes from:
- the hydromassage pump
- the blower
- the hot water used
It is therefore generally lower than that of a spa.
What are the disadvantages of a spa?
Despite its many advantages, a spa also has some constraints.
A higher cost
Purchasing a spa represents a larger investment than a whirlpool bathtub.
Between equipment, installation and maintenance, the budget can quickly reach several thousand euros.
Regular maintenance
The basin must maintain good water quality through:
- a filtration system
- water treatment
- regular cleaning of the jets
Higher energy consumption
Maintaining the water temperature results in a higher energy consumption than a bathtub.
Spa or whirlpool bathtub: which one to choose depending on your situation?
To summarize:
Choose a whirlpool bathtub if:
- you have a standard bathroom
- you want a relaxing individual bath
- your budget is limited
- you want simple maintenance
Choose a spa if:
- you want to create a true relaxation space
- you have a garden or terrace
- you want to share the experience with family or friends
- you are looking for a high-end solution
FAQ: Spa and whirlpool bathtub
Does a spa consume a lot of electricity?
Yes, a spa generally consumes more electricity than a whirlpool bathtub, as it keeps the water hot continuously using a heating and filtration system. The average consumption is often between €250 and €500 per year, depending on usage and insulation.
A whirlpool bathtub, on the other hand, operates only during the bath. The hydromassage jets are activated for only a few minutes, which limits energy consumption.
Can a spa be installed on a terrace?
Yes, a spa can be installed on a terrace or in a garden, provided that the floor is strong enough to support the weight of the filled basin and its users.
A whirlpool bathtub, on the other hand, is generally installed in a bathroom like a standard bathtub, requiring fewer technical constraints.
Does a whirlpool bathtub require special maintenance?
Maintenance of a whirlpool bathtub is simple. It is enough to clean the jets and rinse the system regularly.
A spa, on the other hand, requires more frequent maintenance, as the water remains in the basin for several weeks and must be filtered and treated.
What is the lifespan of a spa?
A high-quality spa can last on average 10 to 15 years, provided it is well maintained and its filtration and heating systems are regularly checked.
A whirlpool bathtub can last longer, often over 15 years, as its system is simpler and used only during baths.
Why is a spa sometimes called a “jacuzzi”?
The term jacuzzi originally comes from an American brand founded by Roy Jacuzzi, who developed the first hydromassage systems. Over time, the brand name became a common term used to refer to a spa. This is called antonomasia: when a brand name becomes the name of an entire product category.
Today, people often use “jacuzzi” to refer to a spa, even if it is not manufactured by the Jacuzzi brand. The same applies to brands like Frigidaire, Velcro, Kärcher or Scotch.
