Anyone thinking about warm water in their own garden sooner or later arrives at the same question: is a classic hot tub enough, or should it be a swim spa right away? Both variants have their merits, and both can bring joy for many years – provided they suit what you really plan to do with them in everyday life. The following seven questions will help you sort out your decision before buying. There is no “better” or “worse”, only “suits me” or “doesn’t”.
In brief: what is the difference?
A hot tub (also called a spa or whirlpool) is a heated tub with seats, loungers and massage jets. The focus is on relaxation, warmth and massage. Compact dimensions are typical, fitting on a patio or in a smaller garden.
A swim spa is considerably longer. It combines an area for swimming or training against an artificial current with – depending on the model – an area for sitting and relaxing. It is thus a kind of cross between a small pool and a hot tub.
Question 1: what do you mainly want to use the water for?
This is the most important question of all. Be honest with yourself:
- Relaxing, warmth, massage, evenings together: that is what a hot tub is built for. Seating position, jets and water temperature are designed for it.
- Swimming or doing aqua fitness regularly: this is where the swim spa plays to its strengths. The counter-current system allows exercise in a small space.
- Both, but sport only occasionally: then it is worth taking a close look. Some opt for a swim spa with an integrated seating area; others realise they would use the swimming function less often than expected.
A good test: think about what your typical week looks like. If you mainly see yourself in warm water in the evening after work, there is a lot to be said for a hot tub.
Question 2: how much space do you have – and how will the tub get there?
A swim spa needs considerably more floor space than a hot tub. On top of that comes space all around: for access, the cover, the service panel and comfortable entry and exit.
At least as important is the route to the installation site. Swim spas are delivered in one piece. If the access route doesn’t fit, a crane is often needed. So measure gates, passageways and bottlenecks before buying and clarify with the dealer how the delivery will work. With a hot tub this is usually easier, but here too: better to measure once more.
Question 3: what can the base support?
Filled with water, both variants place considerable weight on the surface – a swim spa many times more because of its larger water volume. A level, load-bearing base is therefore mandatory, usually a base slab or a suitably prepared foundation. On patios, timber decks or even balconies, a structural engineer should always check the load-bearing capacity beforehand. The exact requirements are in the data sheet of the respective model.
Question 4: what is your budget – one-off and ongoing?
In terms of purchase price, a swim spa is as a rule considerably more expensive than a hot tub. But you should also plan for the additional costs in advance:
- Foundation or base slab
- Electrical connection by a qualified contractor
- Delivery, possibly by crane
- Accessories such as steps, cover lifter or water care starter kit
On top of that come running costs for electricity, water and care products. Because a swim spa heats more water, these are usually higher. Roughly how much this amounts to per month depends heavily on insulation, usage and location. Spa Natural’s guide to the monthly costs of a hot tub provides a good overview.
Question 5: who will bathe with you?
For couples or small families, a compact hot tub is often enough. Those who regularly have guests should pay more attention to the number and layout of the seats. A swim spa offers a lot of water surface, but not automatically more comfortable seats – that depends on the model. For families with children, the extra space to move in a swim spa can be a real plus. But also think about safety: a lockable cover makes sense for both variants.
Question 6: how much maintenance effort do you want?
The basic principles of water care are the same for both: test water values, sanitise, clean filters, change the water regularly. In a swim spa the water volume is larger, so the values react somewhat more slowly, but larger quantities are needed for water changes and dosing. Before buying, have the dealer show you exactly how water care works for the model in question and which systems (such as ozone or UV-C) are installed to support it.
Question 7: have you seen both variants live?
No brochure replaces your own feel in the water. How does the current in the swim spa feel? Is it comfortable for your swimming pace? Does the seating position in the hot tub suit your height? Many dealers offer the chance to view models in the showroom. That is the best opportunity to clarify open questions directly.
Rule of thumb to finish
- Hot tub: if relaxation, warmth and massage are the priority, space is limited and the budget should stay manageable.
- Swim spa: if you want to swim or train regularly, have enough space and good access, and can plan for a higher budget.
If you want both and are unsure, look at the models side by side. An overview of the options can be found among the swim spas from Spa Natural, where you can compare sizes and features directly.
Frequently asked questions
Can you really swim in a swim spa?
You swim on the spot against a current. How well this works depends on the counter-current system and the length of the pool. It is best to try it yourself before buying.
Is a swim spa also suitable for relaxing?
Yes, many models have a seating area with massage jets. The comfort of a dedicated hot tub is not always fully reached – this depends on the model.
Which is cheaper to maintain?
As a rule the hot tub, because less water has to be heated and cared for. Actual costs, however, depend heavily on insulation, cover and usage.
Do I need a three-phase connection for both?
That depends on the model. Many units run on 400 V; some smaller hot tubs also on 230 V. The connection should always be made by a qualified electrical contractor.
Can I switch from a hot tub to a swim spa later?
It is possible, but usually involves a new foundation and an adapted power supply. That is why careful consideration before the first purchase pays off.
INFINITAS editorial team, in cooperation with the dealer Spa Natural, Hilden, Germany.