How many people does a six-person tub really seat?
The first thing to understand is that, as with every inflatable hot tub, the headline figure is the squeeze-in maximum, not the comfortable number. A tub sold as six-person comfortably seats four adults with room to stretch, and six when everyone is happy to sit close. The two genuine six-seaters we recommend are the Lay-Z-Spa Paris at 196 cm and 800 L and the larger MSpa Comfort Bergen at 204 cm and 930 L. The Bergen, with the most water of any tub on test, comes closest to seating six adults without elbows clashing, while the value CleverSpa Maevea at 795 L is a comfortable four-to-six tub for the money.
Seat depth matters as much as diameter. A tub with shallow seats leaves taller users with their shoulders out of the water, so the experience feels colder than the temperature suggests. On test, the deeper, more sculpted floors of the Paris and the Bergen kept more of the body submerged, which is part of why they feel like proper six-person tubs rather than four-person tubs with optimistic marketing. If you regularly host larger groups, prioritise the genuinely larger volume of the Bergen; if four is your usual number with the option of six, the Paris is the sweeter spot.
Do six-person tubs cost a lot more to run?
They cost somewhat more than a small tub, and the reason is simply that there is more water to heat and keep warm. On our tests the six-person tubs cost roughly £42 to £48 a month to run over a mild month, against about £34 for the small two-to-four person Wave Spa Atlantic. The gap is not huge if you insulate well, but it is real and it compounds over a season. The cheapest big tub to run on test was the Lay-Z-Spa Paris at about £42, thanks to the best heat retention we measured (1.4°C an hour lost with the lid on); the dearest was the larger 930 L MSpa Comfort Bergen at about £48, because it holds the most water.
The honest question to ask is how often you will actually fill all six seats. If the answer is most weeks, a six-person tub makes sense and the cost per person is reasonable. If the answer is once or twice a year, you are paying every month to heat water you rarely use, and a four-person tub like the Bestway Lay-Z-Spa Bali or a small couple's tub will save you money. The same insulation rules apply whatever the size: keep the lid on, use an insulating ground mat and site the tub out of the wind. Our running costs guide sets out the savings in detail.
Space, ground and siting
A six-person tub needs room and a solid base. The tubs here are around 196 to 204 cm across inflated, so you need a flat, level area of at least roughly 2.6 by 2.6 metres to allow space to climb in and out comfortably. Just as important is what the tub stands on: filled with water and people, a six-person tub can weigh well over a tonne, so the surface must be load-bearing and level. A patio, a reinforced decking area or a purpose-built base is ideal; soft or sloping ground is not. Always stand the tub on an insulating ground mat, both to protect the base from cold and sharp stones and to cut heat loss into the ground.
Think about access to power and water too. The pump-heater plugs into a standard outdoor-rated socket on its own RCD-protected circuit, in line with the kind of wiring guidance set out in the IET Wiring Regulations (BS 7671) for outdoor electrical equipment, and you will fill the tub from a garden hose, which takes 45 to 90 minutes for a six-person volume. Site the tub where you can reach both easily, and where the cover is out of the worst of the wind, since wind strips heat from the water surface faster than still cold air.
Which six-person tub should you buy?
For most buyers the Lay-Z-Spa Paris is the best six-person inflatable hot tub: it held its heat better than anything else on test, which makes it the cheapest big tub to run, and it pairs a strong 2,050 W heater with even AirJet bubbles and LED lighting, all for around £550. If you want the most solid, spacious tub and lower chemical use, the MSpa Comfort Bergen adds a rigid frame, the largest 930 L volume and a built-in UVC steriliser for around £600, at the cost of the highest running bill here. And if you want six seats for the least money, the CleverSpa Maevea delivers them with Wi-Fi app control for about £400, provided you accept a slower heat-up.