A real hot tub, out of the box, on a standard plug.

An inflatable hot tub is the quickest, cheapest way into the category — and for plenty of buyers, it's the right way in, not a compromise. The honest buying question is matching the tub to how you'll actually use it. This guide walks through the things worth thinking about before you hit order.

Canadian Spa vs the high-street end of the market

Most of what's marketed as an inflatable hot tub on the UK high street is a bubble-walled paddling pool with a heater bolted on. That works — up to a point — but the category limits people write about (can't hold heat in winter, shallow soak, short lifespan) are largely limits of that specification, not the category itself.

What the Canadian Spa inflatables do differently:

• A real vinyl insulation layer wrapped around the body — not a two-tone plastic panel printed to look insulated. You can feel the difference on a December evening.
• 74cm of depth. Enough to actually submerge neck and shoulders (most bubble tubs only get you chest-deep), and less exposed water surface per litre inside — so less heat loss through the top.
• A cartridge filtration cycle, chlorine/bromine dosing and water-care logic that matches how a hard-shell spa is run.
• UK stock, UK support, and a 12-month manufacturer warranty handled from Redhill, Surrey — not an email address that goes to a reseller you've never heard of.

Why we sell a 2+2 family tub, not a 6-person one

A lot of the inflatable category competes on seat count — "six-person hot tub!" on the box — and the running-cost bill lands a month later. The physics are straightforward: the bigger the tub, the more surface area across the top for heat to escape through. Inflatable lids and walls are thin compared to a foamed acrylic spa, so that exposed area loses heat fast; the heater then has to fight the cold continuously just to hold 38°C.

Our current inflatable, the Grand Rapids, is sized for 2 adults and 2 young children — a deliberate decision. A family-footprint tub with a real vinyl wrap and 74cm depth holds temperature cleanly and runs on a sensible electricity bill. If you genuinely need a tub for 4+ adults regularly, the honest answer isn't a bigger inflatable; it's a hard-shell acrylic spa, where the insulation package is designed to carry that surface area. We'd rather point you there than sell you a tub that hurts to run.

Inflatable vs hard-shell — which one are you actually shopping for?

Some useful rules of thumb:

• Inflatable is the right answer if: you rent and can't commission a bespoke spa platform; you want the option to pack it away later; you're testing whether a hot tub routine suits your life; your budget is under £1,500 and you'd rather own a real tub than finance a hard-shell; or a jet-therapy massage is not the main reason you want a tub. Year-round use is on the table too, thanks to the insulation and depth.
• A hard-shell is the right answer if: jet-therapy hydrotherapy for muscles, back or joints is the main reason you're buying; you want the tub to last 10+ years and be a patio fixture; you want the absolute lowest year-round running cost; or multiple adults will use it several times a week across a full decade.

There is no hierarchy here — the two categories solve different problems. We sell both. We're happy to tell you when an inflatable is the better choice, and equally happy to tell you when it isn't.

Realistic running costs at current UK tariffs

Hot tub running cost advice on the internet is mostly out of date — most of it was written when UK electricity was half what it is now. Today's honest figures for a Canadian Spa inflatable at 38°C:

• Spring, summer, early autumn: around £3–£5 per day on our Grand Rapids (2 adults + 2 children), based on customer feedback. Warmer months at the low end.
• Winter: rises during the coldest weeks of December and January, but the vinyl insulation wrap and 74cm depth keep it meaningfully below what a bubble-walled competitor tub consumes at the same set point. Year-round averages depend on how cold a winter you get and how often you're in the tub.
• Hard-shell acrylic spa, year-round: around £2–£2.50 per day at current tariffs. The foamed cabinet and 5″ tapered cover are engineered to be the most efficient answer over a full year of continuous use.

These are ranges, not guarantees — specific consumption depends on ambient temperature, how often the cover's off, how hot you run it, and your electricity unit rate. But they're the ranges we hear back from real customers, not optimistic lab numbers.

The base you put it on matters more than the tub

Filled with water and people, the Grand Rapids inflatable weighs about two tonnes. That needs a proper base — not just somewhere flat. Work from these rules:

• An existing level, load-bearing patio. Concrete, smooth close-jointed paving slabs, or a purpose-built hot-tub base pad all qualify. The tub is not going on grass directly — it'll sink, the base fabric tears on stones, and water pools around the feet.
• Decking, only if the structure is genuinely strong enough. Useful rule of thumb: if you'd be comfortable seeing 15–20 grown men standing in the same patch of your deck at once, it can take the spa. If the answer is "probably not," put the tub on the patio instead, or have the decking reinforced before delivery. Most domestic garden decking wasn't built with hot-tub loads in mind.
• Level matters. An inflatable tub on a slope fills unevenly, stresses one side of the liner, and looks wrong even when it's working. Spirit-level the base before you fill.
• A foam ground sheet under the tub is strongly recommended — it protects the bottom fabric, adds a little insulation against cold ground, and smooths out minor surface imperfections. We include a ground mat with most of our inflatables; if yours doesn't, buy one.

Power — you need the full 13A, not a borderline supply

Our inflatables run from a standard outdoor-rated UK 13A socket on an RCD-protected circuit. The important caveat is that the socket genuinely needs to be able to deliver the full 13A. When the tub is heating — especially on a fresh fill or a cold morning — it draws close to the full 13A to get the water up to temperature quickly. An under-specified supply (an over-loaded ring main already feeding half the garage, a weak spur, a long indoor extension lead trailed out a window) means a slow or stalled heat-up, nuisance RCD trips, and a tub that never holds its set point.

The right answer is an outdoor-rated 13A socket on a healthy circuit — installed by an electrician if you don't already have one within cable reach. It's a short job and well worth doing before the tub arrives. What you must not do is try to make the install work with indoor extension leads trailed through windows, daisy-chained power strips, or an indoor-only socket on the wrong side of the wall — that's how fires start, RCDs nuisance-trip in the rain, and manufacturer warranties get voided.

Water care: the discipline, not the chemicals

An inflatable needs the same basic water chemistry as any other hot tub — a sanitiser (chlorine or bromine), pH in a narrow band, and a shock dose after heavy use. The chemicals are cheap and straightforward. What keeps the water clear is the discipline: test a couple of times a week with a strip, rinse the filter every few days, replace the filter every 4–6 weeks, and change the water every 4–6 weeks. Skip any of those and the tub goes cloudy, then problematic, then has to be drained anyway. A tidy routine saves more chemicals than any specific product choice.

Winter — a year-round spa, not a fair-weather one

Unlike the high-street bubble-tub category, our inflatables are built to sit on your patio through a British winter and keep giving you Friday-evening soaks in January. The combination of the vinyl body wrap and the 74cm depth is what makes that realistic — the tub holds 38–40°C without the heater permanently pinned at max.

Two viable approaches, depending on how you want to use it:

• Run it year-round (the design intent). Cover strapped on when you're not using it, heater active, chemistry kept up. Expect a higher electricity bill in the coldest weeks than in summer — that's physics — but materially lower than a competitor inflatable at the same set point.
• Run it seasonally, pack it away in winter. Optional, not required. Drain, clean and dry the tub, fold it back into its bag and store somewhere dry and rodent-free. Handy if you're going away for a full winter, don't want the tub on the patio when it's not in use, or are running it at a rental property.

The one thing to avoid: leaving the tub full of water but switched off during a hard freeze. A frozen heater or pump is a write-off, not a warranty claim. If you're going away for a fortnight in January, either keep the tub running normally with the cover on, or drain it before you go.

Where Canadian Spa fits

Our inflatable range is held in our UK warehouse, supported from our UK showroom and backed by a UK-based customer service team — so if something goes wrong in week 3 of owning it, you're phoning Redhill, Surrey, not emailing a reseller in Shenzhen. We've been trading as a hot tub specialist in the UK for over 35 years, and the same UK-first support ethos that runs our acrylic and swim spa ranges runs the inflatables — they're not a bolt-on from a third-party brand, they're a Canadian Spa product.