The Chill Therapy Spa

Down to 5 °C, on its own, from mains-fill tap water. No ice bags, no freezer pre-chill, no plumbing in. The Balboa Clim8zone II heat pump inside the cabinet does the work — and it's published, not implied. Most owners settle on an 8–12 °C cold setpoint for regular plunges; that's the range where the cold-shock response kicks in fully without the first-timer's gasp you get at 5 °C.

First cool-down from a fresh mains fill takes several hours and depends on ambient — a cold garden in January pulls the tub down faster than a 25 °C summer day. Once you're at setpoint the unit cycles on and off intermittently, like a fridge.

Yes — up to 39 °C, deliberately one degree below the 40 °C UK statutory hot-tub ceiling. That means you can flip between cold plunges during the training week and warm soaks at the weekend, or run the full Scandinavian / Finnish hot–cold–hot cycle in a single piece of equipment. We're one of the few units at this price that lets you do contrast therapy in one tub. Most integrated plunges are cold-only; we heat too, because the Balboa Clim8zone II is the same bidirectional heat pump we fit to our acrylic hot tub range.

A Balboa Clim8zone II. Balboa is the hot tub industry's reference electronics brand — real, verifiable kit, not a marketing sub-brand. This is the same industrial heat pump we offer as an optional chiller/heater upgrade on our acrylic hot tub range; on the Chill Therapy Spa it ships as standard and runs in cooling mode as its primary job.

We lead on this fact because most competitors at this price won't tell you which heat pump is inside their tub. The heat pump is the whole game on an integrated plunge — everything else is a shell with plumbing. Naming the unit is the spec-transparency difference.

One adult at a time, seated upright with legs outstretched. It's not lie-flat. It's not a two-person tub. The Chill Therapy Spa is designed as a single-seat plunge — one person, one session, the way cold-plunge work is supposed to be done. If you want a shared ritual, pair the plunge with one of our acrylic hot tubs in the same grey cabinet — two tubs, side by side, is the proper contrast-therapy setup.

Lead with the airflow rule because it's the single biggest cause of support calls: the Chill Therapy Spa needs at least 1 metre of clear space on every side so the Balboa heat pump can draw air in and exhaust heat out. Boxed in against a wall, fence, cabinet or planter, the chiller suffocates — and almost every "my tub won't get cold" ticket we handle traces back to airflow, not to the unit itself. A metre on all four sides. Non-negotiable.

The base needs to be level and load-bearing, rated for the filled weight of 640 kg: a concrete slab, an existing patio in good condition, or reinforced timber / rated decking. Levelling is the same rule as our hot tubs — as long as the slab doesn't drop more than 2 inches over the 212 cm length of the tub, it's fine. Don't drop it onto soft lawn or loose pavers.

Sanitation is Mountain Pure™ UV-C + ozone — the same dual system we fit to our acrylic, patio and swim spas. A UV-C lamp inside the plumbing sterilises water on every pass; ozone oxidises organics before the water re-enters the shell. Both run automatically — they do the heavy lifting for you.

Owner routine on top: small chlorine granule top-ups to keep a residual, pH balancer, occasional shock. Chemical demand is a fraction of what you'd run on an unfiltered ice bath or a chest-freezer conversion, because UV-C + ozone is already doing most of the job. A starter chemical kit is sold separately.

Water change every 4–6 weeks is standard for a cold plunge on UV-C + ozone. Hose drain, rinse, refill — takes an evening.

Several hours from a fresh mains fill, depending on ambient. A 4 °C January garden will pull the tub down to a plunge-ready setpoint faster than a 25 °C August afternoon. We quote "several hours" rather than a single number because ambient dominates — we'd rather set an honest expectation than a suspiciously specific one.

Plan the first fill for the morning or afternoon before your first plunge. Once you're at setpoint, the unit holds it intermittently — cycling on for short bursts as needed, not running flat-out — which is why day-to-day running cost is a fraction of a hot tub's.

Structurally, yes — the shell and cabinet don't care where they sit. In practice, most owners install outdoors because of the heat pump. The Balboa Clim8zone II needs constant airflow to draw cool air in and needs somewhere to exhaust the heat it rejects. Indoors, that means purpose-built ventilation: a vented plant room, an outbuilding with airflow in and out, or an engineered spa room with HVAC that can take the heat rejection.

Indoors without that ventilation plan, the chiller slowly builds the room temperature up, the unit works harder to hit setpoint, and you end up with a warm, damp room and a struggling heat pump. If indoor install is the ambition, call us on 01293 824 094 before you order and we'll walk through the ventilation spec.

12 months, parts and labour, all in. Covers the structure (shell + cabinet + plumbing) and the integrated Balboa Clim8zone II chiller unit, plus the Mountain Pure™ UV-C + ozone sanitation system. No split invoice between parts and labour, no tiered add-ons, no annual-service clause to keep it active. UK support, UK labour, one year.

Out of scope: consumables (chlorine, pH balancer, replacement filter cartridges), chemical damage from running the water outside sensible chemistry, and misuse. Install & assembly (optional paid add-on) is covered by its own workmanship guarantee.

Free kerbside delivery to mainland UK, ~10 working days from order. The tub arrives on a pallet — dry weight 140 kg, so two people can wheel it into position on the flat. Kerbside means the driver drops at the edge of your property; getting it to the final patio spot is on you (or on the optional paid install team).

If access is tight (narrow side gate, steep driveway, steps up to a garden), or you'd rather have us site, level-check and commission the Balboa before we leave, add paid install & assembly at £599 — UK-wide. This is the same compact-spa install service we run on our portable acrylic range. Arrange at checkout or by phone after the order.

Genuine question, honest answer. The premium imported cold-plunge category sits in the £3,500–£6,000 bracket — serious kit, and if that's the budget you're working with, nothing wrong with going there. The Chill Therapy Spa sits below that bracket at £2,495.00, and we get there by using the same Balboa heat pump the premium category uses, wrapped in the same grey composite cabinet we already tool for our acrylic hot tub range. Lower development cost, same chiller.

The other honest difference: we name our chiller. A lot of the premium imports publish temperature ranges but not the unit inside. Balboa Clim8zone II is on the spec sheet and on the back of the tub. If that transparency matters to you, this is the right price bracket.

Cold-water immersion is a powerful physiological stimulus. For most healthy adults it's brilliant — it reduces muscle soreness, speeds post-workout recovery, decreases inflammation, improves circulation, boosts the immune system, triggers noradrenaline and dopamine release, and improves sleep quality. It builds mental resilience and is a proper mindfulness tool. That's why athletes use it and why it's part of Scandinavian wellness tradition.

If you're pregnant, have a heart condition, Raynaud's, high blood pressure, or any other cardiovascular or circulatory condition, speak to your GP before starting cold-plunge work. That advice applies to any cold-water immersion, not just ours.

Yes. Our showroom is at Canada House, Unit 1, Salbrook Road, Redhill, Surrey · RH1 5GL. Ten minutes from Gatwick. Open Monday–Friday 9am–6pm and weekends 10am–4pm. Please call ahead (01293 824 094) if you'd like us to have a Chill Therapy Spa at plunge temperature and ready for a wet test — the Balboa needs some lead time to pull setpoint down.