Hot Tubs and Your Glamping Offer: to have, or not to have?

SUPA Spa Forge Core design and construction in Light Grey — engineered for the commercial uplift without the operational pain.

Hot tubs have become a pivotal feature in the UK glamping industry, and the numbers behind that statement are no longer up for debate. Across the major holiday-letting platforms, "hot tub" sits at or near the top of the most-requested guest search terms — over 33,000 monthly searches in the UK for "glamping with hot tub" alone, and more than 200,000 a month when "lodges with hot tubs" is included.^[1] The "hot tub holidays" search universe now exceeds 215,000 monthly searches in the UK and is driving a £250+ per-night premium accommodation tier.^[2]

The commercial uplift on a hot-tub-equipped property is now well-quantified. Industry research from Ideal Hot Tubs places the occupancy effect at an average lift from 60% to 80% per annum^[3] — a roughly 33% relative increase. AirDNA's analysis of comparable rentals puts the average daily rate uplift at 33% higher for properties with hot tubs versus those without,^[4] with revenue-management specialists Beyond Pricing seeing typical premiums of 20–25% across their portfolio.^[5] At the top end, Cool Camping data cited across the sector indicates premiums of up to 50% for luxury glamping with hot tubs or outdoor baths,^[6] and Adventure Business Update's 2025 luxury report finds AONB properties commanding up to 40% more than the rest of their region.^[2]

So, if the demand and pricing power are that clear-cut, why doesn't every site have one? Here's why — because hot tubs are not a plug-and-play purchase. There is a capital cost, ongoing operational cost and — most importantly — a non-negotiable duty of care under the Health and Safety Executive's HSG 282 guidelines. If a guest contracts Legionella or another waterborne illness and your hot tub is implicated, demonstrable compliance with HSG 282 could be the difference between a manageable incident, a prosecution and potential closure. Imagine seeing a site with a reported incident in the press, especially propagated through social media — would you book it?

Then there is the operational squeeze every glamping operator knows well: the five-hour changeover window between 10am and 3pm in which the tub has to be drained, cleaned, refilled, reheated and chemically balanced — ready for a guest who paid a premium for the privilege and will not be impressed by a lukewarm welcome.

Done badly, a hot tub is a liability. Done properly, it's one of the most rewarding investments an operator can make. This article walks through both sides honestly, and then shows you how SUPA Spa, SUPA Dock and the SUPA Heater are engineered to remove the operational pain altogether.

The market in context — premium UK glamping is now operating at a £120–£250+ per-night price point.

The Commercial Case

It's worth dwelling on the financial uplift because it determines everything that follows. The headline numbers from across the UK and US holiday-let industries in 2025/2026 are consistent:

• Occupancy. Ideal Hot Tubs reports an average annual occupancy lift from 60% to 80% for hot-tub-equipped holiday lets — a 20-point absolute increase, or roughly 33% relative (a little optimistic we believe but reported).^[3] AirDNA's US market analysis shows a smaller but still material +4% absolute occupancy uplift on top of significant rate gains.^[4]
• Nightly rate. AirDNA's market data puts the ADR premium at 33% — three-bedroom rentals with hot tubs averaged the equivalent of around £225/night versus £170/night without (converted from USD at current rates).^[4] UK research from The Glamping Show found a more conservative £24/night specific uplift attributable to a hot tub alone, all else equal.^[7] Beyond Pricing's revenue managers see 20–25% premiums typically.^[5]
• Combined revenue effect. On AirDNA's data, the average hot-tub-equipped 3-bedroom rental generates approximately £12,000 more revenue per year than a comparable property without one (converted from USD).^[4]
• Search demand. Hot tub-related accommodation searches in the UK now exceed 256,000 per month across the major terms — and convert at premium rates.^[1][2]

For a typical UK glamping pod baseline of £120–180 per night,^[8] applying a 25–30% hot tub premium against the AirDNA occupancy lift produces a credible additional annual revenue range of £8,000 to £15,000+ per pod, depending on location, length of season, and rate strategy. AONB and Highland properties at the top end of the market are achieving considerably more.^[2]

That's the prize. Now to the bit that gets a lot less airtime: what it actually takes to keep it.

SUPA Spa Forge Core construction in Anthracite. Precision wood/plastic composite (WPC) materials, integrated 31 kWh heating, the fastest heat-up times in the world — the only hot tubs that stay hot as long as the customer wants and significantly cheaper to operate than using electricity.

Why Hot Tubs Matter — and What Tends to Go Wrong

The allure of hot tubs in glamping is straightforward: they sell. They attract a broader clientele, lift occupancy, increase nightly rates and provide genuine competitive separation in a category that is otherwise getting more crowded every year. Standing out from the crowd is a clear competitive advantage.

The catch is everything that sits behind that experience: the capital outlay, the tax position (which materially changed from 6 April 2025), the design specification, the heating physics and the chemical management. Each is solvable. None are optional. The operators who struggle are almost always the ones who treated the hot tub as a feature to bolt on to make 'a fast buck', rather than a system that is considered and engineered to be fit for purpose.

Below we work through the four areas that determine whether a hot tub installation will reward you or punish you: design and specification, heating economics, water and bacterial management, and the operational reality of getting any of the above wrong.

Compliance with HSG 282

HSG 282 is the UK's Health & Safety Executive's (HSE's) guidance document for the safe operation of hot tubs in commercial settings — and that includes holiday lets and glamping sites.^[9] At first read it can look like an exhausting list of requirements; in practice it breaks down into two clear areas: tub design and water management. Get the design right at the point of purchase and the rest becomes a daily discipline rather than a constant firefight.

Section 1 — Hot Tub Design

The following captures the practical considerations every operator should weigh before committing:

Construction and Material Selection

• Durable, non-porous materials — easy to clean, resistant to biofilm, stable under continuous disinfectant exposure. This rules out wooden tubs unless they have a fibreglass, acrylic, plastic, aluminium or stainless-steel liner.
• No fabric headrests or porous surfaces — these harbour bacteria. If fitted, they must be fully removable and the surface behind them must be cleanable.
• Smooth internal surfaces to minimise biofilm accumulation.

Filtration and Circulation

• Continuous filtration capable of turning over the full water volume every 15 minutes. For a typical 4-person, 1,000-litre tub, that means a minimum flow of 16.7 litres per minute.
• Automatic dosing is recommended for high bather loads. For domestic-spec tubs in a glamping business context, the HSE has confirmed that diligent manual chemical management with accurate daily records is acceptable.

Water Capacity, Depth and Bather Load

• 250 litres of water per bather as a minimum design target.
• Water depth of 85–100 cm from the footwell base.

Drainage and Water Replacement

• Full drain capability — including moulded seats and footwells where water can be retained.
• Quick-drain function to make changeovers manageable inside the five-hour window.
• Accessible pipework with no dead legs where stagnation can occur.

Built for the Glamping Industry — SUPA Spa Forge Core Construction

The SUPA Spa Forge Core was engineered specifically to tackle and address the operational realities outlined in HSG 282 and the commercial demands of the modern UK holiday-let market.

At the heart of every SUPA Spa Forge Core is a precision-built wood/plastic composite (WPC) exterior housing an independent recirculation pump, the integrated SUPA Heater, and the propane tank in one neatly engineered unit. The structural design delivers what others can't — the fastest heat-up times in the world and the only spa range with intelligently controlled temperature maintenance.

The Heating Problem — and the Maths Behind It

Here is the single biggest operational hurdle in commercial hot tub ownership: getting the water hot enough, fast enough, inside the changeover window. Nothing else comes close.

Four variables determine heat-up time:

• Volume of water — bigger tub, more energy, longer time to heat.
• Temperature differential — the colder the starting water is, the more you have to lift it.
• Tub insulation — poor insulation means heat is leaking out as fast as you put it in.
• Ambient air temperature — winter operation is materially harder than summer.

Why "plug-and-play" hot tubs can't do the job commercially

A standard 13-amp plug delivers a theoretical maximum of 2.86 kWh (220 V × 13 A). In a hot tub, that ceiling has to be shared between the heater, the recirculation pump, the jet pump and the control system — so the heating element itself is typically a 2 to 2.2 kW unit, otherwise you are unable to use the filter/jets and heat at the same time.

Now do the energy maths. Lifting 1 litre of water by 1°C takes 0.001163 kWh. A 1,000-litre tub filled with winter mains water at 7°C, heated to a BISHTA-compliant 40°C — a 33°C lift — needs 38.4 kWh of net energy input. That's the physics and nothing changes it.

Time to heat 1,000 litres by 33°C — heating system comparison

Divide 38.4 kWh by your changeover window, factor in heat loss during fill, and the practical minimum is around 10 kW of useful heat input per hour. That requires a dedicated circuit running at least 17 amps — well beyond a domestic socket.

Wood-fired tubs: the aesthetic trade-off

Wood-fired tubs look beautiful — particularly in a glamping setting — and they can heat reasonably fast when fuelled properly. But they require constant monitoring to ensure they're sufficiently fuelled, that they don't exceed a safe 40°C, and that smoke production isn't pushing into a neighbouring pod. When you're running multiple units across a changeover, the labour cost of doing this well is rarely talked about honestly at point-of-sale.

Air Source Heat Pumps

These are consistently pushed as the perfect answer, but they're really not. They're great for reducing costs of operation, not so good for heating up rapidly. Even the basic models with COPs of 7 can cost £1,000s — and that's without factoring in the installation and rewiring necessary. COP is the amount of energy delivered in kWh per 1 kWh input from the electric supply, so a COP of 7 would mean a 7 kWh output from 1 kWh input. Great right? Well, yes and no.

COPs are maximised when ambient temperatures are high, and many retailers market the highest COP at ambient conditions of say 25°C. What happens when ambient conditions are not 25°C? The COP drops like a rock and you are not getting what you paid for — worse still, you are left out of pocket for a piece of equipment that was meant to solve the hot tub heating issue but falls way short.

If you consider that the average temperature in the UK reported between 1990 and 2025 by the UK Meteorological Office was 9.24°C — the lowest was 7.94°C and the highest 10.09°C (data.gov.uk) — you can clearly see the problem.

The realistic options for rapid heating

There are three credible routes to getting a tub up to temperature inside the window:

• Pre-fill with hot water from a combi-boiler — fastest start, but only viable if the accommodation's hot water system can sustain the demand and doesn't place the hot water supply to the unit at risk.
• Portable high-power heaters — propane-fuelled units such as the SUPA Heater (31 kWh output) that can heat a 1,000-litre tub from cold in roughly an hour and which can move between units across a site.
• Quick-drain, high-flow plumbing — reduces the dead time on either side of the heating job itself.

Whatever route you choose, the principle is the same: heat input has to exceed heat loss during a defined window, and the tub itself has to be well-insulated enough to hold that heat once you've put it in.

SUPA Heater · 31 kW propane-powered. The actual unit in working configuration — the changeover solved.

The Changeover Solved — SUPA Heater

One SUPA Heater can fully heat three 1,000-litre hot tubs from 8°C to 40°C during a single changeover — enabling same-day bookings with fully heated tubs within 90 minutes of arrival.

The SUPA Heater is a portable, propane-fuelled 31 kWh boiler-and-pump system that operates in two modes: Mode 1 recirculates and heats existing tub water; Mode 2 connects directly to a mains hose and delivers hot water on the fill — even in the depths of winter.

• 31 kWh heat output — heats a 4-person tub from 20°C to 40°C in around 40 minutes
• Three to four tubs heated per changeover — moves between units; no replication needed
• Two operating modes — recirculation or direct mains fill
• 43% lower greenhouse gas emissions than standard grid-electric heating^[10]
• Heats a 1,000-litre tub for under £4.00 using a 47 kg tank

Energy required by season — heating 1,000 litres from mains temperature to 40°C

Section 2 — Water and Bacterial Management

A hot tub held at typical operating temperature is, biologically speaking, a bacterial soup. Below 20°C bacteria don't proliferate. Above 50°C they start to die. In the 37–40°C zone where guests want to bathe, both Legionella and Pseudomonas aeruginosa thrive given any opportunity. Water management isn't an admin task — it's the thing standing between your business and a notifiable public health incident which could ruin the business.

Chemical storage and dosing

• Inline chemical feeders for high-bather-load commercial tubs. For domestic-spec tubs run as a business activity, the HSE has confirmed that diligent manual dosing with accurate daily records is acceptable.
• COSHH-compliant storage with proper labelling for all chemicals.
• Accessible filters and pumps — if maintenance is awkward, maintenance will be skipped.
• No dead legs in the pipework.

Water change frequency

HSG 282 specifies water replacement weekly or after each changeover — whichever is shorter. For glamping, that means a full refresh between every guest, period.

Step 1 — Commissioning

Before any guest uses a new tub — shock the system for a minimum of one hour at a chlorine level of at least 50 mg/l (50 ppm) with pH at 7.0. Only after this initial kill cycle should you balance the water chemistry for normal operation. This is a once-done, never-again action providing no stagnant water has been left in the system; if it has, it should be repeated before any guest uses the tub. If you have a repeated turnover of guests daily, this will not be necessary.

Step 2 — Monitoring and Recording

This is the table that should live, printed and laminated, next to every commercial hot tub on a glamping site:

Section 3 — The Two Infections to Understand

HSG 282 will keep you compliant. But operators should also understand, in plain English, what they are actually protecting their guests against. There are two infections that matter.

The two waterborne risks every operator must manage

Both organisms thrive in the same conditions: warm water, inadequate disinfection, biofilm-coated pipework, and stagnation. The HSG 282 control regime addresses both simultaneously. Get the regime right and you eliminate the conditions in which either pathogen can establish.

What you cannot afford is to assume that "the previous owner ran it this way" is a defence. If a guest reports symptoms and your hot tub is implicated, the question is whether you were demonstrably compliant. Records are everything.

The opportunity in context — a hot-tub-equipped glamping property in an AONB setting can command up to 40% more than the local market rate.

Conclusions

Hot tubs can significantly enhance the appeal and profitability of glamping sites. The market evidence on demand, occupancy and nightly rate lift is unambiguous — guests want them, they pay materially more for them (a 33% ADR uplift on AirDNA data, 60% → 80% annual occupancy on Ideal Hot Tubs data), and they return for them. Industry research consistently shows additional annual revenue of £8,000–£15,000+ per pod on typical UK rates, with AONB and Highland properties achieving considerably more.

What hot tubs don't do is run themselves. The compliance overhead under HSG 282 is real, the heating maths is unforgiving inside a five-hour changeover window and the consequences of cutting corners on water management range from a poor review to a public health investigation.

Operators who get this right — proper tub specification, a heating system that actually works in January, daily chemical discipline and digital record-keeping — find that hot tubs deliver one of the strongest returns on capital available in the staycation sector. Operators who get it wrong find out the hard way.

The SUPA Spa Forge Core construction, with integrated 31 kWh SUPA Heater, has been engineered specifically to remove the operational pain, so operators can focus on bookings and margin, rather than firefighting the changeover. It's not the only way to do this well. But it is the way we'd recommend if you wanted to do it once, do it right, and stop thinking about it.