Celsium Benas EX  — Wood-Fired Hot Tub (External Stove)-1
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Celsium Benas EX — Wood-Fired Hot Tub (External Stove)

£3,849.00
Eight-person sauna hot tub
Hybrid sauna heating
Integrated outdoor hot tub
RGB LED lighting
Fully insulated construction

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  • Product Description
  • Specifications
  • Buying Guide
  • Heater Information
  • Electrical Supply - IMPORTANT
  • Delivery & Installation
  • Warranty
  • Return Policy
  • Resources
Product Description -

The Celsium Benas EX is a Premium Wood Fired Hot Tub with an External Heater — an Authentic Wood Burning Hot Tub For off-Grid Soaking in The Garden.

Off-Grid Wood-Fired Soaking The Celsium Benas EX is a classic round outdoor wood fired hot tub that heats by wood fire alone, with no electricity required to warm the water. As a true off-grid wood burning hot tub, it brings the ritual of a crackling fire and deep, steaming water to your garden or terrace — a shared, screen-free way to relax, unwind and reconnect after a demanding day. Suited to gardens and terraces, it is delivered fully pre-assembled and ready to position, fill and fire.

The External Premium Stove What sets the Benas EX apart is its external heater. Mounting the premium wood-fired stove outside the tub frees the entire interior for bathers, so this external heater hot tub seats more people in the same diameter than an internal-stove design. The stove is built from marine-grade AISI 304 stainless steel as standard for corrosion resistance and a long service life, with an AISI 316 stainless steel upgrade available for salt, chlorine or coastal conditions.

Hygienic Liner & Insulated Body Inside, a smooth, hygienic liner — fibreglass as standard, or an upgraded acrylic liner with a choice of solid and marble finishes — is easy to clean and gentle to sit in. It sits within an insulated body that retains heat for longer, more comfortable soaks and helps the water hold temperature between sessions, especially when paired with the optional thermo-leather cover.

Two Sizes & Fast Warm-Up The Benas EX comes in two sizes to match your group and space: Ø 2 m (seats 5–7) or Ø 2.25 m (seats 7–9). Despite its generous capacity, this garden hot tub reaches a comfortable soaking temperature in around 1.5–2 hours, so a spontaneous evening soak is well within reach.

Weather-Resistant Exteriors & Celsium Steps The exterior is finished for British weather in natural wood or low-maintenance WPC, with timber upgrades including Spruce, Shou Sugi Ban (burnt spruce), Thermo Pine and WPC for a striking, durable look. Branded Celsium steps are included as standard for safe, easy access, and adjustable RGB LED lighting is available to set the mood for evening soaks.

Wellness Use & Base Requirements Used as part of a wellness routine, a warm soak in the Benas EX helps ease tired muscles, decompress after a long day and wind down before sleep — and pairs naturally with cold immersion or a sauna for contrast therapy. The tub needs a solid, level, load-bearing base able to support the filled weight (water alone adds roughly 1,000–1,400 kg depending on size), plus a stable position for the external stove. The Benas EX is CE certified, and because every unit is made to order you choose the size, liner, exterior finish and accessories to suit your space and routine.

Technical Specifications

  • Type: Round wood-fired hot tub with external stove
  • Capacity: 5–7 people (Ø 2 m) / 7–9 people (Ø 2.25 m)
  • Diameter: 2.0 m (185 cm inner) or 2.25 m (200 cm inner) · Water capacity: ~1,000 L / ~1,400 L
  • Height: 0.85 m · Depth: 0.95 m · Warm-up: approx. 1.5–2 hours
  • Stove: External premium, AISI 304 stainless steel (AISI 316 optional)
  • Liner: Fibreglass (standard); acrylic optional, with colour/marble finishes
  • Exterior: Natural wood (Spruce) / WPC weather-resistant finish; Shou Sugi Ban / Thermo Pine / WPC optional
  • Insulated Body · CE certified · Celsium steps included
  • Electrical: None required to heat (wood-fired)
  • Warranty: 2 years (Celsium Wellness)
Specifications +

Technical Specifications of Celsium Benas EX

  • Type: Round wood-fired hot tub with external stove
  • Capacity: 5–7 people (Ø 2 m) / 7–9 people (Ø 2.25 m)
  • Diameter: 2.0 m or 2.25 m · Water capacity: ~1,000 L / ~1,400 L
  • Height: 0.85 m · Warm-up: approx. 1.5–2 hours
  • Stove: External premium, AISI 304 stainless steel
  • Liner: Fibreglass (standard); acrylic optional
  • Exterior: Natural wood / WPC weather-resistant finish; Shou Sugi Ban / Thermo Pine optional
  • Insulated body · CE certified · Celsium steps included
  • Electrical: None required to heat (wood-fired)
  • Warranty: 2 years (Celsium Wellness)
Buying Guide +

The Celsium Hot Tub Experience Buying Guide

How It Works

The Celsium range represents the pinnacle of Nordic-inspired outdoor wellness. Because each hot tub is made to order to your chosen specification, we follow a meticulous process to ensure your delivery and set-up are seamless and transparent. Below is the step-by-step journey from your initial order to your first soak.

1. Consultation, Place Your Order & Site Assessment Your journey begins with choosing your Benas EX — size (Ø 2 m or Ø 2.25 m), liner, exterior finish and accessories. We invite you to schedule a personalised consultation with our specialist team to discuss your project.

  • Proactive Logistics: Before your hot tub enters production, we consult our "last-mile" delivery team to verify property access and site details, as the Benas EX is delivered fully assembled.
  • Bespoke Confirmation: Once we're confident the site is accessible and the specification is correct, your order is officially logged.

2. Handcrafted Production Celsium hot tubs are handcrafted to order, not mass-produced.

  • The Timeline: Due to the bespoke nature, the production lead time is approximately 6 weeks.
  • Total Lead Time: With an additional ~2 weeks for secure transit and delivery coordination, the total journey from order to doorstep is approximately 8 weeks.

3. Delivery (Fully Pre-Assembled)

  • Complimentary Delivery: Delivery to your kerbside is free of charge across UK Mainland.
  • Pre-Assembled: Unlike our flat-pack saunas, the Benas EX arrives complete and ready to use — no on-site build required. A forklift or crane may be needed for unloading and positioning depending on access; we can help coordinate this.

4. Preparation Checklist (Pre-Delivery)

  • The Foundation: Provide a solid, level base able to support the tub plus the "live load" of water and occupants, and a stable position for the external stove. Water alone adds roughly 1,000–1,400 kg depending on size, so a reinforced concrete pad, slab or structurally rated base is essential, and it must be perfectly level.
  • No Electrical Supply Required to Heat: The Benas EX is wood-fired, so no mains hook-up is needed to warm the water. If you add optional RGB LED lighting, arrange a suitable low-voltage supply with a qualified electrician.
  • Stove Clearances & Ventilation: Position the external stove with safe clearances and keep combustibles clear — we'll provide the guidance for your build.

5. Delivery & Inspection

  • Palletised, Pre-Assembled Arrival: Your hot tub arrives securely palletised and weather-wrapped, fully assembled.
  • Integrated Assistance: Kerbside delivery is standard; where access permits, our crew helps position the tub as close to its final location as possible.
  • The 24-Hour Rule: On delivery, inspect the tub carefully. To maintain warranty eligibility, any damage must be reported within 24 hours.

6. Positioning, Filling & First Fire

  • Position & Fill: Set the tub and external stove on the prepared, level base and fill with clean water.
  • First Fire: Light the external stove; the water reaches a comfortable temperature in around 1.5–2 hours. Never light the stove without water circulating.
  • Water Care: Maintain water quality with appropriate treatment, keep the optional cover on between soaks to retain heat, and drain down in hard frost if not in use.

7. Aftercare & Ongoing Support

  • Aftercare: Periodically clean the liner and inspect the stove and timber exterior; re-treat natural timber as needed for your local climate.
  • Ongoing Support: As your dedicated reseller, we're here for the long haul — contact us anytime for accessories, maintenance advice or technical assistance.
Heater Information +

Heater Information

The Benas EX is heated by an external, wood-fired premium stove, mounted outside the tub so the full interior stays free for bathers. It is built from AISI 304 stainless steel as standard, with an AISI 316 stainless steel upgrade available for enhanced corrosion resistance in salt, chlorine or coastal conditions. An optional 90° stove-connection (flue) kit is available to route the chimney to suit your installation. From a cold start, the stove warms the water to a comfortable soaking temperature in approximately 1.5–2 hours, depending on size, starting water temperature and conditions.

The wood-fired stove's kW heat output is not published by Celsium. [confirm]

Safe Operation

  • Never light the stove without water in the tub covering the heater — firing it dry can cause serious damage and is unsafe.
  • Keep combustibles clear of the stove and flue at all times, and observe safe clearances from fences, structures and overhanging foliage.
  • Set the external stove on a stable, non-combustible footing, and supervise it while lit; keep children and pets at a safe distance.
  • Full operating and water-care guidance is supplied with your Benas EX .

Optional Electric Heating & Equipment

The Benas EX is wood-fired and needs no electricity to heat. For faster heating, or to top up the temperature without lighting the stove, Celsium offers an optional electric water heater in 3 kW, 6 kW or 9 kW ratings as an add-on to the wood stove (this requires a suitable mains supply — see Electrical Supply). Further optional, electrically powered equipment includes a hydro massage system (1.1 kW), an air bubble massage system (0.7 kW), an antibacterial UV lamp and water filtration (sand-filter options). These are configured at the time of order; none are fitted unless selected.

Electrical Supply - IMPORTANT +

Electrical Supply & Installation Requirements — Celsium Benas X

 The external stove heats the water by wood fire alone, so there is no mains hook-up and no running cost to warm your hot tub.

If you add optional electrics, a suitable supply is required. Any of the optional, electrically powered features below need a suitable mains electrical supply, designed and installed by a qualified electrician to current UK standards — a dedicated circuit, RCD protection, and full compliance with BS 7671 (the IET Wiring Regulations) — using outdoor-rated, weatherproof components appropriate to an outdoor installation.

Optional electrics that require a supply:

  • RGB LED lighting (low-voltage)
  • Optional electric water heater — 3 kW, 6 kW or 9 kW (add-on for faster or top-up heating)
  • Hydro massage system (1.1 kW) and/or air bubble massage system (0.7 kW)
  • Antibacterial UV lamp
  • Water filtration (sand-filter system)

Celsium does not publish the voltage, phase, amperage or circuit rating for the optional electric water heater or the massage/UV/filtration equipment; the exact supply requirement should be confirmed with Celsium and specified by your electrician before installation. 

Please note: The Benas EX does not include or offer a heat pump or chiller. It is a wood-fired hot tub; where additional or electric heating is wanted, the options are the electric water heater (3 / 6 / 9 kW) and the massage, UV and filtration equipment listed above — not a heat pump or chiller. (Celsium's separate electric dual-temperature product is a different model and is not part of the Benas EX range.)

Delivery & Installation +

Delivery and Installation Protocol for the Celsium Benas EX

Proactive Logistics & Lead Times We ensure all logistical hurdles are cleared before your hot tub enters production.

  • Site Assessment: Before production, we consult our "last-mile" team to verify property access and site details — important, as the Benas EX is delivered fully assembled.
  • Production Timeline: Handcrafted to order — production lead time approximately 6 weeks.
  • Total Lead Time: With ~2 weeks for transit and coordination, approximately 8 weeks from order to doorstep.

Delivery & Handover

  • Complimentary Shipping: Kerbside delivery is free of charge within UK Mainland.
  • Fully Pre-Assembled: The Benas EX arrives complete — no on-site assembly required. A forklift or crane may be required for unloading and positioning depending on access, which we can help coordinate.
  • Integrated Assistance: Where access permits, our crew positions the tub as close to its final location as possible.
  • 24-Hour Quality Audit: Inspect the tub on delivery; report any transit concerns within 24 hours to maintain warranty eligibility.

Installation & Set-Up

  • No Build, No Mains Heating: Set the pre-assembled tub and external stove on a prepared, level base and fill with water — the wood-fired stove needs no electrical connection to heat.
  • Base: A solid, level, load-bearing base (reinforced concrete, slab or equivalent) rated comfortably above the filled weight (water adds ~1,000–1,400 kg) is essential, with a stable position for the external stove.
  • Optional Lighting: If RGB LED lighting is selected, a qualified electrician should provide the low-voltage supply.

Aftercare

  • Maintain water quality, keep the optional cover on between soaks, and drain down in hard frost if not in use. Re-treat natural timber as needed.

Warranty +

Professional 2-Year Limited Warranty Celsium Wellness Saunas

As an authorised professional provider of Celsium Wellness saunas, we offer a comprehensive 2-Year (24-Month) warranty across our entire sauna collection. Engineered to elite Scandinavian standards, Celsium saunas use premium materials and advanced structural craftsmanship to ensure a lifetime of therapeutic performance.

1. Warranty Scope & Coverage Duration Every Celsium product is protected by a 24-month guarantee from the date of delivery, covering manufacturing and material defects.

Component Category

Warranty Period

Coverage Specifics

Structural Integrity

2 Years

Main cabin structure, precision joinery and frame

Manufacturer Defects

2 Years

All integrated hardware and production-related faults

Technical Support

Lifetime

Access to professional wellness consultants and support

2. Professional Quality Standards

  • Premium Timber Integrity: Cover for defects in raw materials and craftsmanship affecting structural safety.
  • Precision Glazing: Protection for tempered glass and panoramic windows against manufacturing-related stress fractures.
  • Hardware & Fittings: Cover for hinges, handles and internal bench structures.
  • Heating & Controls: Harvia/HUUM heating systems are covered under their own professional warranties (typically 2–5 years residential); factory-installed wiring and lighting are covered when commissioned by a qualified professional.

3. Professional Installation & Maintenance (conditions)

  • Certified Assembly: Valid provided the sauna is assembled per the Celsium User Manual; some protections may be invalidated if not professionally assembled by an authorised team or certified contractor.
  • Electrical Commissioning: All electrical components must be connected by a qualified electrician; proof of certified installation may be required.
  • Site Preparation: Must be placed on a level, solid foundation to prevent warping or moisture ingress.
  • Maintenance: Regular maintenance, including wood treatment and cleaning per the manual, is required for continued validity.

4. General Exclusions

  • Natural Wood Characteristics: Minor discolouration, dimensional change or small cracks from humidity are not defects.
  • Environmental Damage: Damage from extreme weather, or improper storage of unassembled units left over 1 year.
  • Improper Use: Operating above recommended temperatures or use other than intended.
  • Unauthorised Repairs: Any modification or attempted repair by non-authorised personnel voids the warranty.

5. Commercial & Trailer Installations Products used commercially (spas, rentals, gyms, health clubs) or on mobile trailers may carry different terms, confirmed at purchase or in the User Manual.

6. Claim Procedure & Support Report any defect within 7 days of discovery. Required: proof of purchase and delivery date, photographs/video of the defect, and confirmation of professional electrical installation. Contact contact@balancerecovery.co.uk.

Return Policy +

Returns and Refunds Policy Bespoke & Made-to-Order Collection

At Balance Recovery, we curate premium, made-to-order products. Because items in our bespoke range are commissioned specifically to your requirements, our returns and refunds policy reflects their specialised nature.

1. The Bespoke Nature of Your Purchase

  • Final Sale: Due to the personalised nature of these items, we cannot accept returns or refunds for a "change of mind" once the order has entered production.
  • Accuracy: Please verify all site dimensions and technical requirements before finalising an order.

2. Natural Material Disclosure

  • Crafted from sustainably sourced timber: Every unit shows distinct grain, knots and texture; final shading may vary slightly from images or samples; minor surface "shakes" (small cracks) may occur as the wood adapts — none of these are defects.

3. Order Cancellations and Amendments

  • Cancellation Window: You may cancel or amend within 24 hours of placing your order.
  • Administration Fees: Cancellations after this window but before fabrication begins incur a 10% fee covering administration and material allocation.
  • Post-Fabrication: Once production has begun, cancellations cannot be facilitated.

4. Damages and Manufacturing Faults

  • Transit Damage: Inspect on delivery; note any damage on the delivery paperwork and report to contact@balancerecovery.co.uk within 48 hours with photographic evidence.
  • Manufacturing Defects: We coordinate repair, replacement or refund in accordance with the Consumer Rights Act 2015.

5. Statutory Rights and Compliance

  • Consumer Contracts Regulations 2013: Bespoke/made-to-order goods are legally exempt from the standard 14-day cooling-off period for distance selling.
  • Consumer Rights Act 2015: Goods must be of satisfactory quality, fit for purpose and as described; your statutory rights for faulty or misdescribed goods remain fully protected.

6. Contact and Support Email contact@balancerecovery.co.uk — we aim to respond within one business day.

Product Overview

Benas EX — A Wood-Fired Hot Tub with a Space-Saving External Stove

Bring authentic, off-grid soaking to your garden with the Celsium Benas EX, a classic round outdoor wood-fired hot tub with an external wood-fired heater. Placing the stove outside the tub frees up the entire interior — so you get maximum seating and comfort, heated by wood fire with no electricity required. Built for social relaxation, the Benas EX is available in two sizes: Ø 2 m (seats 5–7) or Ø 2.25 m (seats 7–9), warming to temperature in around 1.5–2 hours. Inside, a smooth, hygienic liner (fibreglass as standard, or acrylic) sits within an insulated body, finished outside in natural wood or weather-resistant WPC and supplied with Celsium steps for easy access. The external stove is built from marine-grade AISI 304 stainless steel for long-term durability. The Benas EX is CE certified, insulated for efficient heat retention, and delivered fully pre-assembled — positioned, filled and ready for its first fire. Because every unit is made to order, you choose the size, liner, exterior finish and accessories to suit your space.

Why Choose Celsium Benas EX — Wood-Fired Hot Tub (External Stove)?

A made-to-order, wood-fired hot tub with maximum room inside.

Wellness Benefits

Deep, warm soaking for recovery, circulation and switching off.

Premium Features

Signature details of the Benas EX experience.

What’s included?

what comes as standard, and what you tailor.

Step-by-step Instructions

From Order to First Soak in 6 Steps

Build Overview

Technical Specifcations

SpecificationValue
TypeRound wood-fired hot tub, external stove
Capacity5–7 people (Ø 2 m) · 7–9 people (Ø 2.25 m)
Diameter2.0 m or 2.25 m
Water CapacityApprox. 1,000 L (Ø 2 m) · 1,400 L (Ø 2.25 m)
Height0.85 m
Warm-Up TimeApprox. 1.5–2 hours
StoveExternal premium stove, AISI 304 stainless steel
LinerFibreglass (standard); acrylic optional, with colour/marble finishes
ExteriorNatural wood or WPC, weather-resistant finish; Shou Sugi Ban / Thermo Pine optional
InsulationInsulated body
LightingAdjustable RGB LED optional
CoverThermo-leather cover optional (black or grey)
AccessCelsium steps included
Electrical SupplyNone required to heat (wood-fired)
CertificationCE certified
Suitable ForGardens and terraces
DeliveryFully pre-assembled, kerbside
Warranty2 years (Celsium warranty conditions)
Manufactured byCelsium Wellness
Height shownCelsium's published figure (0.85 m); confirm against your records (intake noted 1.05 m)

Technical Notes

Frequently Asked Questions

How many people does the Benas EX seat?
What's the difference between the Benas EX and theBenas In?
Does it need electricity?
How long does it take to warm up?
What is the stove made of?
Is it delivered assembled?
What base does it need?
What warranty is included?

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