How Much Is a Wood Burning Stove for a Hot Tub?

A standalone wood fired hot tub heater typically costs between £400 and £1,500 in the UK, depending on whether it’s an internal or external stove, the material (stainless steel or marine-grade aluminum), and its heating capacity in kW. If you’re buying a complete wood fired hot tub for sale with the stove already included, expect to pay somewhere between £2,900 and £6,500 for the full setup, tub and heater together.

The exact price depends heavily on a few key factors, which this guide breaks down so you know exactly what you’re paying for and why prices vary so much between suppliers.

Quick Price Overview

These figures reflect typical UK market pricing and will vary by tub size, brand, and specification.

What Affects the Price of a Wood Fired Hot Tub Heater

1. Internal vs External Stove

An internal wood stove sits inside the tub itself and is generally the more affordable option, since it needs less material and no external housing. An external stove sits outside the tub and connects via hoses; it tends to cost more due to the additional casing, piping, and installation, but it frees up seating space inside the tub.

2. Heater Material

Stoves made from marine-grade aluminium or high-grade stainless-steel cost more upfront than basic steel models, but they resist corrosion far better, especially important given the heater is in constant contact with water. Aluminium stoves also conduct heat more efficiently, meaning less wood is needed to reach the same temperature.

3. Heating Power (kW Rating)

A more powerful stove, such as a 30kW unit, heats water faster and can handle larger tubs, which typically pushes the price higher than smaller, lower-output stoves suited to compact two-person tubs.

4. Chimney and Fittings

Some wood fired hot tub heater packages include the chimney, stove lid, and connecting hoses as standard; others charge these as separate add-ons, which affects the total cost you’ll actually pay.

What Affects the Price of a Complete Wood Fired Hot Tub

If you’re comparing a full wood fired hot tub UK package rather than just the stove, several additional factors push the price up or down:

• Tub size and seating capacity: larger tubs need more material, thicker insulation, and a more powerful heater
• Shell material: fibreglass, acrylic, or timber shells all carry different price points
• Insulation quality:  polyurethane foam insulation adds cost but significantly reduces long-term wood usage
• Wood type used in construction: spruce, larch, and thermowood shells vary in price and durability
• Extra features: filtration systems, hybrid wood-and-electric heating, or smart pellet automation all add to the base cost

A wooden wood fired hot tub with a timber shell generally sits toward the mid-to-upper end of the price range due to the craftsmanship and material involved, while fibreglass or acrylic models can offer a more budget-friendly entry point.

Running Costs: What You’ll Spend After Buying

The upfront price of a wood fired hot tub heater is only part of the picture. Ongoing running costs are where wood-fired systems really stand out compared to electric hot tubs.

To heat around 1,500 litres of water from cold tap temperature to a comfortable soaking heat, you need roughly 50 kWh of energy. Here’s how that breaks down by fuel type:

• Electric hot tub: At current UK electricity rates, heating that volume electrically costs roughly £14 per heat-up, plus ongoing costs to maintain temperature around the clock
• Wood fired hot tub: Using kiln-dried hardwood logs, the same heat-up typically costs around £8, since only the sessions you actually use require fuel

On a per-soak basis, a wood fire heated hot tub generally works out 40-50% cheaper than an equivalent electric model, and the savings scale further if you have access to your own seasoned firewood.

Is a More Expensive Stove Worth It?

A higher upfront cost for a quality wood fired hot tub heater often pays off over time. Better-built stoves made from marine-grade materials last longer, resist rust from constant water contact, and heat more efficiently, meaning less wood burned per session. A cheaper, lower-grade stove might save money initially but often needs replacing sooner and can take longer to heat the same volume of water.

Frequently Asked Questions

How much does a wood fired hot tub stove cost on its own?

A standalone wood fired hot tub heater typically costs between £400 and £1,500 in the UK, depending on the material, size, and whether it’s an internal or external design.

How much does a full wood fired hot tub cost?

A complete wood fired hot tub, including the tub and heater, generally ranges from £2,900 to £6,500 depending on size, shell material, and insulation quality.

Is a wood fired hot tub cheaper to run than electric?

Yes. On a per-session basis, wood-fired heating typically costs around £8 compared to roughly £14 for electric heating of the same water volume, making it roughly 40-50% cheaper to run.

Are external wood stoves more expensive than internal ones?

Generally, yes. External stoves cost more due to additional housing, piping, and installation, but they free up more seating space inside the tub itself.

Does a more expensive heater mean better performance?

Often, yes. Higher-grade materials like marine-grade aluminium conduct heat more efficiently and resist corrosion better, which can reduce wood usage and extend the stove’s lifespan.

Final Thoughts

Whether you’re pricing up a standalone stove or a complete Wood-Fired Hot tubs package, the cost ultimately comes down to size, material, and heating power, with running costs consistently favouring wood over electricity session after session.

If you’re comparing a wood fired hot tub for sale and want a build where the tub and heater are properly matched for efficient heating, Tamed Ocean’s range pairs insulated shells with quality stoves designed to get the most heat from every log.