Thermowood Barrel Sauna

HC 225: thermowood barrel sauna for two to three people, suitable for use with a wood-fired heater

The Bloomcabin HC 225 is intended for couples, small families and friends who want more room than a mini barrel sauna without a separate anteroom. At about 229 cm long, 194 cm wide and 204 cm high, it remains compact, with an internal height of about 175 cm. Because the full external length serves the sauna room, it provides longer benches and more legroom.

This guide helps you assess the model’s size, use and technical requirements. Explore other designs in the Bloomcabin sauna range.

Capacity, dimensions and heating at a glance

Consider these features together, as capacity, internal height and heating type shape everyday use just as much as the external dimensions.

FSC®-certified thermowood for the classic barrel-sauna look

The HC 225 is made from heat-treated wood. Thermal treatment reduces moisture absorption and helps the timber retain its shape better than untreated wood.

Its visible grain and warm timber colour suit natural garden settings, holiday homes and timber decks especially well. Beside a contemporary house, the rounded form can also be used as a purposeful contrast.

Even after thermal treatment, wood continues to respond to moisture and temperature. Barrel bands, fixings, the door and seals should therefore be checked regularly.

Traditional sauna bathing with a wood-fired heater

The HC 225 is suitable for a wood-fired sauna heater. The fire, crackling wood and control through fuel and airflow make the heating-up period a conscious part of the sauna evening.

A wood-fired heater requires more preparation than an electric option. Before installation, confirm the flue route, heat protection and site-specific safety clearances using the component instructions. Ask the local council whether the sauna, solid-fuel heater or flue needs building consent, and check any applicable regional air-quality rules and current fire restrictions.

Match the intended heater solution early to the specific HC 225 configuration and site. The details in the relevant quotation and the installation and safety instructions for the selected components are decisive.

Plan the outdoor area to compensate for the lack of an anteroom

Because the HC 225 has no anteroom, towels, robes, shoes and drinks need a dry, easily reached place outside the cabin. An existing covered deck, garden shed or another sheltered area can work well. Keep access to the sauna clear so stored items or loose textiles cannot obstruct the door. A nearby seat also makes changing easier without taking up sauna space.

The base must be level, load-bearing and arranged so rainwater drains reliably. Individual support points must not sink or distort the barrel structure. Check the construction beneath the visible surface too. For an existing deck, assess its condition, load capacity and drainage; for a new site, the sub-base must suit both the sauna and the property. Water must not collect beneath timber parts or around the entrance.

Plan the sauna, heater and flue together when choosing the site. The chimney position affects required clearances from building elements, plants and other garden features. Access for inspection and cleaning must also remain clear. Discuss the plan with relevant professionals and authorities before assembly. Changes later can be difficult when branches, roof overhangs or other conditions obstruct the intended flue route.

Who the HC 225 suits particularly well

This model is particularly suitable when two people usually use the sauna, a third occasionally joins them, and a wood-fired heater is an intentional part of the experience.

HC 225 or HCF 225: compact seated sauna or more headroom?

The HC 225 is narrower and lower. It is aimed at buyers looking for a compact seated sauna for two to three people.

The HCF 225 is approximately 229 cm wide and 238 cm high. With around 210 cm of internal height, it provides noticeably more vertical space and is designed for up to four people.

If the most compact external dimensions are your priority, the HC 225 is a strong choice. If greater headroom, longer benches and a more open feel matter more, the HCF 225 should be shortlisted.

Mark out the footprint in your garden before buying

Mark the HC 225 external dimensions at the intended location. Include the door zone, working space needed for assembly and required clearances. This shows whether access will remain comfortable and whether there is enough room around the sauna for care and work on the heater and chimney. The footprint alone does not show the complete space requirement in the garden.

Use the documentation for the exact version to check the bench layout. Decide which places will be used most often and whether the available bench length suits your height and preferred posture. External dimensions alone do not answer this comfort question.

Also include the route between the house, storage area and sauna in your planning. Wet shoes, clothing and personal items do not belong on sauna benches. A dry storage point and clean access route allow the interior to remain fully available for sauna bathing.

Plan location, access and cooling down together

A well-chosen location shortens the walk from the house and makes the whole sauna routine easier. The route should remain visible after dark, safe to walk on and free from trip hazards. Check that doors and garden gates are easy to pass and that the route can be used reliably in wet or cold conditions. Suitable lighting should cover the entrance and path without unnecessarily dazzling the relaxation area. Ask a licensed electrical professional to assess any outdoor electrical work.

A readily accessible outdoor area is enough for cooling down. Plan a shower, plunge pool or swimming pool only if the space and intended use justify it. Consider water supply, drainage, cleaning and winter shutdown where relevant. Run-off must not remain around the sauna base or make the path slippery. You can also reserve sufficient circulation space for a later addition.

As rest periods take place outside the HC 225 cabin, a sheltered seat nearby is practical. Arrange furniture, screening and plants so access, heater maintenance and intended safety areas remain clear. Maintain the required clearance from hot equipment and the flue.

Check thermowood regularly and clean it gently

UV light, rain and temperature changes can alter the colour and surface of thermowood over time; this is not automatically damage. What matters is that water does not remain in one place and dirt does not obstruct drainage. Keep the area around the barrel sauna clear so air can circulate and the timber can dry after rain.

Regularly check door operation, seals, visible screw connections and barrel bands. Components should not be adjusted as a precaution or without a clear reason. Check a stiff door, noticeable gaps or loose connections against the installation and care guidance before using the sauna intensively again.

Clean the interior using gentle methods and products suitable for sauna timber. Use as little water as possible and leave all surfaces open to dry afterwards. Harsh cleaners, abrasive tools and pressure washers can roughen wood fibres or force moisture into joints. The same principle applies outdoors: clean as dryly and gently as possible. Care products must suit thermally treated timber and the intended application.

Confirm contents, delivery route and local requirements early

Check your chosen configuration carefully before ordering. Suitability for a wood-fired heater does not automatically mean that the heater, sauna stones, chimney parts, heat shields and all installation accessories are included. The stated scope of supply is decisive. Also clarify what is planned for assembly, heater installation and flue work, and which tasks must be completed separately by suitable professionals.

Assess the complete route from the intended unloading point to the prepared site. Narrow gates, wall projections, steps, steep slopes, soft ground, low branches and tight turns can make moving large components difficult. Check height limits and turning space as well as available width. Keep access clear on delivery day and confirm in advance which lifting or moving aids are required for the selected delivery method.

Also check building consent and resource consent separately with the local council, based on the site, sauna, foundations and intended use. Confirm the rules for the solid-fuel heater and flue, including whether regional air-quality requirements apply, and ask a licensed electrical professional to assess any electrical installation. Obtain project-specific advice before fixing the base or chimney position. See Useful information for further guidance.

Assess seating comfort using the exact configuration

At an internal height of around 175 cm, personal comfort depends not only on body height but also on how you move through the space. Check whether regular users can enter comfortably, sit down on the bench and stand up again. Someone who wants to change inside the cabin or move upright frequently has different requirements from someone who will mostly sit.

Include the exact bench arrangement in your assessment. Where possible, compare stated dimensions with a familiar bench and allow for the room knees and legs need in your preferred position. This provides a more realistic indication of whether the selected version suits your own use.

If more upright freedom of movement is important, compare the HCF 225, which has an internal height of around 210 cm.

Does a wood-fired heater suit your routine?

Before every sauna evening, firewood, lighting material and necessary accessories must be ready. Heating requires active supervision, and residual heat and ash need proper handling afterwards. Consider whether this recurring routine suits daily life rather than choosing only by your preferred heat source.

Operation also includes tasks beyond the sauna session itself: storing firewood dry, keeping the heater area clean, leaving the chimney accessible and providing consumables in good time. Storage must be outside the hot cabin and must not restrict safety, access or work areas. Considering this in the garden design avoids improvised solutions later.

Where several people use the sauna, it should be clear who operates the heater and who ventilates, cleans and locks up afterwards. Children and inexperienced guests need appropriate supervision and clear advice about hot surfaces. The operating manual and requirements for installed components remain decisive for use and safety.

Good preparation protects components and supports final checks

Before assembly begins, the base, access route and storage area should be fully prepared. Delivered timber components need a clean, dry place protected from damage until installation. Check the delivery against its documentation and report visible discrepancies before parts are fitted. Open packaging so unsuitable tools cannot damage timber surfaces.

Follow the model-specific assembly instructions and do not alter load-bearing or heat-protection components without approved guidance. The rounded barrel structure must be aligned evenly; an unsuitable base cannot be corrected simply by tightening later. Doors and fittings can only be assessed reliably once the sauna is correctly positioned. Follow the component instructions and any applicable council requirements for the heater and chimney, and ask a licensed electrical professional to assess electrical connections. Carry out a visual and functional check before the first heat-up.

Keep assembly, operating and care documents together with information about the installed heater and chimney. This assists later cleaning, spare-parts enquiries and discussions with tradespeople. Photos of concealed cable routes or connection details can also be helpful. A documented handover is especially useful when assembly and technical installation are carried out by different businesses.

Ventilate fully and allow to dry after every session

Heat and moisture remain in the cabin after use. Use the intended ventilation options in accordance with the product and heater instructions, and allow sufficient time for timber surfaces to dry. Remove water containers, wet textiles and loose sauna accessories. Also check benches and floor for moisture or dirt before closing the door for an extended period.

Before long periods without use, the interior should be clean and dry. Check that ventilation openings are clear and that no textiles or organic residue remain inside. Do not cover the timber sauna airtight, as trapped moisture cannot escape as easily. Any additional weather cover must suit the construction and allow necessary ventilation.

Do not hide smells, dark damp patches or unusually slow drying with fragrances or surface treatments. First check whether rain is entering, water is being spilled during sauna use, or airflow is obstructed. If the cause cannot be clearly identified, seek professional advice.

Rainwater must drain freely from the outside

The rounded barrel form defines the appearance of the HC 225. Keep the immediate perimeter clear of soil, leaves and objects that retain moisture against the timber or make inspection difficult. After heavy rain, check that prepared drainage still works. Later-added beds, edging or paving must not alter the water route.

Overhanging branches, constantly spraying irrigation and dense planting can slow drying and obstruct access for care work. Enough space around the sauna makes it easier to inspect exterior timber, barrel bands and connections. Plants must not reach hot components or the flue. Before adding a roof or cladding, confirm that it is technically acceptable and compatible with the intended construction.

Keep the entrance and path clear and safe to walk on so the door can be operated freely. Do not use cleaning tools or products that can damage timber, fittings or adjacent surfaces. Before heating, briefly check that ventilation zones are open, access is clear and the chimney shows no visible irregularities. Also remove combustible items from required safety areas. This visual check does not replace regular professional maintenance.

Clear responsibilities are especially important at a holiday home

At a privately used holiday home, the HC 225 is particularly practical when the building already provides space for changing and dry towels. For longer absences, decide who will inspect the interior, door, ventilation openings and visible external components. Even an outdoor sauna that is not heated for a period should be checked and ventilated regularly.

Where changing guests use the sauna, operation of the installed wood-fired heater should be explained clearly. This includes suitable fuels, what to do if smoke occurs, handling hot surfaces, ventilation and final checks. Cleaning, maintenance, insurance and suitability for the planned use should also be clarified. Inexperienced people should not operate the wood-fired heater without instruction.

A documented check routine between stays makes supervision easier. Check for a clean, dry interior, proper door operation, clear access routes, and the visible heater area and chimney. Firewood and accessories must be stored neatly without using the sauna room or safety areas as storage. If faults are found, the sauna must not be used again until their cause has been professionally clarified.

FAQ – Bloomcabin HC 225