Štrus Air Termo Premium Sauna Indoor Sauna Thermoholz

Q: How much space do I need for an Indoor Sauna?

1. minimum distances for ventilationThe following guide values apply for sufficient ventilation and to avoid moisture damage:to interior walls: approx. 5-10 cmto exterior walls: min. 10 cmto the ceiling: min. 10 cmSome insulated premium systems manage with smaller distances.2. space for use and maintenancein front of the sauna door: approx. 60 cm free spaceControl and maintenance points must remain accessible3. space requirement in the interiorapprox. 1-1.5 m² per person2 Persons: approx. 2-3 m²4 Persons: approx. 4-6 m²An inside length of approx. 200 cm is recommended for loungers.4. room height & floorrecommended room height: at least 10 to 15 cm higher than the sauna heightFloor: flat and waterproof (e.g. tiles, stone)

Q: What power connection and heater output do I need?

Power connectionSauna heaters over 3 kW require a 400 V power supplyConnection exclusively by an authorized specialist companyRule of thumb oven performanceapprox. 1 kW per 1 m³ sauna volumeadditional approx. +1 kW per m² glass surfacefor solid wood saunas approx. +10-15 %

Q: How long does it take to heat up and what are the operating costs?

Heating time: approx. 30-45 minutes, for complete warming approx. 45-60 minutesPower consumption: approx. 6-9 kWh per sauna sessionThe actual costs depend on the heater performance, insulation and service life.

Q: Which type of sauna is right for me?

Finnish sauna: approx. 80-100 °C, dry heatBio-Sauna: approx. 50-60 °C, higher humidityCombination sauna: flexible between dry & wetInfrared: mild deep heatCombination saunas are considered to be particularly versatile and beginner-friendly.

Q: What are common causes of a sauna not heating up properly or smelling?

Typical causes areOven output too lowDirty or saturated sauna stonesInsufficient ventilationTechnical defects (e.g. heating elements)Many problems can be solved without replacing the heater.

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Wellness begins where your home becomes a source of tranquility

There are moments when a room is more than just a room—when warmth, wood, and silence merge into an experience. The Savne Štrus Air Termo Premium Indoor Sauna Indoor Sauna Thermoholz transforms any suitable indoor space into a private sauna retreat of the highest caliber. Thermally treated Nordic aspen envelops you in a warm, distinctive scent and creates the atmosphere essential for true relaxation.

Savne Štrus Air Termo Premium Innensauna - Wärmbehandeltes Holz mit Glastür, Holzbänken und LED-Beleuchtung im Badezimmer

What sets the Savne Štrus Air Termo Premium Indoor Sauna in thermowood apart as a collection

The Air Termo Premium collection by Savne Štrus represents the top tier of the Air line and combines a modern, wide-slat design with the superior properties of thermally modified wood. Seven distinct sauna types—from the compact single-story version for one person to the spacious corner sauna for up to eight Persons—offer a customized solution for virtually any space. The Savne Štrus Air Termo Premium Indoor Sauna thermowood Indoor Sauna can be configured as a Finnish sauna, a bio-sauna, Infrared Cabin, or a hybrid combination. Manufactured in the EU, this collection combines precision craftsmanship with contemporary standards of material quality and functional versatility.

Savne Štrus Air Termo Premium Innensauna mit wärmbehandeltem Holz, Saunaofen mit Steinen und Kelle

Thermally modified aspen and ESG safety glass—the materials used in the Air Termo Premium Indoor Sauna

All wall and ceiling elements are made of solid Nordic aspen, which undergoes heat treatment between 180 °C and 230 °C to achieve exceptional dimensional stability, moisture resistance, and reduced thermal conductivity. The modern STS4 profile with solid slats measuring 15 × 120 mm creates clean, straight lines and a contemporary, elegant surface effect. The fully glazed front panel, made of 8 mm thick ESG safety glass—available in clear, Parsol Gray, or Parsol Brown—is framed by a solid glass mask composed of thermally treated 21 × 90 mm aspen slats. Chrome-plated hardware and a 49 cm long door handle made of thermally modified wood underscore the sophisticated quality standards of the Savne Štrus Air Termo Premium Indoor Sauna Thermoholz.

Flexible technology and a variety of heaters in the Savne Štrus Air Termo Premium Indoor Sauna Thermoholz

The power range of the compatible sauna heaters extends from 3.5 kW for compact Type I cabins up to 10.5 kW for spacious models of Types III through VII. The smallest variant (Type I) can already be operated on a single-phase 230 V, 16 A connection—ideal for rooms without a high-voltage connection. Larger configurations operate on a 400 V three-phase connection at 16 to 25 A, with a recommended cable cross-section of 5 × 2.5 mm² (up to 9 kW) or 5 × 4 mm² (10.5 kW). Three control options—BASE, LUMEN, and TOUCH—allow for precise adjustment to Finnish, BIO, or infrared modes, optionally supplemented by WiFi remote access.

Seven types of saunas for individual needs – comfort with the Air Termo Premium Indoor Sauna

From the compact Type I with a single-level bench and a depth of just 130 cm to the spacious Type VII corner sauna with a width of 250 cm, the Savne Štrus Air Termo Premium Indoor Sauna in thermowood adapts to virtually any floor plan. The two-tier bench designs of Types II through VII offer a reclining width of 60 cm on both levels, with a cover between the upper and lower levels ensuring a tidy appearance. L-shaped bench configurations (Type IV), side glazing (Type V), and partial glazing (Type VI) each create their own spatial effects and usage possibilities. Optional upgrades such as linear ambient lighting, RGB lighting scenes, a starry sky, or a backlit salt wall enhance the sauna experience to suit personal preferences.

Savne Štrus Air Termo Premium Innensauna mit wärmbehandeltem Holz, Innenansicht mit Holzbänken und großem Fenster mit Ausblick

The Savne Štrus Air Termo Premium Indoor Sauna offers long-term benefits for both body and mind

Regular sauna use promotes blood circulation, supports muscle recovery, and can strengthen the immune system over the long term. When heated, the thermally modified Nordic aspen emits a pleasant, natural scent while remaining comfortably warm on the surface—a noticeable improvement in comfort compared to untreated woods. Since the Savne Štrus Air Termo Premium Indoor Sauna thermowood Indoor Sauna can be used as a classic Finnish sauna, a gentle organic variant, or Infrared Cabin, you can precisely adjust the temperature and humidity to suit your personal well-being. Having your own sauna in your living space saves you a trip to the spa and makes relaxation available at any time—an investment in quality of life that pays off every day.

Special features

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Custom-made in-house (Savne Štrus)

Each sauna is custom-designed and manufactured in Slovenia.

Aspen wood

It feels pleasant on the skin, does not warp, and is naturally antibacterial.

7 Wood Collections (Savne Štrus)

From Air Classic to Supreme—something for every style and budget.

Made in EU

High-quality manufacturing in the European Union – for tested quality, fair production standards, and short delivery routes.

Savne Štrus Air Termo Premium Innensauna - Wärmbehandeltes Holz mit Holzbänken und Glastür

Scope of delivery

Everything at a glance – this is what's included!

Wall panels made of solid 15 × 120 mm slats in thermally modified Nordic aspen (Trepetlika), featuring the modern STS4 profile with straight lines
Ceiling paneling in the same high-quality material
Glass panel framed by solid 21 × 90 mm slats made of thermally treated Nordic aspen
Solid wood benches made of thermally modified Nordic aspen (seating width 60 cm)
Single-level bench design (Air Termo Premium I) or two-level bench design with a cover between the upper and lower levels (Air Termo Premium II–VII)
Front panel (or corner glazing on Model VII) made of 8 mm tempered safety glass with chrome-plated fittings
60 cm wide glass door with a handle made of thermally treated wood (49 cm long)
Ambient two-point lighting (standard)
Fastening and installation hardware
Assembly Instructions

Specifications

Manufacturer	Štrus Saunas
Model / Collection	Air Termo Premium
Product Type	Indoor Sauna
Available Sauna Types	Type I (single-tier bench), Type II (double-tier bench with cutouts), Type III (double-tier bench), Type IV (double-tier L-L bench), Type V (double-tier bench with side glass), Type VI (double-tier bench with partial glass), Type VII (corner sauna)
Capacity	1–8 Persons (depending on the model)
External dimensions Type I (W × D × H)	140 × 130 × 205 cm / 160 × 130 × 205 cm / 180 × 130 × 205 cm / 210 × 130 × 205 cm / 210 × 140 × 205 cm
External dimensions Type II (W × D × H)	160 × 160 × 205 cm / 180 × 160 × 205 cm / 200 × 160 × 205 cm / 210 × 160 × 205 cm
External dimensions, Types III–VII (W × D × H)	210 × 180 × 205 cm / 210 × 200 × 205 cm / 220 × 220 × 205 cm / 250 × 200 × 205 cm
Internal dimensions Type I (W × D × H)	55 × 51 × 81 cm / 63 × 51 × 81 cm / 71 × 51 × 81 cm / 83 × 51 × 81 cm / 83 × 55 × 81 cm
Internal dimensions Type II (W × D × H)	63 × 63 × 81 cm / 71 × 63 × 81 cm / 79 × 63 × 81 cm / 83 × 63 × 81 cm
Internal dimensions, Types III–VII (W × D × H)	83 × 71 × 81 cm / 83 × 79 × 81 cm / 87 × 87 × 81 cm / 99 × 79 × 81 cm
Uniform exterior height	205 cm
Uniform interior height	81 cm
Weight	100–700 kg (depending on the model)
Wood Type Wall Paneling	Nordic aspen (Populus tremula), thermally modified at 180–230 °C
Wall Profile	STS4 profile, solid slats 15 × 120 mm
Wood Type Benches	Thermally modified Nordic aspen, seat width 60 cm
Wood type Glass frame	Thermally modified aspen, 21 × 90 mm profile
Glazing	8 mm tempered safety glass (ESG), clear (standard), optional Parsol Gray or Parsol Brown
Door width	60 cm
Door handle	Solid thermally treated wood, 49 cm long
Fittings	Chrome-plated (standard), black upon request
Ceiling paneling	Identical to wall paneling
Lighting (Standard)	Ambient two-point lighting
Type I power connection (small heaters)	230 V / single-phase / 16 A (for heaters up to 3.6 kW)
Type I electrical connection (larger heaters)	400 V / 3-phase / 16 A (for 4.5 kW heaters)
Type II power connection	400 V / 3-phase / 16 A
Power connection type III–VII	400 V / 3-phase / 16–25 A
Recommended cable cross-section	5 × 2.5 mm² (up to 9 kW), 5 × 4 mm² (10.5 kW)
Compatible heater power	3.5 kW to 10.5 kW (depending on the sauna type)
Sauna operating modes	Finnish, BIO, Infrared, Hybrid (depending on the choice of heater and control system)
Control options	BASE (Infrared + Finnish), LUMEN (Infrared + Finnish + BIO), TOUCH (Touch Control, Infrared + Finnish + BIO)
Installation	Exclusively through licensed electrical contractors
Manufacturing	Made in EU
Warranty	Quality Guarantee

Your premium indoor sauna made of thermowood is waiting for you

Discover the Savne Štrus Air Termo Premium Indoor Sauna in thermowood and design your own personal oasis of well-being—customized to fit your space, your style, and your needs. Start a new chapter in home wellness today.

Questions & Answers (FAQs)

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Indoor Saunas

How much space do I need for an Indoor Sauna?

1. minimum distances for ventilationThe following guide values apply for sufficient ventilation and to avoid moisture damage:

to interior walls: approx. 5-10 cm
to exterior walls: min. 10 cm
to the ceiling: min. 10 cm

Some insulated premium systems manage with smaller distances.

2. space for use and maintenance

in front of the sauna door: approx. 60 cm free space
Control and maintenance points must remain accessible

3. space requirement in the interior

approx. 1-1.5 m² per person
2 Persons: approx. 2-3 m²
4 Persons: approx. 4-6 m²

An inside length of approx. 200 cm is recommended for loungers.

4. room height & floor

recommended room height: at least 10 to 15 cm higher than the sauna height
Floor: flat and waterproof (e.g. tiles, stone)

Which rooms are suitable for an Indoor Sauna?

Dry indoor spaces such as cellars, bathrooms, living rooms or attics are suitable. The decisive factors are adequate ventilation, compliance with wall clearances and a suitable power connection. A window is not required.

Can I install an Indoor Sauna in a rented apartment?

Yes, many Indoor Saunas can be dismantled and are suitable for rental apartments. The prerequisites are suitable power connections, adequate spacing and ventilation. The consent of the landlord is recommended.

What power connection and heater output do I need?

Power connection

Sauna heaters over 3 kW require a 400 V power supply
Connection exclusively by an authorized specialist company

Rule of thumb oven performance

approx. 1 kW per 1 m³ sauna volume
additional approx. +1 kW per m² glass surface
for solid wood saunas approx. +10-15 %

Does an Indoor Sauna cause damp or mold?

With correct ventilation, sufficient wall spacing and regular airing after the sauna, no harmful moisture is produced. With proper planning, Indoor Saunas are not considered critical for living spaces.

How loud is an Indoor Sauna in operation?

Indoor Saunas work almost silently. The heater itself is silent, only the control unit or fan in bio/combi heaters are slightly audible. The volume is suitable for living rooms.

How long does it take to heat up and what are the operating costs?

Heating time: approx. 30-45 minutes, for complete warming approx. 45-60 minutes
Power consumption: approx. 6-9 kWh per sauna session

The actual costs depend on the heater performance, insulation and service life.

Which type of sauna is right for me?

Finnish sauna: approx. 80-100 °C, dry heat
Bio-Sauna: approx. 50-60 °C, higher humidity
Combination sauna: flexible between dry & wet
Infrared: mild deep heat

Combination saunas are considered to be particularly versatile and beginner-friendly.

What are common causes of a sauna not heating up properly or smelling?

Typical causes are

Oven output too low
Dirty or saturated sauna stones
Insufficient ventilation
Technical defects (e.g. heating elements)

Many problems can be solved without replacing the heater.

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What should I look out for before ordering?

Please check all relevant information about the product (dimensions, technical requirements, power/water connections, space requirements, delivery conditions) before ordering. If you have any questions, we recommend a consultation before purchasing, especially for larger wellness products.

Which payment methods are accepted?

We accept the following payment methods:

PayPal
Store Pay
Visa
Mastercard
American Express
Maestro
UnionPay
Apple Pay
Google Pay
USDC
Bancontact
EPS
iDEAL
Klarna

When is the load applied?

The amount is debited at the time the order is completed or according to the selected payment method. For payment services such as Klarna, the respective payment terms of the provider also apply.

Can I change or cancel my order at a later date?

Changes or cancelations are possible as long as the order is not yet in production, commissioning or shipping. Please contact us immediately after placing your order.

Are there any restrictions on the right of withdrawal?

Yes, custom-made products, special designs and individually configured goods are excluded from the statutory right of withdrawal. We will clarify transparently whether a product falls under this before or at the latest when the order is placed.

How long does the delivery take and will I be informed?

The delivery time is indicated directly with the respective product. These are valid as long as the item is in stock. Deviating, individually agreed delivery times have priority. We will actively inform you in the event of delays. You will receive ongoing information on the shipping status.

How does delivery by forwarding agent work?

Delivery is standard free curbside. This means that the goods are delivered to the nearest point that can be reached by truck.

Important:

Access for trucks must be possible
Sufficient clearance width and height required
The customer is responsible for transportation from the curb
If required, additional services (e.g. delivery to the installation site) can be arranged in advance

Can I set a preferred delivery date?

Delivery date requests will be considered if possible. The shipping company will usually contact you one to two days before delivery to arrange an appointment. Fixed dates or times cannot be guaranteed. Express deliveries with exact delivery dates are possible on request.

What applies in the event of damage, missing parts or subsequent defects?

Please check the goods immediately upon delivery. Transport damage or missing parts must be documented and reported immediately with photos/videos.

The statutory warranty of 2 years applies to defects. We examine every case and take care of repair, replacement or an appropriate solution.