Harvia Solide Large Indoor Traditional Sauna

Complete Specifications & System Overview
  • Product name: Harvia Solide Traditional Indoor Sauna
  • Product type: Indoor traditional sauna
  • Model number: S2125LD
  • Capacity: 4–6 people
  • Heater: Commercial-grade Harvia Virta 9.0 kW
  • Control: Harvia Xenio Wi-Fi digital touch control
  • Heating method: Traditional electric stone heater
  • Lighting: Integrated remote-controlled LED chromotherapy
  • Installation format: Flat-packed structural wood cabin
  • Exterior material: Nordic spruce
  • Interior and seating material: Premium ash
  • Front wall: Full-height tempered safety glass
  • Foundation: Anti-humidity base with adjustable leveling legs
  • Intended environment: Residential indoor installation
  • Manufactured in Finland

Manufacturer & Country of Origin

Manufactured by Harvia Oyj
Muurame, Finland

Country of origin: Finland

What’s Included

  • One complete Harvia Solide structural indoor wood cabin shell
  • Nordic spruce exterior and structural components
  • Premium ash interior seating
  • Commercial-grade Harvia Virta 9.0 kW electric heater
  • Full-capacity set of selected Finnish sauna stones
  • Harvia Xenio Wi-Fi digital touch control
  • Control power unit
  • Temperature sensor
  • Door sensor and remote-start safety equipment
  • Integrated 8 mm full-height tempered-glass front wall
  • Integrated tempered-glass entrance door
  • Premium ergonomic ash seating benches
  • Integrated remote-controlled LED chromotherapy
  • Dual-ventilation infrastructure
  • Stainless steel sauna bucket
  • Stainless steel ladle
  • Sauna thermometer
  • Anti-humidity foundational base
  • Adjustable leveling legs
  • Heavy-duty structural assembly hardware
  • Step-by-step installation manual

Electrical installation, delivery, site preparation, flooring, drainage, mechanical ductwork, and professional assembly are separate unless specifically included on the client’s invoice.

  • Substantial architectural form
  • Nordic spruce structural shell
  • Light and dark finish contrast
  • Full-height glass frontage
  • Integrated glass entrance door
  • Clean-lined Scandinavian profile
  • Finished structural wood surfaces
  • Configurable wood treatment
  • Anti-humidity foundational base
  • Adjustable leveling legs
  • Designed for integration into a dedicated interior wellness space

Wood surfaces may be left natural or treated with a manufacturer-approved tinted sauna finish or wax.

  • Designed for 4–6 occupants
  • Premium ash seating
  • Multi-level bench arrangement
  • Elevated upper benches position occupants within the warmer part of the cabin
  • Lower seating and foot platforms improve entry and movement
  • Ergonomic bench proportions
  • Coordinating backrests
  • Continuous seating supports group use
  • Full-height glass frontage increases visual space
  • Heater positioned to support balanced circulation
  • Bench components tailored to the cabin dimensions

  • Structural wood: Nordic spruce
  • Interior finish: Premium ash
  • Bench material: Premium ash
  • Wall and ceiling construction: Substantial prefabricated timber elements
  • Structural thickness: Approximately 56 mm
  • Glass: Clear tempered safety glass
  • Glass thickness: 8 mm
  • Foundation: Moisture-resistant base construction
  • Leveling system: Adjustable legs
  • Heavy-duty structural connections
  • Prefabricated wall and ceiling components
  • Finished visible wood surfaces
  • Flat-packed delivery format
  • Complete assembly hardware included

Natural differences in grain, color, knots, and minor timber movement are expected characteristics of genuine wood.

  • Substantial wood wall and ceiling elements
  • Solid timber construction provides natural thermal mass
  • Tight-fitting prefabricated structural components
  • Glass frontage included in the heater-sizing calculation
  • Interior timber surfaces absorb and release heat gradually
  • Anti-humidity base helps separate structural wood from floor moisture
  • Final wall construction must be installed according to Harvia’s assembly instructions
  • Open joints, missing seals, or improper assembly can reduce thermal performance
  • Traditional electric sauna heating
  • Floor-standing Harvia Virta heater
  • 9.0 kW heating output
  • High-capacity stone compartment
  • Radiant and convective heat
  • Water may be applied to the stones to create leil
  • Large stone mass supports sustained heat and generous steam
  • Internal heater airflow supports warm-up
  • Heating elements separated from direct stone pressure
  • Front-mounted maintenance hatch
  • Replaceable heating-element module
  • Controlled through the included Xenio Wi-Fi control

  • Heater family: Harvia Virta
  • Common North American model: HL9U1 or current equivalent
  • Nominal output: 9.0 kW
  • Operating voltage: 240 V AC
  • Phase: Single phase
  • Frequency: 60 Hz
  • Recommended room volume: Approximately 177–494 cu. ft. / 5–14 m³
  • Approximate width: 415 mm / 16.3 in.
  • Approximate depth: 340 mm / 13.4 in.
  • Approximate height: 840 mm / 33.1 in.
  • Heater weight without stones: Approximately 23 kg / 50.7 lb.
  • Full stone capacity: Approximately 50 kg / 110 lb.
  • Required stone size: Approximately 50–100 mm / 2–4 in.
  • Minimum published room height: Approximately 1900 mm / 75 in.
  • Published combustible-material clearance: Approximately 51 mm / 2 in. on applicable sides
  • Floor-standing installation
  • External Xenio power unit required
  • Front-access service hatch

The supplied heater nameplate and current installation manual govern final electrical requirements and safety clearances.

  • Full required quantity included
  • Harvia-approved Finnish sauna stones
  • Approximate total stone capacity: 50 kg / 110 lb.
  • Required stone size: Approximately 50–100 mm / 2–4 in.
  • Natural stone shapes support airflow through the heater
  • Large stone mass supports stable heat
  • Stones must be stacked according to the Virta manual
  • Stones must not place direct pressure against the heating elements
  • Open airflow must be maintained between the stones
  • Natural variations in stone size, shape, and color are expected
  • Designed for traditional high-temperature sauna use
  • Final temperature range is governed by the Xenio control and regional safety settings
  • 9.0 kW output selected for the cabin’s volume and glass frontage
  • High stone capacity supports stable temperatures
  • Water applied to the stones creates adjustable steam
  • Multi-level seating provides different perceived heat zones
  • Solid timber construction supports heat retention
  • Heat-up time depends on ambient conditions, ventilation, electrical supply, and starting temperature
  • Water quantity and stone temperature influence steam intensity

Harvia Virta Heater

  • Nominal output: 9.0 kW
  • Operating voltage: 240 V AC
  • Phase: Single phase
  • Frequency: 60 Hz
  • Approximate nominal current: 37.5 A
  • Dedicated, hardwired electrical circuit required
  • Final breaker size must follow the heater nameplate and current Harvia manual
  • Proper grounding required
  • Sauna-rated, heat-resistant conductors required where applicable
  • No extension cords or power strips
  • Installation by a licensed electrician required

Xenio Control and Accessories

Electrical provisions must also be coordinated for:

  • Xenio power unit
  • Xenio Wi-Fi touch panel
  • Temperature sensor
  • Door sensor
  • Remote-start safety equipment
  • LED chromotherapy lighting
  • Lighting receiver and power supply
  • Mechanical ventilation equipment, if required

The final electrical schedule must be based on the exact supplied model numbers and local electrical code.

The included Xenio Wi-Fi control provides digital and connected operation of the Virta heater.

Features include:

  • Illuminated digital touch controls
  • Wi-Fi connectivity
  • MyHarvia mobile-app access
  • Remote heater start
  • Remote temperature adjustment
  • Heating-status monitoring
  • Sauna-ready notifications
  • Timed starting
  • Weekly scheduling
  • Session-time adjustment
  • Temperature calibration
  • Power-outage memory
  • Door-sensor monitoring
  • Remote-start safety status
  • Lighting control when connected
  • Ventilation control when compatible equipment is connected
  • Software updates through the MyHarvia application

The Xenio control panel should be installed where it can maintain a reliable Wi-Fi connection.

Remote operation requires the door sensor and all specified safety equipment to be properly installed and activated. The heater and surrounding area must be clear before any scheduled or remote start.

Integrated multi-color LED chromotherapy is included.

Features include:

  • Remote-controlled operation
  • Multiple color selections
  • Adjustable lighting modes
  • Ambient illumination across the interior
  • Architectural integration with the cabin
  • Low-profile LED installation
  • Independent lighting receiver
  • Dedicated lighting power supply
  • Heat-appropriate components in approved locations
  • Lighting designed to complement the glass, spruce, and ash interior

The chromotherapy lighting requires a separate or coordinated electrical connection from the heater circuit.

  • Full-height glass front wall
  • Integrated glass entrance door
  • Clear tempered safety glass
  • Glass thickness: 8 mm
  • Panoramic interior sightlines
  • Increased natural light
  • Creates a more visually open interior
  • Structural glass hardware included
  • Door and front wall installed as part of the cabin assembly
  • Glass requires careful multi-person handling
  • Glass must not contact tile, stone, metal, or other hard surfaces during installation
  • Integrated dual-ventilation infrastructure
  • Fresh-air intake supports heater performance
  • Exhaust pathway supports air exchange
  • Ventilation assists with drying after use
  • Intake and exhaust positions coordinated with the Virta heater
  • Airflow should not create a direct draft across the benches
  • Mechanical fans, external ductwork, grilles, and HVAC labor are separate unless listed on the invoice
  • Compatible ventilation equipment may be operated through the Xenio control
  • Final ventilation design must follow the cabin and heater installation instructions
  • Moisture-resistant foundational construction
  • Separates primary structural wood from direct floor moisture
  • Adjustable leveling legs
  • Supports accurate cabin alignment
  • Helps compensate for minor floor variation
  • Improves stability of the structural shell
  • Supports airflow beneath designated structural areas
  • Does not replace required floor waterproofing or drainage
  • Indoor installation only
  • Requires a stable, level, load-bearing floor
  • Floor must support more than 1,500 lb. of cabin weight plus the heater, stones, occupants, and surrounding finishes
  • Structural review may be required for elevated floors
  • Flooring should be heat resistant, moisture resistant, and cleanable
  • Waterproofing, tile work, drainage, and floor transitions are site-preparation items
  • Plumbing is not required for normal operation
  • Water is applied manually to the heater stones
  • Any floor drain must be coordinated according to local code
  • Delivery access must accommodate oversized and exceptionally heavy components
  • Adequate ceiling and side clearance must be provided for assembly
  • Future service access must be maintained

Included accessory set:

  • Stainless steel sauna bucket
  • Stainless steel ladle
  • Sauna thermometer

The thermometer should be installed according to Harvia’s placement instructions and should not be positioned directly above or beside the heater unless specified.

  • Delivered in a flat-pack format
  • Prefabricated structural wood components
  • Foundational base assembled and leveled first
  • Wall elements secured to the base
  • Ceiling elements installed after the walls
  • Glass front wall and door installed using supplied hardware
  • Benches and backrests installed according to the layout drawings
  • Heavy-duty structural assembly hardware included
  • Step-by-step manual included
  • Professional assembly strongly recommended
  • Licensed electrician required for the heater, Xenio control, sensors, and lighting
  • Ventilation work completed by a qualified trade where required
  • Glass components require careful multi-person handling
  • Heater clearances established before final bench placement
  • Electrical, lighting, sensor, and ventilation routes planned before assembly
  • Service access to the heater and power unit must remain available
  • Harvia cabin warranty covers qualifying material and manufacturing defects under its published terms
  • Cabin, heater, control, lighting, and accessory warranty periods may differ
  • Residential Harvia coverage is generally 2 years, subject to final written terms
  • Commercial warranty terms differ
  • Coverage requires correct installation, operation, and maintenance
  • Improper electrical work, incorrect assembly, misuse, unauthorized modification, unsuitable site conditions, and inadequate maintenance may be excluded
  • Front wall and door use 8 mm tempered safety glass
  • North American heater and control components must carry the required regional certifications
  • Xenio Wi-Fi controls are available in ETL-certified North American configurations
  • Final certifications must be verified against the exact supplied model numbers
  • Electrical inspection and approval must follow local requirements
  • Remove visible moisture after use
  • Leave the glass door partially open
  • Operate ventilation as needed to dry the cabin
  • Use bench towels to protect the ash surfaces
  • Clean timber with warm water and a mild sauna-approved cleaner
  • Clean in the direction of the wood grain
  • Avoid chlorine, harsh chemicals, and abrasive products
  • Use only Harvia-approved wood treatments
  • Clean glass with a non-abrasive, glass-safe product
  • Keep the anti-humidity base clear of accumulated water and debris
  • Inspect leveling legs and structural connections periodically
  • Inspect benches, backrests, glass fittings, lighting, door hardware, and ventilation openings
  • Inspect and restack sauna stones at least annually
  • Replace cracked, crumbling, or heavily discolored stones
  • Maintain open airflow between the stones
  • Follow the Virta manual when loading or replacing stones
  • Keep the heater’s front maintenance hatch accessible
  • Inspect the Xenio control, temperature sensor, and door sensor regularly
  • Arrange qualified electrical and safety inspections as required