A Spacious Outdoor Sauna with a Separate Changing Room.
The Square 4 Outdoor Traditional Sauna combines a dedicated heated sauna room with a separate changing area in a rounded rectangular cabin. Its light hemlock finish and large front window create an inviting setting for shared sauna sessions.
Listed for 8–10 people, this configuration offers more room than the smaller Square-series models. The supplied series sheet specifies a Harvia SW80 8 kW electric sauna heater, subject to confirmation for the final cabin and electrical configuration.
This is a traditional electric heated-stone sauna, not an infrared cabin or a dedicated steam room.
Key Features at a Glance
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Listed 8–10 Person Capacity: Actual comfort depends on user size and the approved bench layout.
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Separate Changing Room: A dedicated space for preparing before a session and changing afterward.
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Hemlock Wood Finish: Light wood tones and natural grain complement the outdoor cabin design.
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Large Front Window: Provides an outward view from the sauna room.
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Traditional Electric Heating: Proposed Harvia SW80 8 kW heated-stone configuration.
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Exterior Weather Protection: Specified PU waterproof fabric and wooden weather-shedding components.
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Hardwired Supply: Professional electrical installation and commissioning required.
Two Rooms for a More Complete Sauna Setup
The separate changing area provides a transition space between the outdoors and the heated sauna room. Confirm its furnishings, internal access, and privacy arrangements against the approved floor plan.
Compared with Square 3, Square 4 has wider listed interiors in both rooms. Review actual bench lengths, seating depths, heater placement, and circulation space before selecting the model.
The stated capacity does not establish simultaneous reclining space for all users or additional seating capacity in the changing room.
Hemlock Wood and Front Glazing
The supplied series description specifies Canadian hemlock. Its light appearance and natural grain complement the cabin's rounded exterior profile.
Natural wood varies in color and grain and can move with temperature and humidity changes. Follow the approved instructions for ventilation, drying, cleaning, and exterior maintenance.
Wood surfaces can become hot during use. No claim is made that benches remain cool, prevent burns, or are permanently free from splinters.
Consider surrounding sightlines and lighting when selecting the installation position, particularly where changing-room privacy is important.
Traditional Heated-Stone Sauna
The electric sauna heater warms the cabin through heated stones and air. Small amounts of suitable water may be applied to approved stones only where permitted by the exact heater manual.
This creates brief bursts of steam rather than the continuous humid environment of a dedicated steam room. A separate steam generator or infrared heating system is not specified.
Follow the heater instructions for stone loading, water quality and quantity, controls, ventilation, and safety clearances. Do not pour water onto electrical components or use unapproved additives.
Product Specifications
| Item |
Listed Specification |
| Model |
Square 4 |
| Sauna Capacity |
8–10 people, subject to user size and bench layout |
| Layout |
Sauna room with a separate changing room |
| Wood |
Specified Canadian hemlock |
| Exterior Dimensions |
Approximately 157 in W × 91 in D × 83 in H |
| Sauna Interior Dimensions |
Approximately 95 in W × 81 in D × 79 in H |
| Changing-Room Interior Dimensions |
Approximately 56 in W × 81 in D × 79 in H |
| Door Glass |
Series-listed 0.32 in tempered glass; confirm the applicable doors and window glazing separately |
| Proposed Heater |
Harvia SW80; suitability requires confirmation for the final heated room |
| Listed Heater Power |
8,000 W / 8 kW |
| Listed Supply Voltage |
220–240 V; exact heater version and supply requirements to be confirmed |
| Electrical Connection |
Dedicated hardwired circuit |
| Source Electrical Listing |
40 Amp; final circuit design requires professional confirmation |
| Listed Maximum Temperature |
194°F / 90°C, subject to approved controls and operating instructions |
Specifications come from the supplied Square-series comparison sheet. Confirm final dimensions, seating capacity, bench layout, glazing, shipping weight, and installation clearances before ordering. The changing room is not specified as separately heated. Listed maximum temperature is not a recommended setting for every user or a guarantee in all weather conditions.
Heater Sizing and Electrical Installation
The supplier must confirm that the selected heater is suitable for the effective heated-room volume, including glazing, construction, and insulation. An 8 kW listing alone does not establish correct sizing for the final cabin.
The changing room should not be assumed to form part of the intended heated space.
This sauna is not a standard household plug-in appliance. A licensed electrician must confirm voltage, phase, frequency, circuit protection, cable sizing, earthing, isolation, and any required residual-current protection.
The source sheet lists 40 Amp, but the final circuit must follow the actual heater nameplate, manufacturer instructions, and local requirements. Confirm controls and any separate lighting supply before ordering.
Outdoor Placement and Assembly
Prepare a level, structurally suitable, well-drained base for the complete two-room cabin. Allow additional space for assembly, door operation, ventilation, electrical servicing, and maintenance.
The exterior weather-protection description includes PU waterproof fabric and wooden weather-shedding components. Confirm installation and care requirements; these materials do not establish guaranteed leak-free performance or suitability for every climate.
Review local requirements, foundation needs, drainage, and applicable wind or snow considerations. Follow the approved ventilation layout and maintain all heater clearances.
Confirm packing dimensions, site access, unloading equipment, and assembly responsibilities before shipment.
Proposed Package Inclusions
- Hemlock cabin components for the sauna and changing-room layout
- Specified exterior weather-protection components
- Doors, glazing, and partitions according to the approved drawing
- Sauna bench seating and backrests as specified
- Confirmed electric heater configuration and mounting accessories
- Approved sauna stones, bucket, and ladle as specified
- Lighting and storage accessories where expressly listed
The signed quotation and approved specification determine all included items. Confirm changing-room furnishings, heater controls, stone quantity, lighting ratings, and the complete parts schedule.
Foundations, site wiring, electrical work, delivery, unloading, assembly, permits, and additional changing-room equipment are included only when expressly listed.
Safe Use and Routine Care
Follow the sauna and heater instructions. Stay hydrated, avoid alcohol, and leave immediately if you feel dizzy, nauseated, unusually weak, or uncomfortable.
People who are pregnant, have relevant medical conditions, or take medicines affecting heat tolerance should seek medical advice before use. Children require appropriate supervision and age-specific guidance.
Never cover the heater or place combustible items within its required clearances. Check the sauna before switching it on.
Dry and ventilate both rooms after use. Inspect wood, glazing, stones, lighting, and fittings according to the maintenance instructions.
This product is intended for recreational sauna use, not detoxification, weight loss, or treatment of medical conditions.
Certification and Warranty
Request certification documentation for the exact Square 4 configuration and heater version. A listing for an individual component or another model does not establish certification of the complete cabin.
No explosion-proof lighting certification is claimed in this description.
Obtain written warranty terms for the cabin, heater, glazing, lighting, and other components, including responsible providers, coverage periods, exclusions, maintenance conditions, and claim procedures.
Plan Your Outdoor Sauna Project
Share your installation location, electrical supply, site access, and preferred service package to begin planning.
Contact us for installation drawings, current specifications, package inclusions, and a tailored quotation.
Frequently Asked Questions
How many people can use Square 4?
The listed sauna capacity is 8–10 people. Confirm seating dimensions and the approved layout; actual comfort depends on user size, and simultaneous reclining space is not established.
Does it include a changing room?
Yes. Square 4 includes a separate changing-room area. Confirm its furnishings, internal access, and privacy arrangements in the approved specification.
Is the changing room heated?
Separate changing-room heating is not specified. Do not assume the sauna heater is intended to heat both rooms.
What are the exterior dimensions?
The series sheet lists approximately 157 inches wide × 91 inches deep × 83 inches high. Additional assembly, ventilation, and servicing clearances are required.
How does Square 4 differ from Square 3?
Both include a changing room. Square 4 has a listed sauna-room width of 95 inches and changing-room width of 56 inches, compared with 83 inches and 44 inches respectively for Square 3.
Which heater is listed?
The series sheet lists a Harvia SW80 8 kW heater. The supplier must confirm its suitability for the effective room volume, glazing, construction, and installation market before finalizing the order.
Is it a steam room or an infrared sauna?
No. It is a traditional electric heated-stone sauna. Water-on-stone use may briefly increase humidity where permitted by the exact heater manual.
Can it use a normal household outlet?
No. The proposed configuration requires a dedicated hardwired supply installed by a licensed electrician according to the actual heater requirements and local rules.
Are changing-room furnishings included?
Only expressly listed items are included. Confirm benches, hangers, racks, lighting, and other furnishings in the quotation.
Are delivery and installation included?
Only when expressly listed. Confirm delivery, unloading, assembly, foundations, and electrical installation separately.
What certification and warranty apply?
Request documentation for the exact cabin and supplied components. Heater certification and warranty terms should not be assumed to cover the complete sauna assembly.
