Thermasol Spectra Outdoor Sauna | 3–4 Person, Tyrol Panel, 8kW Harvia WiFi, Color Glass Exterior | Free Shipping
Thermasol Spectra Outdoor Sauna | 3–4 Person, Tyrol Panel, 8kW Harvia WiFi, Color Glass Exterior | Free Shipping
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Add White-Glove Backyard Placement — a local two-person crew uncrates your item, carries it to your spot, places it, and hauls the packaging away. Placement $279 · Placement + Assembly $489. Hot tubs and saunas are quoted individually.
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The Thermasol Spectra is a 3–4 person outdoor sauna defined by its vivid-colored thermal glass exterior in black aluminum framing — a design statement that makes the Spectra one of the most visually distinctive saunas in any outdoor space. Inside, thermally modified Tyrol panel walls and aspen benches create a warm, textured interior. The 8kW Harvia Virta with WiFi is standard. 34mm Parsol Dark Grey glass, STEICO wood fiber multi-layer insulation, a Firestone EPDM weatherproof roof, and RGB LED lighting complete the specification. 90" × 82" × 91" exterior. $36,092 with free shipping.
Why Customers Choose This Product
- Vivid-colored thermal glass exterior in black aluminum framing — unlike any wood-clad sauna
- 34mm Parsol Dark Grey glass facade
- Thermally modified Tyrol panel interior walls with aspen benches
- 8kW Harvia Virta with WiFi included as standard — smartphone control via the Harvia app
- STEICO wood fiber multi-layer insulation and a Firestone EPDM weatherproof roof
- RGB LED lighting with remote control
Product Highlights
Vivid-Colored Thermal Glass Exterior — The Spectra's Signature
The Spectra's defining feature is its exterior: a vivid-colored thermal glass facade framed in black aluminum. Where most outdoor saunas present a wood exterior — natural, thermally modified, or stained — the Spectra leads with color glass, and the black aluminum framing sharpens the panel against the thermally modified Tyrol panel cladding. Named for the spectrum of light and color, the Spectra is the Thermasol sauna for homeowners who want the exterior to be as considered as the interior.
34mm Parsol Dark Grey Glass
The Spectra uses 34mm Parsol Dark Grey Glass — a heavy glass specification that provides strong thermal retention at the facade and a structurally substantial presence. The dark grey tint complements the vivid exterior color rather than competing with it, provides privacy from outside, and maintains a light-filled interior.
Thermally Modified Tyrol Panel Interior
Inside the Spectra, the walls are finished in thermally modified Tyrol panels, a textured wall treatment that adds visual depth and surface texture to the interior. Combined with thermally modified aspen benches, the interior has a warm, tactile material quality, and the thermal modification applied to both the panels and the cladding supports consistent moisture resistance and dimensional stability through repeated sauna use.
8kW Harvia Virta with WiFi — Standard
The Spectra comes standard with the 8kW Harvia Virta with WiFi. The Virta connects to your 2.4GHz home WiFi network and is controlled via the Harvia app on your smartphone: start preheating remotely, monitor temperature, and arrive to a ready sauna. At 8kW for a 3–4 person outdoor sauna, the heater output is well-matched to the Spectra's insulated enclosure.
STEICO Wood Fiber Insulation and Firestone EPDM Roof
The Spectra's multi-layer insulation uses STEICO wood fiber, a sustainable insulation material made for performance in moisture-variable environments — it handles the humidity cycling of sauna use without compressing, degrading, or losing thermal performance over time. The Firestone EPDM weatherproof roof is a single-ply rubber roofing membrane used in commercial and high-performance residential construction for its weather sealing and UV resistance, and it does not crack, lift, or lose seal integrity through temperature cycling the way shingles can.
RGB LED Lighting
The Spectra includes RGB LED lighting with remote control as standard. The full RGB spectrum is available in the interior lighting system, and color and intensity can be adjusted during the session without leaving the bench — pairing with the vivid color glass exterior to make color a design principle of the sauna rather than an accessory.
Specifications
| Brand | Thermasol |
|---|---|
| Model | Spectra |
| Capacity | 3–4 people |
| Exterior Dimensions | 90" × 82" × 91" (approx.) |
| Heater | 8kW Harvia Virta with WiFi (standard) |
| Interior Walls | Thermally modified Tyrol panels |
| Interior Benches | Thermally modified Aspen |
| Exterior | Thermally modified Tyrol panel with vivid-colored thermal glass facade |
| Glass | 34mm Parsol Dark Grey Glass (PSDG) |
| Framing | Black aluminum |
| Insulation | Multi-layer STEICO wood fiber |
| Roof | Firestone EPDM weatherproof |
| Lighting | RGB LED lighting with remote |
| Controls | Digital with WiFi (smartphone control) |
| Use | Outdoor, year-round |
| Price | $36,092 |
| Shipping | Free |
Ideal For
- Homeowners who want a full-featured Thermasol sauna with a design-forward exterior presence
- Those for whom the exterior look of the sauna matters as much as the interior — the Spectra's color glass facade is the feature that makes it the right choice
- Outdoor spaces where a distinctive sauna exterior contributes to the overall garden or landscape design
- Buyers who want WiFi heater control included as a standard feature
- Year-round outdoor sauna use in any climate, supported by STEICO insulation and Firestone EPDM roofing
Important Information
Electrical required: the 8kW Harvia Virta heater requires a dedicated 240V outdoor-rated electrical circuit (typically 40A), installed by a licensed electrician. The circuit is not included — confirm exact specifications before ordering so the circuit is ready before delivery. The Harvia Virta WiFi requires a 2.4GHz WiFi network within range of the sauna location.
Site and installation: a level, solid surface is required — a concrete pad or solid pavers — and site preparation is not included. Professional installation is recommended. A permanent outdoor structure with an electrical connection may require a building permit; verify local requirements before ordering.
Delivery: free shipping on this item. Orders are typically processed and shipped within 2–10 business days, with Economy (5–15 business days) or Standard (3–14 business days) delivery at checkout. A tracking number is emailed once shipped and is active within 24 hours. Orders are not shipped or delivered on weekends or holidays.
Frequently Asked Questions
What makes the Spectra different from the Fortis?
The Spectra has a vivid-colored thermal glass exterior with black aluminum framing, 34mm glass, Tyrol panel interior walls, the 8kW Harvia Virta with WiFi as standard, STEICO wood fiber insulation, and a Firestone EPDM roof. The Fortis has a plain wood exterior, an 8mm glass door, aspen interior walls, and a 9kW heater as standard. Choose the Spectra for the design-forward exterior and WiFi included; choose the Fortis for a more traditional enclosed profile and slightly higher heater output.
Is WiFi control included or optional?
The 8kW Harvia Virta with WiFi is standard on the Spectra — included at the listed $36,092 price, with no upgrade required. It is controlled via the Harvia app on your smartphone over your 2.4GHz WiFi network.
What is STEICO insulation?
STEICO is a sustainable wood fiber insulation material engineered for performance in moisture-variable environments. It handles the heat-and-humidity cycling of sauna use without degrading, compressing, or losing thermal performance over time — a more durable insulation specification than standard foam or mineral wool in a sauna application.
What electrical connection is required?
The 8kW Harvia Virta requires a dedicated 240V circuit, typically 40A, installed by a licensed electrician. Confirm exact specifications before ordering so the circuit is ready before delivery.
The Thermasol Spectra is the outdoor sauna that earns its name — a vivid color glass exterior, full RGB spectrum interior lighting, Tyrol panel walls, and a Harvia Virta WiFi heater as standard. At $36,092 with free shipping, it is the design-forward choice in the Thermasol line.
This product is a recreational sauna and is not a medical device. It is not intended to diagnose, treat, cure, or prevent any disease or health condition. Consult your physician before using a sauna if you are pregnant, have a medical condition, or take medication. Stop use and seek medical advice if you feel unwell at any point.
