The Harvia The Wall SW80 is an 8kW wall-mounted electric sauna heater for rooms up to 424 cubic feet, finished in black. This listing is the heater only. An external Xenio or Fenix control unit and sauna stones are required for operation and are sold separately. The SW80 is the black-finish, external-control variant of The Wall 8kW - part of the SW series, which has no built-in controls and must be paired with a separate control panel. For buyers who want Xenio or Fenix WiFi app control with remote preheat built into the installation from the start, the SW80 with a CX30-U1-U3-XW or FX30-U1-U3-XC is the appropriate configuration. For buyers who want built-in controls without a separate purchase, the SWS80 (stainless, built-in controls) is the alternative within The Wall 8kW range.
The Wall design - ultra-thin profile, architectural wall-panel format
Harvia The Wall series is designed for sauna rooms where the heater should occupy as little visual and physical space as possible. The ultra-thin wall-mounted profile presents an almost flat surface to the room - the sauna stones are visible in the shallow basket, the black face of the SW80 reads as a minimal panel element rather than a projecting appliance, and the bench and floor space remain fully unobstructed. The black finish of the SW80 is the darker option in The Wall series, suited to sauna rooms with dark timber species, charcoal or slate tile, black hardware, and contemporary monochrome interiors where the heater should recede into the dark material palette. For lighter interiors where a brighter reflective surface is preferred, the SWS80 (stainless) or SWS80 Package is available.
SW series - external control required, Xenio or Fenix WiFi from day one
The SW series (SW60, SW80) has no built-in controls and cannot operate without a separate external control unit. A Xenio CX30-U1-U3-XW or Fenix FX30-U1-U3-XC control unit must be purchased and installed alongside the heater. This is the defining difference from the SWS series (SWS60, SWS80), which has integrated controls. The external control requirement of the SW80 is an advantage for buyers who want Xenio or Fenix WiFi connectivity built in from the start: both the CX30-U1-U3-XW and the FX30-U1-U3-XC have WiFi included, providing remote preheat, scheduling, and temperature monitoring via the MyHarvia or MyHarvia 2 app without any add-on purchase. The control panel can be positioned independently of the heater - at the most convenient point on the sauna wall or in the adjacent changing room - rather than being fixed to the heater face as with the SWS series built-in controls.
8kW black - the larger SW output in the darker finish
The Wall series covers two output levels at this finish: 6kW (SW60, up to 318 cu ft) and 8kW (SW80, up to 424 cu ft). The SW80 at 8kW is the larger, for rooms up to 424 cubic feet. Both are available in stainless or black finish with external control, and both have built-in control SWS equivalents. For rooms up to 318 cu ft where the SW60 is sized correctly, the smaller 6kW model is the appropriate choice. For rooms from 319 to 424 cu ft where the SW60 cannot provide sufficient output, the SW80 is the correct The Wall selection. Sauna stones are sold separately for both models.
8kW wall-mounted sauna heater for rooms up to 424 cubic feet. Black finish. Ultra-thin profile - architectural wall-panel format. External control required - Xenio CX30-U1-U3-XW or Fenix FX30-U1-U3-XC (both include WiFi, sold separately). No built-in controls (SW series). Sauna stones sold separately. 240V / 1-phase. ETL Listed. Made in Finland by Harvia.
8 kW Up to 424 cu ft Black finish Ultra-thin wall-mounted profile External Xenio or Fenix control required CX30-U1-U3-XW or FX30-U1-U3-XC - both include WiFi No built-in controls (SW series) Stones sold separately 240V / 1-phase ETL Listed Made in Finland by Harvia
Specifications
Electrical
| Power output |
8 kW |
| Voltage |
240V / 1-phase / 60 Hz |
| Built-in controls |
No - external control required (SW series) |
| Required control units |
Xenio CX30-U1-U3-XW or Fenix FX30-U1-U3-XC (sold separately) |
| WiFi |
Included in both recommended control units |
| Certification |
ETL Listed |
Room sizing and stones
| Room volume |
Up to 424 cu ft |
| Stones included |
No - sold separately |
| Stone specification |
See Stone Requirements document below |
| Control included |
No - sold separately |
Design and installation
| Profile |
Ultra-thin wall-mounted - architectural panel format |
| Finish |
Black |
| Mounting |
Wall-mounted |
| Origin |
Made in Finland by Harvia |
Compatible control units
| Xenio CX30-U1-U3-XW |
Built-in WiFi - MyHarvia app - iOS and Android |
| Fenix FX30-U1-U3-XC |
Built-in WiFi - 4.3" touchscreen - MyHarvia 2 - AI learning - smart timer |
| Both sold separately |
At BathingBrands - both include WiFi |
| Control panel placement |
Positioned independently of heater location |
The Wall series comparison
| SW60 (stainless, external) |
6kW | Up to 318 cu ft | External control required |
| SWS60 (stainless, built-in) |
6kW | Up to 318 cu ft | Built-in controls |
| SW80 (black, external - this) |
8kW | Up to 424 cu ft | External control required |
| SWS80 (stainless, built-in) |
8kW | Up to 424 cu ft | Built-in controls |
What's included
Harvia The Wall SW80 8kW wall-mounted heater - black finish
Installation and operation manual
Required (not included): External Xenio CX30-U1-U3-XW or Fenix FX30-U1-U3-XC control unit (both include WiFi, sold separately at BathingBrands); sauna stones (see Stone Requirements document for correct specification and quantity). A licensed electrician is required for all electrical connections. Do not connect to a GFI/GFCI breaker.
Why the Harvia The Wall SW80 stands out
Ultra-thin black panel - minimal and recessive
The SW80's black ultra-thin wall profile is the most visually recessive option in The Wall series - the dark finish against dark timber or tile walls makes the heater almost disappear into the sauna room's material palette. For contemporary dark-interior saunas where the goal is a heater that does not draw the eye, the SW80's black finish and flat profile achieve that integration more completely than any stainless or lighter finish alternative.
External control - flexible panel placement
Because the SW80 has no built-in controls, the separate Xenio or Fenix control panel is positioned independently at any location in or outside the sauna room - at the optimal point on the sauna wall for reach and visibility, in the changing room, or at the entrance. This placement flexibility is not available with the SWS80's fixed built-in controls, and is especially useful in sauna rooms where the heater is positioned in a corner or location where a fixed-face control panel would be awkward to reach.
WiFi included in both recommended controls
Both the Xenio CX30-U1-U3-XW and the Fenix FX30-U1-U3-XC include built-in WiFi - no add-on panel purchase is required for app connectivity when pairing the SW80 with either of these control units. Remote preheat, scheduling, and temperature monitoring via MyHarvia or MyHarvia 2 are available from the day of installation. The Fenix FX30 additionally offers a 4.3" touchscreen, AI learning, smart timer, and 3 presets.
8kW for rooms up to 424 cu ft
The SW80 covers rooms up to 424 cubic feet in the same ultra-thin wall format as the smaller SW60 (up to 318 cu ft). For mid-size sauna rooms where the 6kW SW60 is insufficient, the SW80 is the correct The Wall selection at the same slim wall profile and black finish. Both require an external control and stones to operate.
Fenix FX30 pairing - the premium SW80 control
The Fenix FX30-U1-U3-XC is the newer-generation control for the SW80: 4.3" glass touchscreen, MyHarvia 2, AI learning that adapts to the heater's performance, smart timer that calculates the optimal preheat start time, and 3 customizable presets. Paired with the SW80's ultra-thin black panel, the FX30's modern touchscreen delivers a premium sauna control experience that the SW80's flat profile fully supports.
SW80 Package also available
For buyers who want a bundled purchase including the SW80 heater, control, and stones, the Harvia The Wall SW80 Package listing at BathingBrands bundles all required components together. This standalone listing is for buyers who are sourcing the heater separately - for example, replacing just the heater in an existing The Wall installation, or purchasing components in separate transactions.
About Harvia
Made in Finland - ETL Listed
Harvia The Wall SW80. 8kW. Up to 424 cu ft. Black. External control required. Ultra-thin profile.
Harvia is a Finnish sauna and spa company with over 70 years of manufacturing history. The Wall SW80 is the 8kW black model in Harvia's architectural wall-panel heater series - ultra-thin wall-mounted format with no built-in controls, requiring a separate Xenio CX30-U1-U3-XW or Fenix FX30-U1-U3-XC control unit (both sold separately with WiFi included). Stones are also sold separately. For a complete bundled purchase, see the SW80 Package listing. We are an authorized Harvia dealer.
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8kW, up to 424 cu ft - 240V/1PH, ETL Listed
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Black finish - ultra-thin wall-mounted architectural format
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External control required - CX30-U1-U3-XW or FX30-U1-U3-XC (both include WiFi)
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Flexible control panel placement - independent of heater position
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Stones sold separately - see Stone Requirements document
SW80 vs SWS80 - black external vs stainless built-in
SW80 (black, external control) vs SWS80 (stainless, built-in) - the full comparison
The SW80 and SWS80 are both 8kW The Wall heaters for rooms up to 424 cu ft with the same ultra-thin wall profile. SW80 (this listing): black finish, no built-in controls, requires Xenio CX30-U1-U3-XW or Fenix FX30-U1-U3-XC (both include WiFi), control panel positioned independently. SWS80: stainless steel finish, built-in digital time and temperature controls, no separate control purchase required for basic operation, WiFi available via add-on CX004WIFI or FX001XW. For black finish or Xenio/Fenix WiFi system from day one: SW80. For stainless finish or self-contained built-in operation: SWS80. Both require stones separately. The SW80 Package and SWS80 Package listings at BathingBrands bundle control and stones with the respective heaters for a complete single purchase. A licensed electrician is required. Do not connect to a GFI/GFCI breaker.
Manuals and Documents
Warranty
Harvia limited warranty
The Harvia The Wall SW80 is covered by Harvia's limited warranty from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. The warranty does not cover damage caused by improper installation, use without the required stone load, incorrect stone specification, connection to a GFI/GFCI breaker, operating without a compatible external control unit, or failure to follow Harvia's installation and operating guidelines. A licensed electrician is required for all electrical connections. Proof of purchase from an authorized Harvia dealer is required for warranty claims. We are an authorized Harvia dealer.
