Harvia Wall Sauna Heater 8kw Stainless Steel with Built-In Controls (2

Harvia Wall Sauna Heater 8kw Stainless Steel with Built-In Controls (250-425CF)

$1,668.00 $1,851.48

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Harvia HSWS8U1B Electric Sauna Heater

The Harvia HSWS8U1B Electric Sauna Heater is Harvia's wall-mounted flat-face sauna heater with an integrated dial and 1-hour programmable timer. The 8 kW Wall is designed for large residential / family-size sauna cabins (4+ person) from 250 to 425 cubic feet of interior volume, delivering efficient heating from a compact wall footprint. Available in Stainless Steel (HSWS8U1B) or Black Steel (HSW8U1B).

Key Features

Capable of heating sauna rooms from 250 to 425 cubic feet, ideal for large residential / family-size sauna cabins (4+ person).
Compact unit dimensions of 9"D x 17"W x 23"H for installations where wall depth is at a premium.
Powerful 8 Kilowatts and 33 Amps performance ensures quick and even heating of your sauna space.
Requires 8 Gauge Copper for installation.
Wall mounted with built-in dial control and 1-hour programmable timer + 8-hour pre-set delay.
Requires one 20 kg (44 lb) box of sauna stones, AC3000 olivine diabase, 5–10 cm grade, for optimal heat retention. Bundled into the "With Stones" package.
UL Listed, assuring compliance with U.S. residential safety and quality standards.

Technical Specifications

Specification	Detail
Room Volume	250 to 425 cubic feet
Dimensions	9"D x 17"W x 23"H
Power	8 kW, 33 Amps
Voltage	240V 1-Phase, 60 Hz
Wire Size	8 Gauge Copper
Mounting	Wall Mounted with Built-In Controls
Timer	1-hour programmable + 8-hour pre-set delay
Sauna Rocks	1 × 20 kg / 44 lb box AC3000 (included with "With Stones" package)
Certification	UL Listed
Harvia Model Codes	HSWS8U1B, Stainless Steel HSW8U1B, Black Steel

Why the 8 kW Size

The Wall 8 kW is rated for sauna cabins between 250 and 425 cubic feet, best for large residential / family-size sauna cabins (4+ person). Calculate your cabin volume as interior length × width × height. If the cabin includes a glass door or window, add roughly 25% to the calculated cubic footage to compensate for radiant heat loss. For smaller residential saunas (under 250 cu ft), see the Wall 6 kW sibling product.

What's Included

Each kW size is offered in two package configurations. Pick the size first from the selector above, then pick the package from the dropdown on the product page.

Package	Includes
Wall Just Heater	Harvia The Wall heater body in the selected kW size (240V 1-Phase) Built-in dial control with 1-hour programmable timer + 8-hour pre-set delay
Wall With Stones	Harvia The Wall heater body in the selected kW size (240V 1-Phase) Built-in dial control with 1-hour programmable timer + 8-hour pre-set delay 1 × Harvia AC3000 Sauna Stones, olivine diabase, 5–10 cm, 20 kg (44 lb) box, sized for the Wall stone column

Sauna Stones

Every "Wall With Stones" package ships with one box of Harvia AC3000 standard sauna stones, olivine diabase, 5–10 cm size grade, 20 kg (44 lb) per box. AC3000 is the correct stone size for The Wall's stone column. The smaller 5–10 cm size grade packs more densely than the larger 10–15 cm AC3020 grade, giving you more thermal mass and more even löyly when water hits the stones. If you prefer to source stones locally, pick the "Just Heater" package; stones are sold separately.

Installation & Electrical Requirements

The Wall 8 kW requires a dedicated 240V 1-Phase circuit (33 Amps, 8 Gauge Copper) wired by a licensed electrician. The Wall is UL Listed and must be installed per the included manual and local electrical code. Consult the PDF manual below before framing-in.

Installation Manual

Click Here to Download the Harvia The Wall Installation Manual

In the Box

1 × Harvia HSWS8U1B Electric Sauna Heater body
Installation and Operation Manual
Warranty Information

About the Harvia The Wall Family

Harvia The Wall is the company's flat-faced, wall-mounted electric sauna heater, engineered for compact installations where wall depth matters and the customer wants the controls integrated directly into the heater body (no external power unit). Available in two kilowatt sizes (6 kW, 8 kW) and two finishes (Stainless Steel or Black Steel), every Wall heater includes an integrated 1-hour programmable timer with 8-hour pre-set delay, the simplest, most reliable control setup for a residential Finnish sauna build.

Want digital scheduling, WiFi/MyHarvia app control, or remote start? See the Harvia Spirit family page, it pairs with the external Xenio CX30 or next-generation Fenix FX30 control. The Wall shown here is the no-frills mechanical version.

Why Buy From Finnish Sauna Builders

As an authorized Harvia dealer, Finnish Sauna Builders sources every heater direct from Harvia US (Lewisburg, WV) with full factory warranty and dealer technical support. Our team works with you from heater sizing through installation. Free shipping on all Harvia heaters; white-glove install coordination available nationwide.

Warranty & Support

Harvia The Wall carries Harvia's standard 2-year residential limited warranty. Finnish Sauna Builders handles all warranty claims direct, no third-party return desk.

About Harvia

Harvia has been building world-class sauna heaters in Finland since 1950. Every Harvia product carries forward more than 70 years of Finnish craftsmanship, materials science, and a relentless focus on the perfect löyly, the heated, humid burst of steam released when water meets hot sauna stones.