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Harvia PRO 20 SL Pro Series Wood-Burning Sauna Stove with Exterior Feed
Harvia PRO 20 SL Pro Series Wood-Burning Sauna Stove with Exterior Feed
Harvia

Harvia PRO 20 SL Pro Series Wood-Burning Sauna Stove with Exterior Feed

Sale price$1,781.00
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Harvia PRO 20 SL Pro Series Wood-Burning Sauna Stove with Exterior Feed
Harvia PRO 20 SL Pro Series Wood-Burning Sauna Stove with Exterior Feed Sale price$1,781.00
Specifications
Attribute Details
Model 20 PRO SL
Heater Type Wood-Burning Stove with Exterior Feed
Output Rating 24.1 kW
Room Size 283–706 cu. ft.
Firewood Length Up to 13.7" (350 mm)
Firewood Diameter 3–6" (80–150 mm)
Installation Through-the-wall, floor-mounted
Stone Capacity Minimum 88 lbs (2 boxes AC3020)
Minimum Room Height 81.1" (2060 mm)
Weight 154 lbs
Dimensions 17"W × 28.7"D × 30"H (430 × 730 × 760 mm)
Warranty 2-Year Limited
Safety Note See installation manual for clearance requirements
Description

The Harvia PRO 20 SL brings traditional wood-burning performance together with modern convenience. Designed for through-the-wall installation, this stove allows you to load firewood from an adjacent room—keeping your sauna clean, quiet, and uninterrupted.

Perfect for small to medium-sized saunas ranging from 283 to 706 cubic feet, the PRO 20 SL delivers powerful heat, generous steam production, and a timeless Finnish sauna experience. The cast-iron framed glass door on the exterior side functions like a fireplace, creating a warm, inviting ambience in the adjoining room while the sauna heats efficiently on the other side.

Built with Harvia’s industry-leading craftsmanship, the stove features a robust steel body, efficient burn chamber, optimized airflow, and versatile connection options including upper and rear flue connections. Its minimum 88 lb stone capacity ensures deep, rich steam and excellent heat retention.

Features

  • Exterior-feed design allows you to load firewood from another room

  • Heats two rooms at once: sauna heater + adjacent-room fireplace

  • Powerful 24.1kW output suitable for 283–706 cu. ft. sauna rooms

  • Large stone capacity (minimum 88 lbs) for soft, continuous steam

  • Cast-iron framed glass door enhances ambience and durability

  • Upper and rear flue connection options

  • Integrated soot opening for easier maintenance

  • Designed, engineered, and crafted in Finland

  • Built for daily residential or cottage sauna use

  • Durable steel construction with long service life

What’s Included

  • Harvia PRO 20 SL Wood-Burning Stove

  • Exterior-feed stove door

  • Ash box

  • Installation and Operation Manual

  • 2-Year Limited Warranty

Required for Operation

Sauna Stones (Minimum 88 lbs Required)

  • Harvia AC3020 Split-Face Olivine Stones (10–15 cm)

    • 2 boxes required

    • Additional box recommended for selecting ideal stone shapes for airflow and performance

Documentation

Manual Links:

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Specifications
Attribute Details
Model 20 PRO SL
Heater Type Wood-Burning Stove with Exterior Feed
Output Rating 24.1 kW
Room Size 283–706 cu. ft.
Firewood Length Up to 13.7" (350 mm)
Firewood Diameter 3–6" (80–150 mm)
Installation Through-the-wall, floor-mounted
Stone Capacity Minimum 88 lbs (2 boxes AC3020)
Minimum Room Height 81.1" (2060 mm)
Weight 154 lbs
Dimensions 17"W × 28.7"D × 30"H (430 × 730 × 760 mm)
Warranty 2-Year Limited
Safety Note See installation manual for clearance requirements
Description

The Harvia PRO 20 SL brings traditional wood-burning performance together with modern convenience. Designed for through-the-wall installation, this stove allows you to load firewood from an adjacent room—keeping your sauna clean, quiet, and uninterrupted.

Perfect for small to medium-sized saunas ranging from 283 to 706 cubic feet, the PRO 20 SL delivers powerful heat, generous steam production, and a timeless Finnish sauna experience. The cast-iron framed glass door on the exterior side functions like a fireplace, creating a warm, inviting ambience in the adjoining room while the sauna heats efficiently on the other side.

Built with Harvia’s industry-leading craftsmanship, the stove features a robust steel body, efficient burn chamber, optimized airflow, and versatile connection options including upper and rear flue connections. Its minimum 88 lb stone capacity ensures deep, rich steam and excellent heat retention.

Features

  • Exterior-feed design allows you to load firewood from another room

  • Heats two rooms at once: sauna heater + adjacent-room fireplace

  • Powerful 24.1kW output suitable for 283–706 cu. ft. sauna rooms

  • Large stone capacity (minimum 88 lbs) for soft, continuous steam

  • Cast-iron framed glass door enhances ambience and durability

  • Upper and rear flue connection options

  • Integrated soot opening for easier maintenance

  • Designed, engineered, and crafted in Finland

  • Built for daily residential or cottage sauna use

  • Durable steel construction with long service life

What’s Included

  • Harvia PRO 20 SL Wood-Burning Stove

  • Exterior-feed stove door

  • Ash box

  • Installation and Operation Manual

  • 2-Year Limited Warranty

Required for Operation

Sauna Stones (Minimum 88 lbs Required)

  • Harvia AC3020 Split-Face Olivine Stones (10–15 cm)

    • 2 boxes required

    • Additional box recommended for selecting ideal stone shapes for airflow and performance

Documentation

Manual Links: