Harvia's flagship wood-burning heater line
P.07Flagship
Legend 150 / 240 / 240SL
Specs from harvia.com and Harvia Plc materials, in US units. Check the current Harvia manual before you wire or install.
Cast-iron glass door, a heavy stone load, and a grate Harvia says burns cleaner. Sold in the US as the Almost Heaven Legend 150 kit.
The Legend is Harvia's flagship wood-burning line. Legend 150 (WK150LD) is the residential-to-small-commercial unit for rooms up to 460 cubic feet and ships through Almost Heaven as a complete kit (WK150LD + WL100 flue + WHP1500 water heater). The 240 and 240SL scale to larger commercial installs; the SL variant adds an external wood feed so the fire is tended from outside the sauna room.
Off-grid and wood-fired residential builds, destination commercial saunas, rural cabins with wood on-property, Almost Heaven Legend 150 kit buyers in the US. SL variant for every commercial wood-fired spec.
Editorial analysis for context, not a purchase recommendation.
Room sizes in cubic feet, stone loads in pounds.
From earnings calls, investor presentations, annual reports, and the Harvia catalog.
“Modern grate structure in the fire chamber results in cleaner and more efficient burning. Cast-iron glass door that lets warm firelight glow through.”
harvia.com Legend product page
Official product positioning
“They are made in America, in the heartlands of America in West Virginia.”
CEO Matias Järnefelt, Q4 2025 earnings call
Almost Heaven offers the Legend 150 Kit as a US-assembled wood-fired sauna package. The Legend is built in Finland and the full sauna kit ships from Renick, WV
“We have been continuing our systematic investments in increasing capacity to produce more products.”
CEO Matias Järnefelt, Q4 2025 earnings call
Muurame factory capacity; the Legend line is produced there alongside Harvia's other wood-burning heaters
Check each note against the current Harvia manual and your local code.
N.01
The 240SL adds an external wood-feed door so the fire is tended from outside the hot room. For commercial and public-sauna installations this is meaningful both for operator safety and for keeping ash and wood debris out of the bathing area. Residential builds that want cleaner ash management also benefit. Every commercial wood-fired Harvia spec should be evaluated against the SL variant before ordering the standard 240.
N.02
Legend ships with Harvia's native flue collar sized for European specification (4.5"). North American installations typically require a 6" minimum insulated Class A chimney run from collar through roof termination. Use Harvia's flue components and adapters, and budget the full chimney package separately from the heater itself. Skipping certified chimney components on a wood-fired heater is both a code violation and a real fire-safety risk.
N.03
Wood-fired heaters cycle stones harder than electric. Use the washed sauna stones Harvia specifies in the installation manual. Landscaping or decorative rocks from a big-box store often crack and pack down under the thermal cycling a wood-fired heater imposes, cutting steam output and eventually restricting airflow.
N.04
Harvia sells both the Legend series and the numbered wood-burning range (Harvia 20, 36, 50). They are distinct products aimed at slightly different commercial use cases. The Harvia 50 at White Mountain Sauna Haus is the top end of the numbered range. Legend 240 and 240SL compete in the large-commercial category too, with different stone-mass and firebox geometry. Talk to a Harvia commercial dealer about which fits the specific room and usage pattern; do not assume the model numbers are directly comparable.
Product, detail, and technical images from the Harvia Media Bank.
Images: Harvia Media Bank, courtesy of Harvia Plc, unless the caption says otherwise.
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Product data comes from Harvia Plc investor materials, earnings call transcripts, harvia.com, and harviagroup.com. Quotes carry their source where a public one exists. SaunaNews is not affiliated with Harvia Plc; this page is a product record for news coverage, not a sales page. Spot an error or an outdated spec? Tell the newsroom .
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