Every Detail
Specifications & Details
Specifications
Model: Narvi Kuru 20
Heater Type: Wood-burning sauna stove
Room Capacity: Up to 20 m³ (approximately 706 cu ft)
Stone Capacity: 88 lbs (40 kg) of sauna stones
Material: Aluminized carbon steel body with cast iron door
Country of Manufacture: Finland
Fuel Type: Wood-fired (birch, ash, or hardwood recommended)
Approximate Weight: 88 lbs (40 kg) without stones
Flue Diameter: 5″ (125 mm)
Certifications: CE certified; meets EU emissions standards
What's Included
- Narvi Kuru 20 wood-burning sauna heater
- Firebox grate
- Ash pan
- Installation and operation manual
- Manufacturer warranty card
Sauna stones sold separately — we recommend 65–88 lbs of igneous sauna stones.
Sauna Compatibility & Sizing
Minimum Room Size: 8 m³ (283 cu ft)
Maximum Room Size: 20 m³ (706 cu ft)
Ideal Sauna Types: Dundalk 8 ft barrel saunas, medium cabin saunas, traditional Finnish rooms up to 10×10 ft
Clearance to Combustibles: Minimum 18″ on sides and rear; 24″ above the firebox opening
Flue / Chimney: Requires a listed chimney system — consult a licensed installer
Electrical: None required — entirely wood-fired
Floor Protection: Non-combustible hearth pad required under and in front of the heater
Shipping & Warranty
Shipping Method: LTL freight — curbside delivery to your driveway
Estimated Transit: 5–10 business days after order is processed
Freight Note: A delivery appointment will be scheduled; someone must be present to receive the shipment
Country of Origin: Finland
Warranty: 2-year limited manufacturer warranty covering defects in materials and workmanship under normal residential use
Claims: Contact Sauna Co. at info@saunacompanyusa.com with your order number and photos of the issue
5-Year Warranty
Narvi Kuru 20 Wood-Burning Sauna Heater
Overview
The Narvi Kuru 20 is a freestanding wood-burning heater built to deliver powerful, long-lasting löyly in larger barrel and cabin saunas. Handcrafted in Finland from durable steel with a generous stone bed, it burns clean and efficiently while producing abundant steam.
- Wood-fired heat — no electrical hookup required
- Large stone capacity for soft, steady warmth and rich steam
- Made for big rooms — ideal for larger Dundalk barrel and cabin saunas
Do your research first
This is a big purchase. We'd rather you get a fair look at the market — compare with these trusted sources before you decide.
Watch & learn
Installation Guide
Follow along with this step-by-step installation and assembly walkthrough so you know exactly what to expect. Our team is one message away if you need a hand.
Do your research first
This is a big purchase. We’d rather you get a fair look at the market — compare with these trusted sources before you decide.
to a friend
The Narvi Kuru 20 brings the authentic wood-fired sauna experience and it's worth the extra effort. The cast and steel build is heavy duty, it holds a large stone load, and once the fire is going it pumps out a deep, soft heat you just don't get from electric. Reaches a proper hot sauna in about 40-45 minutes. The crackle of the fire is part of the ritual. Built to last decades.
Off-grid at our cabin so a wood heater was the only option, and the Kuru 20 is excellent. Big stone capacity means wonderful steam, and the wood heat is softer and deeper than electric. Took about 45 minutes to get hot. Solid Finnish construction. Love it.
The Kuru 20 itself is superb — heavy, holds lots of stones, deep wood heat. Just plan for the flue and clearances; a wood heater install is more involved than electric and you'll want it done right for safety. Once set up it heats well and the experience is unmatched. Recommended for anyone wanting true wood-fired sauna.
Paired the Kuru 20 with our cedar barrel and it's a perfect match. The wood fire heat is incredible and the stones throw beautiful steam. Heats up in about 40 minutes once the fire catches. Heavy, well-built heater that should outlast us.
Wood-burning is the way and the Narvi Kuru delivers. Robust build, generous stone load, and the heat is deeper than any electric I've used. Worth the chimney setup. Highly recommend.