Description
The Pro series is built for hard, repeated use — a big stone compartment and a firebox sized for real löyly rather than a token puff. This is what goes into a family sauna that gets used every week and into light commercial rooms.
Duo — two rooms, one fire. Sauna stove on one side, open fireplace on the other, so the room you cool down in is warm too. It replaces a second appliance and a second flue.
Sizing: 24.1 kW, rated by Harvia for sauna rooms of 283–706 cu ft. Measure the room, not the bench.
Stones: choose above. Harvia’s minimum for this stove is 2 boxes of the 4–6 in fraction. Pick Included and they travel on the same pallet as the stove; pick Not included if you already have stone or would rather source it locally.
The minimum is a minimum, not a suggestion — an under-filled stove runs hot and loud and gives thin steam. If you are stacking it yourself, order one spare box of AC3020: natural stone varies in shape, and the spare is what lets you sort for a loose, well-packed pile.
Chimney: a wood-burning stove needs a UL-listed class-A chimney sized to its flue collar, installed to local code. We do not supply Harvia flue parts — plan that with your installer before the stove arrives.
Specifications
- Power: 24.1 kW
- Fuel: wood
- Dimensions: 17″W × 20″D × 30″H
- Minimum ceiling height: 82″
Frequently asked questions
Does the Harvia Pro 20 Duo need electricity?
No — it is a wood-burning stove. It needs a chimney connection, but no wiring and no electric control.
Do I need to buy anything else?
Yes — 2 boxes of sauna stones (add them in the option above, or source them locally) and a compatible chimney/flue.
What each option includes
- Add 2 boxes (4–6 in) — +$138 — 2 boxes of Harvia AC3020 olivine diabase, 4–6 in, 44 lb each — the charge Harvia specifies for this stove, shipped on the same pallet.
- Not included — Stove only. This stove needs stones to run — see the note in the description.
