M3 wood-burning sauna stove
| Power | 16.5 kW |
| Fuel | wood |
| Rated room volume | 6 to 13 m³ |
| Stone capacity | 29.9 kg |
| Controls | — |
| Voltage | — |
| Phase | — |
| Stated amperage | — |
A dash means the publisher does not state that figure. Nothing on this page is estimated.
Specs read from Sun Valley Saunas Harvia M3 page, states 211-460 cubic feet. Page stated ft3, converted to m3 on 2026-08-30. Retailer published.
$969checked 2026-08-30
Sun Valley sale price for the stove without stones. Stones +$100, stones plus chimney kit +$1,487.
Where these numbers came from
Every figure above was read from one page, listed here so you can check our reading rather than take it.
- Sun Valley Saunas Harvia M3 page, states 211-460 cubic feet. Page stated ft3, converted to m3 (retailer published, read 2026-08-30)
Who it suits, and who should skip it
Suits
- • Six person cabins, big glass and shed conversions: the room classes where mid-size stoves top out.
- • Sites without a practical 240 volt run, and buyers who want the ritual of a fire with their heat.
Should skip it
- • A small room. Oversizing wastes panel capacity and reaches temperature before the stones do their work.
- • Anyone unwilling to deal with a flue, local solid-fuel rules and a woodpile. The electric column exists for a reason.
How it sits in the field
Its own published numbers say where it sits among the heaters we track. At 16.5 kW it sits above the 8 kW median of the heaters we track. Its published range spans 7.0 cubic meters, a wider window than the median, which gives a room more margin to land mid-range. The stated stone load of 29.9 kg sits below the 55 kg median of the models that publish one. Each comparison counts only the records that state the figure involved, and the arithmetic reruns on every build.
What the publisher states, and what it does not
Of the 9 facts we try to verify on every heater, the linked pages state 5 for this one.
Not published: the control type, the voltage, the phase, a stated amperage.
Typical documentation for a sauna heater. The stated fields carry the comparison and the gaps stay visible above.
Common mistakes with this class
Buying at the edge of the rated range
Heater makers publish a volume window and their own guidance says to land in the middle of it. A room at the top of this range heats slowly and runs the elements harder than a size up would.
Measuring the room and stopping there
The makers size stoves against effective volume, which counts glazing and uninsulated surface on top of the tape measure. A big window can quietly move the answer a class up.
Forgetting the flue in the budget
The stove price is not the installed price. Chimney sections, roof flashing and clearances are their own line, and local rules on solid fuel stoves vary too much to assume anything.
Closest alternative on power
HIVE 15 kW is the nearest tracked heater by power rating, though it burns nothing: it is electric where this one is wood fired.
| This model | HIVE 15 kW | |
|---|---|---|
| Power | 16.5 kW | 15 kW |
| Fuel | wood | electric |
| Rated room | 6–13 m³ | 15–23 m³ |
| Voltage | — | 240 V |
| Price | $969 | — |
Keep reading
- Run your room through the math
Your room’s effective volume against this heater’s published window, computed the way its maker says to.
- Every wood stove we track
The wood-fired column, with stone mass, rated rooms and the code-variance caveat stated plainly.
- The rooms these stoves serve
The full sauna table, where each record carries its maker’s own stated heater range.
- The sizing math, walked through
The four person barrel scenario, sized end to end with the arithmetic shown.