Product Description
The Harvia M3 is a compact wood-burning sauna heater package built around a steel stove sized for home saunas. Load the firebox, light the wood, and the M3 brings wood-fired heat to a small or mid-size sauna room.
The M3 suits sauna rooms of 6 to 13 cubic meters (212 to 459 cubic feet). This package pairs the stove with a chimney kit, floor bedding, a three-sided sheath panel, and 88 pounds of split-face stones. Choose a black powder-coated or stainless steel chimney to match your sauna.
Per Harvia, the M3 delivers 16.5 kW of output and holds up to 30 kg (66 lb) of stones. The stove connects at the top or rear through a 115 mm flue. This is a wood-burning appliance: install it with the required clearances to combustible materials, a non-combustible floor base, and a compliant chimney, and have a qualified installer confirm the setup against local building codes.
We confirm your exact shipping timeline within 1-2 business days of your order - or email us before you buy for the current lead time on this product. Your order ships with free standard shipping to the lower 48. The M3 carries a 2-year limited warranty from Harvia for family use. Questions before you order? Email support@thetherapeuticpatio.com or call (225) 535-3580.
Ideal for: compact home saunas that want an entry-price wood-fired Harvia heater with a chimney kit.
Harvia: Finnish sauna heat since 1950.
Features
-
16.5 kW output: heats a sauna room of 6 to 13 cubic meters (212 to 459 cubic feet).
-
Compact steel stove: the WKM3 in a black steel frame, about 99 lb.
-
Complete package: stove, chimney kit, floor bedding, three-sided sheath panel, and 88 lb of split-face stones.
-
Chimney finish choice: black powder-coated or stainless steel chimney kit and extension.
-
115 mm flue: connects at the top or rear of the stove.
-
Split-face stones included: AC3020 10-15 cm stones, two boxes (88 lb).
-
Holds up to 30 kg of stones: a 66 lb stone capacity for steady heat.
-
Water heater ready: accepts a WP220ST pipe-model water heater, sold separately.
-
Tested wood-burning stove: covered by a Declaration of Performance.
-
Warranty from Harvia: 2-year limited warranty for family use.
Specifications
Construction and Installation
- Stove: Harvia M3 (WKM3), black steel frame
- Main material: steel
- Flue connection: top or rear, 115 mm diameter (minimum flue inner diameter 110 mm)
- Sheath: WL450 three-sided sheath panel included
- Installation: wood-burning appliance; requires clearances to combustible materials per the manual, a non-combustible floor base, and a compliant chimney; use a qualified installer per local building codes
- Certification: Declaration of Performance (EN)
Fuel and Output
- Fuel: wood (solid wood logs)
- Output: 16.5 kW
- Sauna room size: 6 to 13 cubic meters (212 to 459 cubic feet)
- Not an electrical appliance; no wiring required
Controls
- Manual wood firing; no electrical controls
Dimensions and Capacity
- Stove: 710 mm high x 390 mm wide x 430 mm deep (27.95 x 15.35 x 16.93 in)
- Stove net weight: 45 kg (99.2 lb); package weight approximately 289 lb (131 kg), summed from Harvia IDM 6.22.2026 component weights
- Stone capacity: up to 30 kg (66 lb); stone size 10-15 cm; two boxes (88 lb) supplied
What's Included vs. Sold Separately
- Included in the package: M3 stove (WKM3) with stove door and ash box; chimney kit (WHP1500M black or WHP1500 stainless); chimney extension (WHP1000M or WHP1000); WL100 floor bedding; WL450 three-sided sheath panel; 88 lb (two boxes) of AC3020 split-face stones.
- Options on this page: Chimney Finish (Black / Stainless).
- Held pending verification: Floor Kit (Small 51 x 24 / Medium 63 x 24 / Large 78 x 24) with ceiling frame.
- Sold separately, say if you want it: WP220ST pipe-model water heater, WZ115115 pipe adapter, WHP270SP damper plate, light kit, bucket and ladle.
Product Manuals
