What is Harvia Pro Wood?
Harvia Pro Wood is a floor-standing heater from Harvia with 24.1-31 kW output and 88-132 lbs stone capacity.
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Harvia Pro Wood
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Harvia Pro Wood sauna heater specs and 3D room planner
Use this catalog-backed Harvia Pro Wood product page to compare wood output, adjusted room volume, clearances, chimney path, stones, floor protection, and manual install checks before you open the sauna in the designer.
Harvia Pro Wood is a floor-standing heater from Harvia for 283-1271 cu ft adjusted sauna rooms. Key planning facts: 24.1-31 kW output, 88-132 lbs stone capacity, and 91" minimum finished ceiling guidance, plus T600 chimney path, 115 mm flue connection, hearth/floor protection, combustion air, and local fire-code review.
Design with Harvia Pro Wood Buy in North America at Sauna Marketplace
Quick answers
What sauna room size fits Harvia Pro Wood?
The published adjusted room-volume range is 283-1271 cu ft. Add glass, tile, stone, brick, concrete, or log exposure before choosing the final kW row.
What clearances does Harvia Pro Wood need?
Plan 11.8"-19.7" side/back clearance, 11.8"-19.7" front clearance, and a 91" minimum finished ceiling check before placing benches or glass.
What chimney does Harvia Pro Wood need?
Plan a T600 chimney path with 115 mm stove connection, the selected WHP chimney parts or AHJ-approved equivalent, lead-through protection, and local fire-code review.
Where should I start with Harvia Pro Wood?
Use the 3D designer to validate the room, benches, openings, combustible clearances, chimney lead-through, guard rail, hearth protection, and material schedule before purchase.
Harvia Pro Wood size and clearance table
| Variant | Power | Room volume | Dimensions | Rocks | Side/back | Front | Minimum ceiling | Chimney / install |
|---|---|---|---|---|---|---|---|---|
| Pro 20WKPR20M | 24.1 kW | 283-706 cu ft | 16.9" W x 20.1" D x 29.9" H | 88 lb | 11.8" | 11.8" | 91" | Manual wood stove; chimney and hearth package by installer |
| Pro 20 SLWKPR20SLM | 24.1 kW | 283-706 cu ft | 16.9" W x 28.4" D x 29.9" H | 88 lb | 11.8" | 11.8" | 91" | Manual wood stove; chimney and hearth package by installer |
| Pro 20 ESWKPR20ESM | 24.1 kW | 283-706 cu ft | 16.9" W x 25.6" D x 29.9" H | 88 lb | 11.8" | 11.8" | 91" | Manual wood stove; chimney and hearth package by installer |
| Pro 20 RSWKPR20RSM | 24.1 kW | 283-706 cu ft | 22.8" W x 20.1" D x 29.9" H | 88 lb | 11.8" | 11.8" | 91" | Manual wood stove; chimney and hearth package by installer |
| Pro 20 LSWKPR20LSM | 24.1 kW | 283-706 cu ft | 22.8" W x 20.1" D x 29.9" H | 88 lb | 11.8" | 11.8" | 91" | Manual wood stove; chimney and hearth package by installer |
| Pro 20 DuoWKPR20DUOS | 24.1 kW | 283-706 cu ft | 16.9" W x 31.1" D x 29.9" H | 88 lb | 11.8" | 11.8" | 91" | Manual wood stove; chimney and hearth package by installer |
| Pro 26WKPR26M | 26.6 kW | 353-918 cu ft | 16.9" W x 20.1" D x 31.9" H | 110 lb | 14.8" | 14.8" | 91" | Manual wood stove; chimney and hearth package by installer |
| Pro 36WKPR36M | 31 kW | 494-1271 cu ft | 20.1" W x 20.1" D x 31.9" H | 132 lb | 19.7" | 19.7" | 91" | Manual wood stove; chimney and hearth package by installer |
| Pro 36 DuoWKPR36DUOS | 31 kW | 494-1271 cu ft | 20.1" W x 31.1" D x 40.9" H | 132 lb | 19.7" | 19.7" | 91" | Manual wood stove; chimney and hearth package by installer |
Best fit
- 24.1-31 kW Harvia heater family for 283-1271 cu ft adjusted hot rooms.
- Floor-standing layouts where the heater footprint, front clearance, and bench approach are planned before ordering.
- 88-132 lbs stone capacity with chimney, hearth, heat-shield, and combustion-air planning handled before ordering.
- Rooms that can meet the 91" minimum finished ceiling check for the selected size row.
- Floor structure, non-combustible base, stove guard rail, chimney route, and roof lead-through should be resolved with the full room layout.
Designer checks
- Size the room by adjusted volume, including the 3.94 cu ft per sq ft (1.2 m3 per 1 m2) for glass, stone, tile, brick, concrete, or similar cold surfaces rule where it applies.
- Validate side/back clearance 11.8"-19.7", front clearance 11.8"-19.7", and bench setback before finalizing benches.
- Check the 91" minimum finished ceiling against the room height.
- Carry chimney kit/extensions/damper, lead-through, hearth protection, heat shields, ash handling, and local fire-code review into the material schedule.
Package notes
- Selected Harvia Pro wood stove body with glass fire door
- 88-132 lb; Harvia Pro Sauna Stones
- Installation and operation manual
- Harvia Pro Sauna Stones
- Harvia Stainless Steel Chimney Kit for Flat Roof
Manual-backed facts
Source
SaunaDesignPro heater catalog
Confirm the source file before ordering.
Mounting
Floor-standing
Floor-standing sizes use their own body height and top clearance.
Model numbers
WKPR20M / WKPR20SLM / WKPR20ESM / WKPR20RSM / +5 more
Useful when the store name and manual model number are not identical.
Room volume range
283-1271 cu ft
Use adjusted sauna volume after cold surfaces, not just geometric room volume.
Body weight
116.9-187.4 lb
Listed body weight before stones; verify shipping weight with the final SKU.
Cold-surface adder
3.94 cu ft per sq ft (1.2 m3 per 1 m2) for glass, stone, tile, brick, concrete, or similar cold surfaces
The calculator applies the brand-family coefficient before selecting a heater size.
Minimum finished ceiling
91"
Computed from body height, floor clearance, top clearance, and the manual minimum room height.
Maximum room height
Not listed for these sizes
Verify with the selected manual when designing unusually tall rooms.
Electrical/control
Wood-burning; no electric heater circuit; Manual wood stove; chimney and hearth package by installer
Use the selected kW row and SKU when matching breakers, phases, relays, and controller packages.
Critical differences
Harvia Pro high-output wood stove for large and commercial rooms; T600 chimney, 115 mm connection / 110 mm min flue inner diameter, top or rear exit For a US 6" Class-A chimney, SaunaMarketplace stocks the WZ115155 4.5"->6" adapter; the assembled hybrid stack is an installer/AHJ-specified system - Harvia's own WHP chimney documentation covers vertical roof-pass installs only
10 more notes shown below.
Fuel / standard
Wood
Flue class / diameter
T600; 115 mm connection; 110 mm min pipe ID
Connection locations: Verify.
WHP chimney clearance
100 mm insulated chimney to combustibles; 500 mm single-wall pipe to walls (stainless; 375 mm with the black WHP1500M connector)
The insulated chimney runs 220 mm outside diameter over the 115 mm smoke pipe. Keep at least 430 mm of insulated chimney visible in the room. Lead-through insulation must be class A or long-term rated at 750 C or more (Harvia ZSH-200 in the kit).
WHP chimney scope
Vertical roof-pass installs only; standalone outdoor sauna buildings per Harvia support (2026)
For an indoor or residential build, the installer specifies a listed North American chimney path (e.g. UL 103 HT Class A via a 115 mm to 6" adapter) with AHJ sign-off instead of the WHP kit. Harvia 115 mm smoke pipes and WHP chimneys fit all Harvia wood-heated sauna stoves except the Harvia 50, plus the Harvia 10 iron stove.
WHP chimney limits
5 m max chimney elements; 2 m max freestanding element; 3 m max indoor lateral-support spacing
- Harvia Pro high-output wood stove for large and commercial rooms; T600 chimney, 115 mm connection / 110 mm min flue inner diameter, top or rear exit
- For a US 6" Class-A chimney, SaunaMarketplace stocks the WZ115155 4.5"->6" adapter; the assembled hybrid stack is an installer/AHJ-specified system - Harvia's own WHP chimney documentation covers vertical roof-pass installs only
- Harvia support (2026) specifies the WHP steel chimney for standalone outdoor sauna buildings; indoor or residential builds need an installer-specified listed chimney path (e.g. UL 103 HT Class A)
- Clearances shown are to combustible material without a shield; a Harvia WL protective sheath reduces side/rear substantially (see product page)
- Load 10-15 cm stones loosely with airflow open; the manual safety distances assume the stones are installed correctly and no wiring or combustibles enter the clearance envelope
- Harvia WHP insulated chimney is T600/G100: keep 100 mm from its outer casing to combustibles; the uninsulated smoke pipe needs 500 mm (stainless) or 375 mm (black WHP1500M connector) unless an approved Harvia radiation cover or protective system is specified
- Use a manufacturer-approved non-combustible hearth/protective bedding over wood or tiled waterproofed floors; roof-ceiling lead-through, combustion air, support spacing, termination, and local fire-code review are required
- Manual 4618 Fig 7: ceiling 1300, side/back/front 300 mm. WL500/WL550 sheath cuts side/back to 62 mm.
- SL feeds through the wall: opening min 405 W x 485 H from floor, wall max 120 mm thick, feed protrudes max 150 mm (manual 4922 Fig 11). Shares Pro 20 clearances.
- ES = a fixed 20 L water tank on the FRONT of the stove (tap on the side), not an external/through-wall feed; the stove is loaded from inside the sauna and shares the Pro 20 body clearances.
- Leave the front clearance clear for filling and drawing water; the tank adds 140 mm to the Pro 20 body depth.
- RS = right-side feed with a 30 L water tank; shares the Pro 20 body clearances. WL500/WL590 sheath. Mirror model Pro 20 LS (WKPR20LSM).