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Harvia

Harvia M3 Full Installation Bundle: Heater, Chimney, Stones, Base & Sheath

4.5 805 online product reviews
$3,45000 $5,00000
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Experience

The Harvia M3 Full Installation Bundle isn’t just a heater—it’s the full experience, delivered in one click. Fire. Stone. Steel. Safety. Everything you need to build a sauna sanctuary that hums with heat and holds nothing back.

We did the math for you. Save $163 when you bundle, and get every piece of the ritual in one click.

At the center: the iconic Harvia M3 wood-burning heater, framed in black and glowing through a glass firebox door. Below it: protective bedding that guards your floor with industrial beauty. Behind it: a sleek chimney system engineered in Finland for performance, expansion, and flair.

This is heat without hesitation. A bundle for purists who want to skip the scroll and get straight to the steam.

Bundle includes:

  1. M3 Heater – 16.5 kW, for 211–459 cu. ft. rooms
  2. Protective Sheath – 3-sided barrier to reduce wall clearance 
  3. Protective Bedding – Floor shield, 17.7″ W × 26″ D (450 mm × 665 mm), adjustable height
  4. 1500 mm Chimney Kit – Stainless steel, includes utility box, flanges, insulation, and rain cap
  5. 1000 mm Chimney Extension – Stainless steel, 39.3″ H (1000 mm), for added height
  6. Two boxes of stones – Olivine diabase, 88 lbs total
  7. Manuals for all components
Highlights

Everything you need—nothing you don’t

From the heater to the chimney, base, and stones, this bundle delivers the full ritual. No guesswork, no scrambling for parts. Just add fire (and maybe a plunge pool).

Save $163 by bundling

Individually, it adds up. Together? You pocket $163 and get every critical component in one click.

Engineered in Finland, built to endure

CE-marked, soot-fire resistant, and freeze-thaw tested. If it can survive a Nordic winter, it can handle your backyard.

Heat that holds its own

The Harvia M3 wood-burning heater packs 16.5 kW of power and an 88 lb stone bed—so you get steady, saturating steam every time.

Safety that disappears into design

A protective sheath and heat-shielded base reduce clearance requirements without ruining the view. Black. Sleek. Solid.

Vertical, smart, and scalable

The chimney system installs vertically, extends easily, and includes everything down to the rain cap and insulation kit.

 

Setup

Home Ready: No – Professional installation recommended for chimney, fire shielding, and clearance

Electrician required: No – Fueled by wood; no power source needed

Assembly: Ships with full installation manuals; chimney system designed for vertical installation only

Pro tip: Always follow local building codes for wood-burning appliances and install over a heatproof surface
Specifications

M3 Heater: wood-burning power with cast iron grate, adjustable legs, and tempered-glass door.

Power: 16.5 kilowatts of wood-burning heat
Material: Stainless steel body with black finish
Firebox: Cast iron grate with tempered-glass door
Installation: Freestanding floor placement with adjustable legs
Ash Management: Built-in ash box for easy cleanup
Capacity: Ideal for sauna rooms from 212 to 459 cu. ft. (6–13 m³)
Dimensions: 15″ W × 18″ D × 28″ H (38 × 46 × 71 cm)
Warranty: 2-year manufacturer warranty

Protective Sheath: 

Design: 3-sided safety barrier
Color: Matte black finish
Function: Reduces required clearance from combustible surfaces
Compatibility: Designed for use with wood-burning sauna heaters
Warranty: 2-year manufacturer warranty

Protective Bedding

Material: Aluminum-zinc coated steel
Color: Black
Design: Adjustable feet accommodate sloped floors
Function: Protects floors from heat damage under wood-burning sauna heaters
Dimensions: 17.7″ W × 26″ D × 2.4″–3″ H (450 × 665 × 60–75 mm)
Installation: Compatible with flat or angled surfaces
Warranty: 2-year manufacturer warranty

Chimney Kit (1500 mm)

Material: Stainless steel with mineral wool insulation
Installation: Mounts vertically; easy to extend if needed
Compatibility: Designed for wood-burning heaters, small fireplaces, and iron stoves
Certifications: CE-marked and sauna-approved (no touch protection needed)
Durability: Freeze-thaw resistant and soot-fire resistant
Includes: Utility box with opening templates and full mounting hardware
Origin: Designed, engineered, and made in Finland
Warranty: 2-year manufacturer warranty

Chimney Extension (1000 mm) 

Material: Stainless steel
Design: Innovative construction reduces movement from heat expansion
Use: Extends chimney height for additional clearance; indoor and outdoor compatible
Dimensions: 8.6″ diameter × 39.3″ height (220 mm × 1000 mm)
Durability: Freeze-thaw resistant and sauna-approved
Origin: Designed, engineered, and made in Finland
Warranty: 2-year manufacturer warranty

Sauna Stones 

Type: Split-face olivine diabase stones
Weight: 88 lbs (40 kg) total
Size Range: 4″ to 6″ (10–15 cm)
Performance: High heat capacity with excellent steam generation
Durability: Long-lasting, crack-resistant under extreme temperatures

Note: Each stone is naturally unique in size and shape—we recommend two boxes to select the best fit and stack for optimal heat flow

Model M3-PKG-SS
Includes M3 Heater 
Protective Sheath
Protective Bedding
1500MM Chimney Kit
1000MM Chimney Extension
2 boxes of Stones
Model M3
Kilowatt Rating 16.5 kW
Primary Fuel Wood
Minimum Cubic Feet 211 CF
Maximum Cubic Feet 459 CF
Heater Weight 97 lbs
Shipping Weight with Sauna Stones 163 lbs
Width 15"
Depth 18"
Height 28"
Model WHP1500
Material Stainless Steel
Non-vertical installations Not Allowed
Product Height 59"
Product Diameter 8-5/8"
Net Weight 49.38 lbs
Model WHP1000
Material Stainless Steel
Flexural Strength- tensile strength 16.4 ft (5m)
Non-vertical installations Not Allowed
Wind Load 6.5 ft (2m) above last support
Maximum spacing of lateral supports 9.8 ft (3m)
Weight 14.8 lbs
Diameter 8.6" (220mm)
Height 39.3" (1000mm)
Model WL450
Weight 14 lbs
Width 17.91"
Depth 18.89"
Height 31.49"

4.5

805 online ratings
The summary star rating & review is based on aggregated reviews of this product across the web. It cannot be altered by the merchant and can be verified by emailing support@onereview.app.

Harvia M3 Full Installation Bundle: Heater, Chimney, Stones, Base & Sheath Review Summary

4.5

805 online ratings
The summary star rating & review is based on aggregated reviews of this product across the web. It cannot be altered by the merchant and can be verified by emailing support@onereview.app.

What people like

This wood-burning heating system is highly valued for its efficiency and traditional aesthetic in smaller sauna spaces. It is frequently lauded for its rapid heat-up times and the atmospheric glow provided by the integrated glass door, which helps create a relaxing environment. Reviewers appreciate the inclusion of essential safety components like the protective bedding and sheath, which simplify the installation process and significantly reduce required safety clearances. Although it is a reliable and powerful unit, users note that regular maintenance of the glass and the need for smaller-sized wood fuel are necessary considerations for the best experience.

Pros

  • Rapid Heating Cycles: Many reviewers highlight how quickly the unit warms the sauna to the desired temperature, even in colder climates.
  • Atmospheric Glass Door: The inclusion of a glass window allows users to enjoy the visual of the fire, adding to the authentic and relaxing sauna experience.
  • Comprehensive Installation Kit: The bundled protective sheath, bedding, and chimney kit are praised for providing a complete, high-quality safety solution in one package.
  • Durable Steel Construction: Users frequently mention the sturdy build quality and the longevity of the stainless steel components and the venting system.

Cons

  • Frequent Glass Cleaning: The viewing window tends to accumulate soot quickly, requiring regular maintenance to keep the fire visible and the unit looking clean.
  • Small Wood Requirements: Because the firebox is compact, users must spend extra time cutting and splitting wood into smaller pieces to fit properly inside.
  • High Surface Heat: Some reviewers find that the door handle can become quite hot during extended use, necessitating the use of a heat-resistant glove for safety.
  • Strict Safety Clearances: Even with protective shielding, the unit requires careful planning and specific distances from combustible materials to meet fire safety standards.
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