Harvia M Series Wood Stove Sauna Heater with Exterior Feed
An Important Note on Pricing and Returns:
We believe in upfront pricing and fair policies—no hidden fees, no surprises, and easy,
transparent returns. If you're comparing options, we encourage you to review competitors’
fine print carefully.
We've helped countless customers who had issues elsewhere, and we’re here to make sure
that never happens to you.
Ships in 1-5 days at most
Couldn't load pickup availability
Product Information
The Harvia M Series Wood Stove Sauna Heater with Exterior Feed lets you enjoy cozy fireplace ambiance in
one room while heating the sauna from another.
Featuring a cast-iron glass door, 16.5kW output, and space-efficient design, this unit is ideal for
small home saunas (212–459 cu. ft.) and offers efficient steam and a traditional sauna experience.
Product Features
Engineered for dual-room comfort, this Harvia heater is ideal for those who enjoy heating their sauna
from a separate space.
Its sturdy steel build, efficient steam output, and elegant glass door create a truly immersive
experience.
16.5kW heat output
Exterior-feed design
Heats sauna and fireplace room
Adjustable floor model
Cast-iron glass door
Harvia M Series Wood Stove Sauna Heater with Exterior Feed
Exterior Feed Functionality:
Heat the sauna from outside, maintaining cleanliness and adding cozy firelight ambiance to the adjoining
room.
Dual Room Heating:
Simultaneously warms the sauna and fireplace room for enhanced comfort and flexibility.
Quick Steam Production:
High-capacity stone compartment delivers fast, consistent heat for a satisfying sauna session.
Installation Flexibility:
Adjustable legs and upper smoke outlet simplify positioning for various floor levels.
Optional Water Heater:
Compatible with chimney-mounted water tank for added convenience in remote settings.
Classic Glass Door:
Cast-iron-framed door lets you enjoy the warm glow of the fire in your living or fireplace room.
Additional Features
This dual-room sauna stove provides fast heat-up time, external feeding, cozy firelight ambiance, and compatibility with chimney water tanks.
Optional Water Heater
Compatible with chimney-mounted tanks for additional water heating convenience.
Cast-Iron Glass Door
Enjoy fire visibility and extra warmth from the fireplace-side room.
Adjustable Floor Legs
Flexible installation allows leveling on uneven sauna floors.
Exterior Feed System
Load wood from the adjacent room, keeping your sauna clean and mess-free.
About Harvia
Harvia is a globally recognized Finnish brand known for its premium sauna heaters, control systems, and wellness solutions.
Founded in 1950, Harvia blends traditional sauna culture with modern technology, offering reliable, high-performance products.
Renowned for durability, efficiency, and elegant design, Harvia continues to lead the industry in crafting exceptional sauna experiences for homes and commercial spaces worldwide.
Why Choose Us?
Choose Peak Primal Wellness for a personalized, community-driven approach to health. We prioritize your well-being with high-quality products, tailored solutions, and 24/7 support.
As a family-owned business, we build lasting relationships, offering authentic, effective solutions to help you achieve your wellness goals.
Join our thriving community and embark on a journey toward optimal health with passionate professionals who genuinely care. At Peak Primal Wellness, you're not just a customer—you're family.
Why Thousands of Health and Fitness Lovers Choose
Them
Support
Nearly impossible to reach a real person. Endless chatbot loops, auto-replies, and unreturned emails.
Real humans. We answer quickly. Always here, always helpful
Order Processing
Orders often sit for days before being acknowledged. No clear confirmation, updates, or timelines.
Orders are processed immediately. You'll receive confirmation, tracking, and real-time updates within hours.
Shipping
Slow, vague, and unoptimized. Basic carriers, minimal tracking, and delayed delivery windows.
Fast, insured, and fully trackable shipping — optimized for speed and visibility every step of the way.
Pricing
Hidden fees, bait and switch tactics, post purchase price increases.
Our relationships guarantee the lowest prices. Transparent and fair. No surprises at checkout, and no shady
tactics after the sale.
Returns & Warranty
Policies are confusing and designed to frustrate, delay, and deny returns with zero accountability.
Clear, honest, and fast. Our return policy is built to protect your investment, not dodge responsibility.
Support
Frustrating automated responses
Fast, helpful and always supportive
Order Processing
Delays and lack of communication
Instant processing and updates
Shipping
Slow, unreliable and delayed service
Fast, insured, trackable shipping
Pricing
Deceptive pricing practices
Lowest prices, no surprises
Return & Warranty
Frustrating, misleading return policies
Clear, honest return policy
Specifications
| Brand | Harvia |
| SKU | WKM3SL |
| Model | M Series SL |
| Power Output | 16.5 kW |
| Primary Fuel | Wood |
| Firewood Length | 13.7" (350mm) |
| Stone Capacity | 66 lbs (2 boxes) |
| Material | Steel |
| Color | Black |
| Installation | Floor-mounted |
| Width | 15.3" (390mm) |
| Depth | 25" (640mm) |
| Height | 28" (715mm) |
| Weight | 99 lbs (without stones) |
| Room Volume | 212–459 cu. ft. |
| Minimum Room Height | 75.4" (1915mm) |
Warranty & Returns
Return Policy
To request a return or refund, customers can use our contact form, email (info@peakprimalwellness.com) , or phone - (877) 689-4898. Once the product is inspected and confirmed to be in brand new condition, we will initiate the refund, which typically takes 5-7 business days to post back to the original payment method. Refunds can be applied via the customer’s preferred method, including card or bank transfer. Shipping instructions and the return address will be provided upon contacting customer service. Please include photos if the product arrives damaged. Click here to view our complete return policy for more details.
Shipping Policy
Customers may contact us by phone or email anytime to inquire about the status of their order. While we may not always have a tracking link available before the order ships, we are happy to check its current status for you. If an item is never received, please contact us immediately. We will promptly file a claim on your behalf and ship a replacement to ensure you receive your product as soon as possible. Click here to view our complete Shipping policy for more details.
Frequently Asked Questions
What size sauna room is this model suited for?
This heater is ideal for sauna rooms between 212 and 459 cubic feet in size.
Can I load the wood from outside the sauna?
Yes, this exterior-feed model is designed for loading wood from an adjacent room, keeping your sauna clean and smoke-free.
Are sauna stones included?
No, sauna stones are sold separately. This unit requires 66 lbs of stones (two 44 lb boxes of 10–15 cm stones).
Is this heater compatible with a water tank?
Yes, it supports an optional chimney-mounted water tank, ideal for generating warm water in remote settings.
Can it be used in an outdoor sauna?
Yes, it is suitable for outdoor saunas as long as the space is well-insulated and properly vented.
How long does it take to heat the sauna?
Depending on sauna insulation and external temperatures, heat-up time typically ranges from 30 to 45 minutes.
What type of wood should I use?
Use dry, seasoned hardwood no longer than 13.7 inches to ensure efficient combustion and optimal heat output.
