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A wood stove is set by room volume, the chimney route and the floor. Check each point with your installer and local fire authority.
Have these ready before ordering
✓ Authorized Harvia Dealer since 2023
This complete Harvia kit bundles the main sauna stove with its chimney system, protective floor and wall components, and Harvia sauna stones. Everything needed for a full installation ships in a single order.
Why Buy From RecovAthlete
We're an authorized Harvia dealer, not a marketplace reseller. Your warranty is valid and your order is fulfilled correctly. We confirm your chimney kit for your specific ceiling height before your order ships, so you don't receive the wrong flue components on installation day.
Questions about sizing, clearances, or installation? Call 866-861-6317 and you'll reach someone who has configured dozens of these setups.
“Buying a complete kit eliminates one of the most common installation mistakes: ordering chimney components that don't match the stove. Everything in a Harvia kit is sourced to be compatible.”
Harvia sauna stove: the main heater unit. See individual product page for full stove specifications.
Harvia chimney kit: complete flue system components sized for this stove.
Protective floor and wall components: bedding and sheath elements required for clearance compliance.
Harvia sauna stones: 4-6 inch (10-15 cm) stones, the size the M3 takes. The M3 holds 66 lbs (30 kg).
This stove requires a chimney system running through the wall or ceiling of your sauna room. Most installations use the Harvia chimney kit, WHP1500 (stainless) or WHP1500M (black), which is built for the standard 4.5 inches (115 mm) flue. For higher ceilings, add extension pipes WHP500 (1.64 ft) or WHP1000 (3.3 ft). A protective sheath is required if the stove is within minimum clearance distance of combustible walls. We confirm the correct chimney kit for your ceiling height before your order ships. Call 866-861-6317 for pre-installation documentation for your contractor.
On the investment: A wood-burning sauna stove built to Harvia's quality standard should last 20-30 years under regular use. Spread across years of daily sessions, the cost per use is much lower than most buyers expect. This is not a piece of equipment you replace on a schedule. It is one you pass on.
The Harvia complete installation kits include the sauna stove unit, a matched Harvia chimney kit, protective floor and wall bedding components, and Harvia sauna stones in the 4-6 inch size the stove takes. All components are sourced to be compatible with each other. Contact RecovAthlete at 866-861-6317 for specific component lists for your kit.
Stove figures from the Harvia wood stove manual (Y05-0109), Table 1 and Figures 7 and 8, and Harvia's WKM3 product page.
Swipe to see every kit part
| Kit part | Harvia code | What it does |
|---|---|---|
| Wood-burning stove | WKM3 | Heats the sauna and stones |
| Steel chimney kit | WHP1500 series | Carries flue gas through the ceiling and roof |
| Protective sheath | WL450 (M series) | Cuts side and rear clearance to 2 in / 50 mm |
| Protective bedding | WL100 | Shields tile or wood flooring under the stove |
| Sauna stones | 4 to 6 in / 10 to 15 cm | Fill the stove stone space |
Swipe to see every option
| Deciding factor | M3 kit (this page) | M3 stove only | M3 SL stove |
|---|---|---|---|
| Output | 16.5 kW | 16.5 kW | 16.5 kW |
| Room volume | 212 to 459 cu ft / 6 to 13 m³ | 212 to 459 cu ft / 6 to 13 m³ | 212 to 459 cu ft / 6 to 13 m³ |
| Where you load wood | Inside the sauna | Inside the sauna | From outside, through a fireproof wall |
| Chimney, sheath, bedding, stones | Included | Sold separately | Sold separately |
| Pick it if | New build, all parts matched | Chimney and shields already fitted | You want to fire from the next room |
| Your situation | Best pick |
|---|---|
| Small sauna, new build | M3 kit |
| Small sauna, chimney already in place | M3 stove only |
| Room of 353 to 706 cu ft (10 to 20 m³) | Legend 240 GreenFlame package |

+$428 / +$614
Adds insulated chimney height to the WHP1500 kit. See the Harvia chimney extension.

+$212
Adds single-wall pipe inside the sauna below the insulated chimney. See the Harvia 4.5 in smoke pipe.
Sold separately: chimney extensions for taller roofs; floor protection in front of the door on a combustible floor.
Replacement parts: the M3 replacement door (WX048) is listed on RecovAthlete; Harvia lists other spare parts at spareparts.harvia.com.
Harvia heaters carry Harvia's limited warranty against defects in materials and workmanship. In North America, Harvia US Inc. provides the warranty. It covers the first purchaser of a new heater bought from Harvia or an authorized dealer.
Full terms: harvia.com/en/warranty
Questions before you order? Call (866) 861-6317, 9am to 6pm EST, Monday to Friday, or email info@recovathlete.com.
The WHP1500 series kit suits a standard ceiling and roof. For a taller run, add WHP1000 or WHP500 insulated sections, or extra smoke pipe below them. Send us your ceiling height and roof build and we confirm the parts before shipping.
Yes. Harvia's manual covers a masonry flue through the back or top opening. The top route needs a 45° or 90° angled smoke pipe. Seal the pipe into the fireproof wall with fireproof mineral wool.
Only plain concrete of 2.4 in (60 mm) or more can take the stove directly. Harvia says tile adhesives and waterproofing cannot take the heat, so tile and wood floors get the bedding included here.
Harvia rates it for 6 to 13 m³. Bare surfaces raise the need: Harvia's own example puts a 10 m³ room with a glass door at about 12 m³, and a 10 m³ log room at about 15 m³.
Harvia's maximum is 30 kg (66 lb) of 4 to 6 in stones. Wash them first, cover the stove body, and avoid a high heap on top.
Dry firewood only, 3.1 to 5.9 in (8 to 15 cm) across and no longer than 13.8 in (35 cm). Never burn chipboard, pellets, painted wood, plastics, garden waste or liquid fuel.
The first firing burns off the protective paint and makes smoke. Harvia suggests heating the bare stove outdoors first if you can. After install, heat the sauna once with good ventilation until the smell stops.
Close the ash box, the stove door and any damper. Call the local fire authority, and never use water. A chimney sweep must check the stove and flue before you use them again.
Buying for yourself, spread the cost through Affirm at checkout. Buying for a gym, clinic, spa, or studio, apply with one of four business lenders and put the whole room on a single application.
RecovAthlete has no control over any financing decision. Approval is based on your creditworthiness and is solely the lender's decision.
Affirm at checkout. Rates run 0% to 36% APR based on your credit profile. Soft check to prequalify, so no impact on your score. No prepayment penalty.
Brickhouse Capital, Reliant Capital, Acorn Finance, or KWIPPED. Apply with two of the four and compare. Financed equipment can qualify for a Section 179 deduction. Confirm with your accountant.
Every page below has real prices, real monthly payment examples, and the lender comparison for that category. Pick the one you are buying.
Most business buyers are not buying one machine. They are building a room. Sauna, cold plunge, red light, vibration, hyperbaric, cryotherapy, and halotherapy all finance on the same paper through the same four lenders, and RecovAthlete quotes every category on one purchase order.
That means one freight schedule, one install window, and one financing application instead of six. It also gets you a better rate, because a bigger number on one application beats six small ones with six hard inquiries.
See commercial recovery equipment financing, or call 866-861-6317 and we will price the room.
| Lender | Type | Amount | Speed | Best for |
|---|---|---|---|---|
| Affirm | Consumer, at checkout | Order total | Seconds | Personal purchases. 0% to 36% APR based on credit. Soft check to prequalify. |
| Brickhouse Capital | Direct equipment lender | Up to $250K on a one-page application, $1M+ with financials | ~24 hours | A full room or a full floor. Credit decisions made in-house. Tied to the business, not your personal credit report. |
| Reliant Capital | Lender and broker | Up to $500K application-only, $5M with financials | 2 to 4 hours | Medical, aesthetic, and wellness. Deferred payment options. New or used equipment. |
| Acorn Finance | Lending marketplace | $1,000 to $100,000 | 60 seconds to prequalify | Comparing offers. One application goes to 30 or more lenders with no impact to your score. |
| KWIPPED (APPROVE) | Lender marketplace | Minimum $1,500 equipment value | 60-second application | Larger commercial orders. Lenders compete, which usually returns the best APR. Businesses only. |
Apply with two of the four and compare. It costs nothing and the spread between offers is often significant.
Apply with Brickhouse Capital
Apply with Reliant Capital
Check your offers with Acorn Finance
For KWIPPED, call 866-861-6317 or email info@recovathlete.com and we will build the application around your order.
Pay in 4 splits the purchase into four interest-free payments charged every two weeks. Monthly installments spread the cost over a longer term, with rates from 0% to 36% APR depending on your credit profile. You see the exact terms before you agree to anything. No origination fees, no prepayment penalty, no late fees.
Prequalification does not. Affirm and Acorn Finance both run a soft check to show you offers, which has no impact on your score. Proceeding with a monthly installment plan or a business loan may involve a hard inquiry. That is why it pays to prequalify with more than one lender first and only proceed with the best offer.
Yes, and for most business buyers it is the better route. Brickhouse funds up to $250,000 on a one-page application with no financial statements. Reliant approves in 2 to 4 hours. Business financing is usually tied to the business rather than your personal credit report, and financed equipment can qualify for a Section 179 deduction. Confirm the tax position with your accountant.
No. This is the most common and most expensive mistake. Separate applications mean separate hard inquiries, separate payments, and a worse rate on each, because every individual ticket is small. Get one quote from RecovAthlete covering everything you are buying, including freight, and put that single number on one application.
Financed equipment can qualify. Section 179 lets US businesses deduct the cost of qualifying equipment in the year it is placed in service, and financing the purchase does not by itself disqualify it. The equipment must be in service, not merely ordered, within the tax year. Annual limits and eligibility rules are set by the IRS and change year to year, so consult your accountant.
Freight, yes. On Affirm it is part of the order total at checkout. On business financing, put freight on the RecovAthlete quote and the whole quote amount goes on the application. Installation and room construction are harder, because some equipment lenders will not fund non-equipment costs. Ask the lender before you sign.
Yes. Affirm charges no prepayment penalties. Acorn Finance and most business lenders also allow early payoff without penalty.
Tell us what you are buying and whether it is personal or for a business. We will point you at the right two lenders and quote freight and install as one number, which is also the number that goes on the application.
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