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Welcome To Peak Flow Fitness | Chat With An Expert By Texting Or Calling 646-921-5221

Finnish Saunas

Not sure where to start? Read our Which Sauna Should I Get? before you buy.

Authentic Finnish-style traditional saunas — wood-burning and electric heater systems built to deliver the real Finnish löyly experience: high heat, controlled humidity, premium wood construction.

We're an authorized dealer for Finnish Sauna Builders — the premier US source for traditional Finnish saunas, including indoor cabin systems, outdoor barrel and cabin saunas, and complete sauna heater packages from Harvia (electric and wood-burning).

Choose by installation type:

  • Indoor cabin saunas — built-to-fit interior installations (basements, dedicated wellness rooms)
  • Outdoor barrel saunas — fully assembled or kit-built, weather-resistant Western Red Cedar
  • Outdoor cabin saunas — larger group capacity (4–8 person), full traditional Finnish experience
  • Replacement heaters — Harvia electric (3.5–9 kW) or wood-burning (Cilindro, M-series)

What makes Finnish saunas different:

  • Heat profile — 180°F to 200°F+ (hotter than infrared) with löyly steam from water on heated rocks
  • Wood selection — Western Red Cedar (most common), Nordic Spruce (traditional Finnish), Hemlock (entry-tier)
  • Heater requirements — electric heaters need dedicated 240V circuit; wood-burning needs proper venting
  • Construction — solid kiln-dried wood, mortise-and-tenon joinery, no MDF or veneer

Free shipping on orders over $999, exclusions apply (saunas ship freight — most include curbside delivery; white-glove and installation services available on select models).

Planning a sauna installation? Email support@peakflowfitness.com with your space (indoor vs outdoor, capacity, electrical availability) and we'll spec the right setup.

Need seating for your sauna? See Thera360 personal sauna seating.

Filters

Finnish Sauna Builders Custom Indoor Sauna Room - 6' x 8' x 8' - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Custom Indoor Sauna Room - 6' x 8' x 8' - Finnish Sauna Builders — exterior view
$9,882.80 - $15,746.50
$9,882.80 - $15,746.50
$9,882.80 - $15,746.50
$9,882.80

Custom Indoor Sauna Room - 6' x 8' x 8' - Finnish Sauna Builders

Finnish Sauna Builders
In stock

Custom Indoor Sauna Room - 6' x 8' x 8' - Finnish Sauna Builders — This custom-built Finnish sauna room measures 6' x 8' x 8', hand-crafted by Finn...

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$9,882.80 - $15,746.50
$9,882.80 - $15,746.50
$9,882.80 - $15,746.50
$9,882.80
Finnish Sauna Builders Custom Indoor Sauna Room - 5' x 8' x 8' - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Custom Indoor Sauna Room - 5' x 8' x 8' - Finnish Sauna Builders — exterior view
$8,828.20 - $14,467.80
$8,828.20 - $14,467.80
$8,828.20 - $14,467.80
$8,828.20

Custom Indoor Sauna Room - 5' x 8' x 8' - Finnish Sauna Builders

Finnish Sauna Builders
In stock

Custom Indoor Sauna Room - 5' x 8' x 8' - Finnish Sauna Builders — This custom-built Finnish sauna room measures 5' x 8' x 8', hand-crafted by Finn...

View full details
$8,828.20 - $14,467.80
$8,828.20 - $14,467.80
$8,828.20 - $14,467.80
$8,828.20
Finnish Sauna Builders Custom Indoor Sauna Room - 5' x 7' x 8' - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Custom Indoor Sauna Room - 5' x 7' x 8' - Finnish Sauna Builders — exterior view
$8,197.20 - $13,546.00
$8,197.20 - $13,546.00
$8,197.20 - $13,546.00
$8,197.20

Custom Indoor Sauna Room - 5' x 7' x 8' - Finnish Sauna Builders

Finnish Sauna Builders
In stock

Custom Indoor Sauna Room - 5' x 7' x 8' - Finnish Sauna Builders — This custom-built Finnish sauna room measures 5' x 7' x 8', hand-crafted by Finn...

View full details
$8,197.20 - $13,546.00
$8,197.20 - $13,546.00
$8,197.20 - $13,546.00
$8,197.20
Finnish Sauna Builders Custom Indoor Sauna Room - 4' x 6' x 8' - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Custom Indoor Sauna Room - 4' x 6' x 8' - Finnish Sauna Builders — exterior view
$6,900.50 - $12,123.10
$6,900.50 - $12,123.10
$6,900.50 - $12,123.10
$6,900.50

Custom Indoor Sauna Room - 4' x 6' x 8' - Finnish Sauna Builders

Finnish Sauna Builders
In stock

Custom Indoor Sauna Room - 4' x 6' x 8' - Finnish Sauna Builders — This custom-built Finnish sauna room measures 4' x 6' x 8', hand-crafted by Finn...

View full details
$6,900.50 - $12,123.10
$6,900.50 - $12,123.10
$6,900.50 - $12,123.10
$6,900.50
Finnish Sauna Builders Custom Indoor Sauna Room - 4' x 5' x 8' - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Custom Indoor Sauna Room - 4' x 5' x 8' - Finnish Sauna Builders — exterior view
$6,323.90 - $11,265.50
$6,323.90 - $11,265.50
$6,323.90 - $11,265.50
$6,323.90

Custom Indoor Sauna Room - 4' x 5' x 8' - Finnish Sauna Builders

Finnish Sauna Builders
In stock

Custom Indoor Sauna Room - 4' x 5' x 8' - Finnish Sauna Builders — This custom-built Finnish sauna room measures 4' x 5' x 8', hand-crafted by Finn...

View full details
$6,323.90 - $11,265.50
$6,323.90 - $11,265.50
$6,323.90 - $11,265.50
$6,323.90
Finnish Sauna Builders Harvia Rain Cap WZ030115 Stainless Steel - Finnish Sauna Builders — exterior view
Sold out
$69.00 - $69.00
$69.00
$69.00 - $69.00
$69.00

Harvia Rain Cap WZ030115 Stainless Steel - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Rain Cap WZ030115 Stainless Steel The Harvia WZ030115 rain cap is made of stainless steel. Why buy your Harvia Rain Cap WZ030115 Stainless ...

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$69.00 - $69.00
$69.00
$69.00 - $69.00
$69.00
Sold out
Finnish Sauna Builders Harvia Spirit SP80E 8KW Sauna Heater - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia Spirit SP80E 8KW Sauna Heater - Finnish Sauna Builders — exterior view
Sold out
$1,725.00 - $1,725.00
$1,725.00
$1,725.00 - $1,725.00
$1,725.00

Harvia Spirit SP80E 8KW Sauna Heater - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Spirit SP80E 8KW Sauna Heater The Harvia Spirit electric sauna heater, elevates your sauna sessions by combining the efficiency and design H...

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$1,725.00 - $1,725.00
$1,725.00
$1,725.00 - $1,725.00
$1,725.00
Sold out
Finnish Sauna Builders Harvia Reducing Pipe WZ115120 Stainless Steel - Finnish Sauna Builders — exterior view
Sold out
$75.00 - $75.00
$75.00
$75.00 - $75.00
$75.00

Harvia Reducing Pipe WZ115120 Stainless Steel - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Reducing Pipe WZ115120 Stainless Steel The Harvia WZ115120 adapter pipe is made of stainless steel. Why buy your Harvia Reducing Pipe WZ115...

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$75.00 - $75.00
$75.00
$75.00 - $75.00
$75.00
Sold out
Finnish Sauna Builders Harvia 20 Pro/sl/duo/boiler/sl Boiler Protective Sheath (side & Rear) - Finnish Saun... — exterior view
Sold out
$498.00 - $498.00
$498.00
$498.00 - $498.00
$498.00

Harvia 20 Pro/sl/duo/boiler/sl Boiler Protective Sheath (side & Rear) - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia 20 Pro/sl/duo/boiler/sl Boiler Protective Sheath (side & Rear) Harvia wood heater protective shields, for side and rear. Use for Harvia ...

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$498.00 - $498.00
$498.00
$498.00 - $498.00
$498.00
Sold out
Finnish Sauna Builders Harvia 36/duo Protective Sheath (side & Rear) - Finnish Sauna Builders — exterior view
Sold out
$531.00 - $531.00
$531.00
$531.00 - $531.00
$531.00

Harvia 36/duo Protective Sheath (side & Rear) - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia 36/duo Protective Sheath (side & Rear) Harvia wood heater protective shields, for side and rear. Use for Harvia 36/Duo. The protective s...

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$531.00 - $531.00
$531.00
$531.00 - $531.00
$531.00
Sold out
Finnish Sauna Builders Harvia Adapter Pipe WZ115155 4" to 6" - Finnish Sauna Builders — exterior view
Sold out
$105.00 - $105.00
$105.00
$105.00 - $105.00
$105.00

Harvia Adapter Pipe WZ115155 4" to 6" - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Adapter Pipe WZ115155 4" to 6" With this simple adapter pipe, your new Harvia wood-burning sauna heater will connect easily to any 6" chimne...

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$105.00 - $105.00
$105.00
$105.00 - $105.00
$105.00
Sold out
Finnish Sauna Builders Harvia Spirit SP60E 6KW Sauna Heater - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia Spirit SP60E 6KW Sauna Heater - Finnish Sauna Builders — exterior view
Sold out
$1,665.00 - $1,665.00
$1,665.00
$1,665.00 - $1,665.00
$1,665.00

Harvia Spirit SP60E 6KW Sauna Heater - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Spirit SP60E 6KW Sauna Heater The Harvia Spirit electric sauna heater, is a testament to Harvia's dedication to quality and performance. Thi...

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$1,665.00 - $1,665.00
$1,665.00
$1,665.00 - $1,665.00
$1,665.00
Sold out
Finnish Sauna Builders Harvia Angle Pipe WZ45ST Stainless Steel - Finnish Sauna Builders — exterior view
Sold out
$172.00 - $172.00
$172.00
$172.00 - $172.00
$172.00

Harvia Angle Pipe WZ45ST Stainless Steel - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Angle Pipe WZ45ST Stainless Steel The Harvia WZ45ST 45°-angle smoke pipe is made of stainless steel, being compatible with all Harvia wood-h...

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$172.00 - $172.00
$172.00
$172.00 - $172.00
$172.00
Sold out
Finnish Sauna Builders Harvia Radiation Cover WZ020130 Stainless Steel - Finnish Sauna Builders — exterior view
Sold out
$64.00 - $64.00
$64.00
$64.00 - $64.00
$64.00

Harvia Radiation Cover WZ020130 Stainless Steel - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Radiation Cover WZ020130 Stainless Steel The Harvia sauna light and shades fill your sauna with pleasant, soft light that complements the ha...

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$64.00 - $64.00
$64.00
$64.00 - $64.00
$64.00
Sold out
Finnish Sauna Builders Harvia 20 Sl Wood Burning Sauna Stove - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia 20 Sl Wood Burning Sauna Stove - Finnish Sauna Builders — exterior view
Sold out
$1,781.00 - $1,781.00
$1,781.00
$1,781.00 - $1,781.00
$1,781.00

Harvia 20 Sl Wood Burning Sauna Stove - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia 20 Sl Wood Burning Sauna Stove The SL models are designed for people who want to conveniently heat their sauna from another room or outside ...

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$1,781.00 - $1,781.00
$1,781.00
$1,781.00 - $1,781.00
$1,781.00
Sold out
Finnish Sauna Builders Harvia Virta 9KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Ston... — interior bench layout
Finnish Sauna Builders Harvia Virta 9KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Stones and H... — exterior view
Sold out
$3,934.00 - $3,934.00
$3,934.00
$3,934.00 - $3,934.00
$3,934.00

Harvia Virta 9KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Stones and Heater Guard - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Virta 9KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Stones and Heater Guard The Harvia Virta HL90 is a 9kW floor-standing elect...

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$3,934.00 - $3,934.00
$3,934.00
$3,934.00 - $3,934.00
$3,934.00
Sold out
Finnish Sauna Builders Harvia Virta 10.5KW Ultimate Sauna Heater with WiFi Digital Control, Sauna S... — interior bench layout
Finnish Sauna Builders Harvia Virta 10.5KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Stones an... — exterior view
Sold out
$4,484.00 - $4,484.00
$4,484.00
$4,484.00 - $4,484.00
$4,484.00

Harvia Virta 10.5KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Stones and Heater Guard - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Virta 10.5KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Stones and Heater Guard The Harvia Virta HL110 is a 10.5kW floor-standin...

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$4,484.00 - $4,484.00
$4,484.00
$4,484.00 - $4,484.00
$4,484.00
Sold out
Finnish Sauna Builders Harvia Xenio CX30-U1-U3-XW Digital Sauna Control with Wi-Fi - Finnish Sauna... — interior bench layout
Finnish Sauna Builders Harvia Xenio CX30-U1-U3-XW Digital Sauna Control with Wi-Fi - Finnish Sauna Builders — exterior view
Sold out
$945.00 - $945.00
$945.00
$945.00 - $945.00
$945.00

Harvia Xenio CX30-U1-U3-XW Digital Sauna Control with Wi-Fi - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Xenio CX30-U1-U3-XW Digital Sauna Control with Wi-Fi Connectivity Upgrade your sauna experience with the Harvia Xenio CX30-U1-U3-XW, the ult...

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$945.00 - $945.00
$945.00
$945.00 - $945.00
$945.00
Sold out
Finnish Sauna Builders Harvia Virta 6KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Ston... — interior bench layout
Finnish Sauna Builders Harvia Virta 6KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Stones and H... — exterior view
Sold out
$3,812.00 - $3,812.00
$3,812.00
$3,812.00 - $3,812.00
$3,812.00

Harvia Virta 6KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Stones and Heater Guard - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Virta 6KW Ultimate Sauna Heater with WiFi Digital Control, Sauna Stones and Heater Guard The Harvia Virta HL60 is a 6kW floor-standing elect...

View full details
$3,812.00 - $3,812.00
$3,812.00
$3,812.00 - $3,812.00
$3,812.00
Sold out
Finnish Sauna Builders Harvia Club KG12G-U3W 12KW Sauna Heater - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia Club KG12G-U3W 12KW Sauna Heater - Finnish Sauna Builders — exterior view
Sold out
$2,086.00 - $2,086.00
$2,086.00
$2,086.00 - $2,086.00
$2,086.00

Harvia Club KG12G-U3W 12KW Sauna Heater - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Club KG12G-U3W 12KW Sauna Heater  The Harvia K125G-U3-NC Club Series 12.5kW Electric Sauna Heater is a high-performance commercial sauna hea...

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$2,086.00 - $2,086.00
$2,086.00
$2,086.00 - $2,086.00
$2,086.00
Sold out
Finnish Sauna Builders Harvia Pro 20 Es Pro Wood Burning Sauna Stove With Water Tank - Finnish Saun... — interior bench layout
Finnish Sauna Builders Harvia Pro 20 Es Pro Wood Burning Sauna Stove With Water Tank - Finnish Sauna Builders — exterior view
Sold out
$2,153.00 - $2,153.00
$2,153.00
$2,153.00 - $2,153.00
$2,153.00

Harvia Pro 20 Es Pro Wood Burning Sauna Stove With Water Tank - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Pro 20 Es Pro Wood Burning Sauna Stove With Water Tank The Harvia 20 ES Pro stove is a popular choice for cottage saunas ‒ thanks to its pra...

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$2,153.00 - $2,153.00
$2,153.00
$2,153.00 - $2,153.00
$2,153.00
Sold out
Finnish Sauna Builders Harvia Vega Compact 3500 3.5KW Sauna Heater with Built-in Control - Finnish... — interior bench layout
Finnish Sauna Builders Harvia Vega Compact 3500 3.5KW Sauna Heater with Built-in Control - Finnish Sauna Bu... — exterior view
Sold out
$860.00 - $860.00
$860.00
$860.00 - $860.00
$860.00

Harvia Vega Compact 3500 3.5KW Sauna Heater with Built-in Control - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Vega Compact 3500 3.5KW Sauna Heater with Built-in Control The Harvia Vega Compact 3500 is a space-efficient, wall-mounted 3.5kW electric sa...

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$860.00 - $860.00
$860.00
$860.00 - $860.00
$860.00
Sold out
Finnish Sauna Builders Harvia Spirit SP90E 9KW Sauna Heater - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia Spirit SP90E 9KW Sauna Heater - Finnish Sauna Builders — exterior view
Sold out
$1,930.00 - $1,930.00
$1,930.00
$1,930.00 - $1,930.00
$1,930.00

Harvia Spirit SP90E 9KW Sauna Heater - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Spirit SP90E 9KW Sauna Heater Experience elevated relaxation with the Harvia Spirit electric sauna heater, a powerful fusion of Finnish craf...

View full details
$1,930.00 - $1,930.00
$1,930.00
$1,930.00 - $1,930.00
$1,930.00
Sold out
Finnish Sauna Builders Harvia Linear 16 WK160C Wood Burning Sauna Stove - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia Linear 16 WK160C Wood Burning Sauna Stove - Finnish Sauna Builders — exterior view
Sold out
$933.00 - $933.00
$933.00
$933.00 - $933.00
$933.00

Harvia Linear 16 WK160C Wood Burning Sauna Stove - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Linear 16 WK160C Wood Burning Sauna Stove The Harvia Linear 16 stove has a straightforward design and a sturdy structure. The wood-heated st...

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$933.00 - $933.00
$933.00
$933.00 - $933.00
$933.00
Sold out