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

Finnish Saunas

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.

Filters

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Finnish Sauna Builders Harvia Linear WL425 16 Protective Sheath (side) - Finnish Sauna Builders — exterior view Sold out
$264.00 - $264.00
$264.00
$264.00 - $264.00
$264.00

Harvia Linear WL425 16 Protective Sheath (side) - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Linear WL425 16 Protective Sheath (side) The Harvia WL425 protective sheath is designed and approved for wood-heated Harvia stoves (Harvia 1...

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$264.00 - $264.00
$264.00
$264.00 - $264.00
$264.00
Sold out
Finnish Sauna Builders Harvia Linear 22 Protective Sheath (side) - Finnish Sauna Builders — exterior view Sold out
$300.00 - $300.00
$300.00
$300.00 - $300.00
$300.00

Harvia Linear 22 Protective Sheath (side) - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Linear 22 Protective Sheath (side) The Harvia WL525 protective sheath is designed and approved for wood-heated Harvia stoves (Harvia 22/Line...

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$300.00 - $300.00
$300.00
$300.00 - $300.00
$300.00
Sold out
Finnish Sauna Builders Harvia WL100 Protective Bedding (floor) - Finnish Sauna Builders — exterior view Sold out
$355.00 - $355.00
$355.00
$355.00 - $355.00
$355.00

Harvia WL100 Protective Bedding (floor) - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

The Harvia WL100 Protective Bedding is a floor-protection panel that shields the surface beneath your Harvia stove — essential for safe, code-consc...

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$355.00 - $355.00
$355.00
$355.00 - $355.00
$355.00
Sold out
Finnish Sauna Builders Harvia Linear WL580 22 Es Protective Sheath (side & Rear) - Finnish Sauna Builders — exterior view Sold out
$533.00 - $533.00
$533.00
$533.00 - $533.00
$533.00

Harvia Linear WL580 22 Es Protective Sheath (side & Rear) - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Linear WL580 22 Es Protective Sheath (side & Rear)  The Harvia WL580 protective sheath is designed and approved for wood-heated Harvia s...

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$533.00 - $533.00
$533.00
$533.00 - $533.00
$533.00
Sold out
Finnish Sauna Builders Harvia Chimney Smoke Pipe WZ11520 115 mm Stainless Steel - Finnish Sauna Builders — exterior view
Sold out
$101.00 - $101.00
$101.00
$101.00 - $101.00
$101.00

Harvia Chimney Vent Pipe WZ11520 115 mm Stainless Steel - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

The Harvia WZ11520 Vent Pipe is a 115 mm stainless steel chimney vent pipe for Harvia wood-burning sauna stoves.Key features Stainless steel const...

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$101.00 - $101.00
$101.00
$101.00 - $101.00
$101.00
Sold out
Finnish Sauna Builders Harvia Steel Chimney 1500 - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia Steel Chimney 1500 - Finnish Sauna Builders — exterior view
Sold out
$1,443.00 - $1,443.00
$1,443.00
$1,443.00 - $1,443.00
$1,443.00

Harvia Steel Chimney 1500 - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Steel Chimney 1500 The Harvia WHP1500 steel chimney is a stylish, stainless steel chimney solution that is easy to install. The steel chimn...

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$1,443.00 - $1,443.00
$1,443.00
$1,443.00 - $1,443.00
$1,443.00
Sold out
Finnish Sauna Builders Harvia Linear WL585 Ls/rs Protective Sheath (side & Rear) - Finnish Sauna Builders — exterior view
Sold out
$542.00 - $542.00
$542.00
$542.00 - $542.00
$542.00

Harvia Linear WL585 Ls/rs Protective Sheath (side & Rear) - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Linear WL585 Ls/rs Protective Sheath (side & Rear) The Harvia WL585 protective sheath is designed and approved for wood-heated Harvia st...

View full details
$542.00 - $542.00
$542.00
$542.00 - $542.00
$542.00
Sold out
Finnish Sauna Builders Harvia Protective Bedding WL110 (floor) For Harvia 20 Ls/rs Pro36 & Duo36 - Finnish... — exterior view
Sold out
$509.00 - $509.00
$509.00
$509.00 - $509.00
$509.00

Harvia Protective Bedding WL110 (floor) For Harvia 20 Ls/rs Pro36 & Duo36 - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Protective Bedding WL110 (floor) For Harvia 20 Ls/rs Pro36 & Duo36 The Harvia WL110 is made of aluminum-zinc-coated steel sheet which is...

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$509.00 - $509.00
$509.00
$509.00 - $509.00
$509.00
Sold out
Finnish Sauna Builders Harvia Water Heater - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia Water Heater - Finnish Sauna Builders — exterior view
Sold out
$706.00 - $706.00
$706.00
$706.00 - $706.00
$706.00

Harvia Water Heater - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Water Heater The Harvia pipe model water heater is placed directly on top of the stove, and the tank holds 22 liters of water. The water hea...

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$706.00 - $706.00
$706.00
$706.00 - $706.00
$706.00
Sold out
Finnish Sauna Builders Harvia Masonry Connector WZ011115 Stainless Steel - Finnish Sauna Builders — exterior view
Sold out
$85.00 - $85.00
$85.00
$85.00 - $85.00
$85.00

Harvia Masonry Connector WZ011115 Stainless Steel - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Masonry Connector WZ011115 Stainless Steel The Harvia WZ011115 masonry connector is made of stainless steel. Why buy your Harvia Masonry Co...

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$85.00 - $85.00
$85.00
$85.00 - $85.00
$85.00
Sold out
Finnish Sauna Builders Harvia Water Heater WP250TH For Harvia Thermio - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia Water Heater WP250TH For Harvia Thermio - Finnish Sauna Builders — exterior view
Sold out
$702.00 - $702.00
$702.00
$702.00 - $702.00
$702.00

Harvia Water Heater WP250TH For Harvia Thermio - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Water Heater WP250TH For Harvia Thermio The stylish steel outer shell of the Thermio water heater suits any sauna. The Thermio water heater ...

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$702.00 - $702.00
$702.00
$702.00 - $702.00
$702.00
Sold out
Finnish Sauna Builders Harvia Vapour Barrier WHM25 225-250 Mm - Finnish Sauna Builders — exterior view
Sold out
$300.00 - $300.00
$300.00
$300.00 - $300.00
$300.00

Harvia Vapour Barrier WHM25 225-250 Mm - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Vapour Barrier WHM25 225-250 Mm The Harvia vapor barrier prevents water vapor from entering the building structure. Why buy your Harvia Vap...

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$300.00 - $300.00
$300.00
$300.00 - $300.00
$300.00
Sold out
Finnish Sauna Builders Harvia Steel Chimney WHP1500M Black - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Harvia Steel Chimney WHP1500M Black - Finnish Sauna Builders — exterior view
Sold out
$1,532.00 - $1,532.00
$1,532.00
$1,532.00 - $1,532.00
$1,532.00

Harvia Steel Chimney WHP1500M Black - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Steel Chimney WHP1500M Black The Harvia WHP1500 steel chimney is a stylish, easy-to-install chimney solution made of black powder-coated ste...

View full details
$1,532.00 - $1,532.00
$1,532.00
$1,532.00 - $1,532.00
$1,532.00
Sold out
Finnish Sauna Builders Harvia Chimney Smoke Pipe WZ115100 115 mm Stainless Steel - Finnish Sauna Builders — exterior view
Sold out
$206.00 - $206.00
$206.00
$206.00 - $206.00
$206.00

Harvia Chimney Smoke Pipe WZ115100 115 mm Stainless Steel - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Chimney Smoke Pipe WZ115100 115 mm Stainless Steel The Harvia WZ115100 Chimney Smoke Pipe in Stainless Steel is designed and approved for wo...

View full details
$206.00 - $206.00
$206.00
$206.00 - $206.00
$206.00
Sold out
Finnish Sauna Builders Harvia Chimney Smoke Pipe WZ11550 115 mm Stainless Steel - Finnish Sauna Builders — exterior view
Sold out
$126.00 - $126.00
$126.00
$126.00 - $126.00
$126.00

Harvia Chimney Smoke Pipe WZ11550 115 mm Stainless Steel - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

The Harvia WZ11550 Smoke Pipe is a 115 mm stainless steel smoke pipe engineered for Harvia wood-burning sauna stoves.Key features Durable stainless...

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$126.00 - $126.00
$126.00
$126.00 - $126.00
$126.00
Sold out
Finnish Sauna Builders Harvia Extension For Chimney WHP1000M Mm Black - Finnish Sauna Builders — exterior view
Sold out
$633.00 - $633.00
$633.00
$633.00 - $633.00
$633.00

Harvia Extension For Chimney WHP1000M Mm Black - Finnish Sauna Builders

Finnish Sauna Builders
Out of stock

Harvia Extension For Chimney WHP1000M Mm Black The Harvia WHP1000M steel chimney extension made of black powder-coated steel enables you to easily ...

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$633.00 - $633.00
$633.00
$633.00 - $633.00
$633.00
Sold out
Finnish Sauna Builders Custom Indoor Sauna Room - 5' x 6' x 8' - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Custom Indoor Sauna Room - 5' x 6' x 8' - Finnish Sauna Builders — exterior view
$7,566.20 - $12,792.70
$7,566.20 - $12,792.70
$7,566.20 - $12,792.70
$7,566.20

Custom Indoor Sauna Room - 5' x 6' x 8' - Finnish Sauna Builders

Finnish Sauna Builders

Custom Indoor Sauna Room - 5' x 6' x 8' - Finnish Sauna Builders — This custom-built Finnish sauna room measures 5' x 6' x 8', hand-crafted by Finn...

View full details
$7,566.20 - $12,792.70
$7,566.20 - $12,792.70
$7,566.20 - $12,792.70
$7,566.20
Finnish Sauna Builders Custom Indoor Sauna Room - 6' x 7' x 8' - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Custom Indoor Sauna Room - 6' x 7' x 8' - Finnish Sauna Builders — exterior view
$9,197.40 - $14,595.40
$9,197.40 - $14,595.40
$9,197.40 - $14,595.40
$9,197.40

Custom Indoor Sauna Room - 6' x 7' x 8' - Finnish Sauna Builders

Finnish Sauna Builders

Custom Indoor Sauna Room - 6' x 7' x 8' - Finnish Sauna Builders — This custom-built Finnish sauna room measures 6' x 7' x 8', hand-crafted by Finn...

View full details
$9,197.40 - $14,595.40
$9,197.40 - $14,595.40
$9,197.40 - $14,595.40
$9,197.40
Finnish Sauna Builders Custom Indoor Sauna Room - 5' x 5' x 8' - Finnish Sauna Builders — interior bench layout
Finnish Sauna Builders Custom Indoor Sauna Room - 5' x 5' x 8' - Finnish Sauna Builders — exterior view
$6,935.20 - $12,078.50
$6,935.20 - $12,078.50
$6,935.20 - $12,078.50
$6,935.20

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

Finnish Sauna Builders

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

View full details
$6,935.20 - $12,078.50
$6,935.20 - $12,078.50
$6,935.20 - $12,078.50
$6,935.20
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

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...

View full details
$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

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

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

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

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