Carbon Smart Finnish Sauna Room | 5' x 8'

The Finnish Sauna Builders Carbon Smart™ 5' × 8' × 8' Indoor Sauna Room Kit completes the 5-foot-wide Carbon Smart series at its most spacious — 40 square feet of interior space that accommodates four guests in genuine comfort, with enough room for a long upper bench, a lower bench tier, and the kind of open floor space between them that makes the sauna feel like a true wellness room rather than a heated closet. This is the kit for the home where the sauna is taken seriously.

With full Harvia 8KW compatibility — including the premium Cilindro PC80E WiFi with app-integrated heat scheduling — and available in Thermo Poplar or Western Red Cedar, the 5' × 8' Carbon Smart™ kit is the natural choice for households where multiple family members use the sauna regularly and where the quality of the interior experience is non-negotiable. Finnish Sauna Builders' commitment to authentic Scandinavian craft is evident in every panel, joint, and bench board.

Key Features

• Scale: 40 sq ft — 4-person genuine comfort with real floor space between benches
• Heater: Harvia KIP80B, Cilindro PC80, KIP80W WiFi, or Cilindro PC80E WiFi
• Wood Options: Thermo Poplar or Western Red Cedar
• Use Case: The serious family home sauna — for households where daily sauna use is a priority
• Craftsmanship: Finnish Sauna Builders carbon smart modular precision throughout

Specifications

• Dimensions: 5' × 8' × 8' (W × D × H)
• Capacity: 3–4 persons
• Wood: Thermo Poplar or Western Red Cedar
• Heater Range: 8KW
• Investment: From $8,828.20