Finnleo NorthStar Indoor Sauna

Finnleo NorthStar Indoor Sauna Series – Authentic Finnish Saunas Made in the USA

Bring the genuine Finnish sauna experience home with the Finnleo NorthStar Indoor Sauna series, a full lineup of pre-built, panel-constructed saunas proudly made in the USA and hand-crafted in Cokato, Minnesota. Available in five configurations — NSI-44 (1.7 kW), NSI-44 (2.2 kW), NSI-46, NSI-56, and NSI-57 — the NorthStar series lets you choose the footprint and heater output that fits your space, from a compact 4' x 4' two-person retreat to a spacious 5' x 7' sauna built for family and friends. Every model shares the same authentic Nordic construction, premium materials, and smart app-controlled features, so you can size up or down without compromising on quality.

Each NorthStar sauna ships as a modular panel design that assembles quickly with no custom carpentry required. Beautiful Nordic White Spruce, an included heater sized to the model, and RGBW color therapy lighting come standard across the entire series, making every size a warm, inviting addition to any room in the house.

Authentic Nordic Construction Across Every Size

All NorthStar models feature pre-built Nordic White Spruce interior and exterior walls and ceiling, a wood prized in traditional Finnish sauna building for its light, bright appearance, low resin content, and subtle natural aroma when heated. As free-standing, modular panel saunas, every size in the series ships pre-fabricated and installs quickly on-site, with no finishing work required regardless of whether you choose the compact NSI-44 or the largest NSI-57.

Premium Bench & Backrest Materials

Benches, backrests, and duckboard flooring throughout the series are crafted from Abachi (or similar white wood), a light-toned hardwood selected for its bright appearance and comfortable, cooler-to-the-touch surface. Bench configurations are sized to each model, seating 2 people in the NSI-44, up to 3 in the NSI-46, and up to 4–6 people in the larger NSI-56 and NSI-57, with raised duckboard promoting airflow and moisture drainage in every size.

Heater Sized to Your Model

Every NorthStar sauna includes a heater matched to its cabin size:

• NSI-44: 120-volt stainless steel "Junior" heater available in 1.7 kW or 2.2 kW, with a standard cord and plug for true plug-and-play installation on a regular 120V outlet — no dedicated 240V circuit needed.
• NSI-46, NSI-56, and NSI-57: Designer-SL2 heater sized to the cabin, hardwired on a dedicated 240-volt circuit, with a protective heater guard included as standard.

Every Finnleo heater, regardless of model, is safety-tested and listed for use in North America and fully integrates with the SaunaLogic2® control system.

Smart, App-Controlled Experience

All NorthStar models come equipped with SaunaLogic2® Wi-Fi control, letting you manage heat, session timing, and lighting remotely from the SaunaLogic2 worldwide mobile app. Preheat before you arrive, set custom lighting scenes, and monitor your session from your smartphone — the same connected ecosystem across every size in the series.

Ambient Lighting & Audio

Every NorthStar sauna features in-backrest low-voltage LED RGBW color therapy lighting as standard, creating a customizable, spa-like glow for relaxation or chromotherapy. Larger models (NSI-46, NSI-56, and NSI-57) also offer integrated Bluetooth audio compatibility, letting you stream music directly into the cabin for a fully immersive session.

All-Glass Door & Window Options

The NSI-56 and NSI-57 feature a full all-glass door for an open, modern look and maximum natural light. The NSI-46 includes a glass door with sidelight window, while the compact NSI-44 is designed with a space-efficient door suited to its smaller footprint. Every door is built for durability and a comfortable seal in high-heat conditions.

Flooring by Model

The NSI-44 includes an integral floor with a waterproof surface as standard, making it a genuinely complete, self-contained unit. On the larger NSI-46, NSI-56, and NSI-57, flooring is available as an optional add-on, allowing you to install the sauna over existing tile, concrete, or other suitable flooring in your home.

What's Included as Standard (All Models)

• Nordic White Spruce interior and exterior construction
• Heater sized to the model, with heater guard (NSI-46/56/57) or cord-and-plug Junior heater (NSI-44)
• Abachi (or similar white wood) benches, backrests, and duckboard
• In-backrest LED RGBW color therapy lighting
• All-glass or glass-and-sidelight door, depending on model
• SaunaLogic2® Wi-Fi control with worldwide mobile app
• RENTO Pisara bucket and ladle
• Modular panel construction for fast, straightforward assembly

Specifications at a Glance

• NSI-44: 4' x 4' footprint, seats 2, 120V Junior heater (1.7 kW or 2.2 kW), integral waterproof floor included
• NSI-46: 4' x 6' footprint, seats up to 3, Designer-SL2 heater, 240V, optional floor
• NSI-56: 5' x 6' footprint, seats up to 4–5, Designer-SL2 6.0 kW heater, 240V, optional floor
• NSI-57: 5' x 7' footprint, seats up to 5–6, Designer-SL2 heater, 240V, optional floor
• Interior/exterior wood: Nordic White Spruce (all models)
• Bench material: Abachi (or similar white wood) (all models)
• Control system: SaunaLogic2® Wi-Fi with app control (all models)
• Country of origin: Made in the USA (Cokato, Minnesota)

Good to Know

Flooring is included only on the NSI-44; the NSI-46, NSI-56, and NSI-57 offer an optional floor purchased separately. The NSI-44's Junior heater runs on a standard 120-volt outlet with cord and plug, while the NSI-46, NSI-56, and NSI-57 require a dedicated 240-volt circuit. All NorthStar models are part of a ready-to-order series, meaning no substitutions are available on any size — each ships as a complete, consistent package for simplified ordering and installation.

Why Choose the NorthStar Series

The NorthStar series gives you the flexibility to choose the exact sauna size that fits your space and household, from a compact two-person retreat to a full family-sized sauna, without sacrificing the authentic Finnish materials, construction quality, or smart features that define every Finnleo sauna. Whichever size you choose, you get the same health and wellness benefits associated with regular sauna use — improved circulation, muscle recovery, stress relief, and relaxation — in a package that installs quickly and is ready to enjoy in days, not months.

Why Buy Finnleo From Us

Finnleo, built by Sauna360 in Cokato, Minnesota, is one of the most trusted names in authentic Finnish sauna. Every heater across the NorthStar series is safety-tested and listed for use in North America, and the SaunaLogic2® ecosystem ties your heater, lighting, and audio into one seamless, app-controlled experience. As an authorized Finnleo dealer, we offer full factory warranty coverage, expert sizing help, and dedicated support before and after your purchase. Have a question about which NorthStar size, heater option, voltage, or lead time is right for you? Reach out and a sauna specialist will help you spec it correctly the first time.