FINSAUNA Radia TIR 400 (4-Person At-Home Sauna with Infrared + Traditional Heat)

Picture your ideal weeknight reset in South Florida: you’re home, you want to slow down, and you want an at-home sauna session that fits real life. The FINSAUNA Radia TIR 400 is built for that. It’s a 4-person at-home sauna that gives you room to share the experience with family or friends, while still feeling simple enough to use consistently.

Most buyers have the same hesitations before upgrading to a larger at-home sauna. Will it heat up fast enough to be practical on weekdays? Will it feel safe and reliable? And will it be flexible enough to match different preferences in the same household? The Radia TIR 400 addresses those concerns with clear, everyday-ready features. It’s designed to reach 170°F in less than an hour on a standard home outlet, so this at-home sauna doesn’t become a “weekend only” purchase.

Where this model stands out is versatility. The FINSAUNA Radia TIR 400 combines UL-Listed short-wave infrared heaters with a traditional sauna heater, so your at-home sauna sessions can match what you want that day. On top of that, it includes a medical-grade chromotherapy LED panel, letting you tailor the atmosphere without adding extra devices or clutter. The benefit is simple: one at-home sauna can serve multiple routines, from a quick heat session after work to a calmer, longer wind-down at night.

Build quality is a big part of long-term satisfaction, and the Radia TIR 400 is made to feel like a premium, permanent addition to your home. The interior and exterior use Canadian Hemlock, chosen for durability and stability in heat. It’s paired with double-wall construction and 8mm tempered glass for heat retention and a solid, finished feel that holds up to regular use—exactly what people want in an at-home sauna they plan to keep.

Comfort is built into the layout. This 4-person at-home sauna includes a two-tier bench system, giving you flexible seating and a more comfortable way to share sessions. And because audio is a feature people actually use, the Radia TIR 400 includes a built-in LCD touchscreen control with Bluetooth audio, plus 6″ speakers so your at-home sauna time can be quiet, focused, or set to your favorite playlist.

Planning is straightforward, which matters when you’re placing an at-home sauna in a home gym, wellness room, or dedicated spa space. The Radia TIR 400 accommodates up to 4 bathers with interior dimensions of 71″W x 57.5″D x 75.5″H and exterior dimensions of 75″W x 64″D x 83″H. It’s designed to run on a standard home outlet, helping reduce installation complexity compared with models that require advanced electrical work.

If you want an elevated look / extra comfort experience, the included lighting features are a big part of what makes this at-home sauna enjoyable to use consistently. The LED ceiling lights and chromotherapy options let you create a calmer atmosphere at night or a brighter, more energizing session when you prefer.

Important planning note: the Radia TIR 400 is designed to reach 170°F in less than an hour on a standard home outlet. As with any at-home sauna, placement and power access should be planned so the sauna sits safely and is used as intended.

Product Highlights

• FINSAUNA Radia TIR 400 4-person infrared sauna designed for consistent home use

• Designed to reach 170°F in less than 1 hour on a standard home outlet

• Versatile system with short-wave infrared heaters plus a traditional sauna heater

• Includes a medical-grade chromotherapy LED panel for adjustable session atmosphere

• UL Safety-Listed for peace of mind

• Canadian Hemlock interior and exterior for durable, premium build quality

• Built-in LCD touchscreen control with Bluetooth audio

• Audio system with 6″ speakers

• 8mm tempered glass for heat retention and a clean, modern look

• Double-wall construction for a solid, finished feel

• LED ceiling lights and mood-friendly lighting options

• Two-tier bench system for flexible, comfortable seating

• Interior: 71″W x 57.5″D x 75.5″H

• Exterior: 75″W x 64″D x 83″H

• Capacity: up to 4 bathers

Come to our Hollywood, FL showroom—because the best sauna is the one that fits your space and feels right when you sit in it.

Call Sauna & Steam Center at 954-744-5395 for availability, options, and a fast ‘will this work in my home?’ check. Or visit our Hollywood showroom to see materials and sizing in person and buy with confidence.