FINSAUNA Radia TIR 400 sauna, front view
FINSAUNA Radia TIR 400 sauna, installed in a home

Radia TIR 400

$12,490.00

A four-person hybrid sauna with infrared heaters and a traditional sauna heater in one Canadian Hemlock cabin. Use either heat source or both. UL Safety-Listed, with an LCD touchscreen and Bluetooth audio.

In stock at our factory showroom.

The Full Sauna Experience for Four

The Radia TIR 400 is the largest hybrid in the Radia series: seating for four, short-wave infrared heaters, a traditional sauna heater, and a chromotherapy LED panel, all run from one LCD touchscreen.

Choose Your Heat

The TIR models pair infrared heaters with a traditional sauna heater in the same cabin. Use infrared for a gentler, direct warmth, the traditional heater for classic hot-air sauna heat, or both together, all from one control.

UL-Listed for Home Use

FINSAUNA lists Radia-Series infrared saunas as UL Safety-Listed, meaning the cabin has been tested and certified to UL safety standards.

Canadian Hemlock Construction

Interior and exterior are Canadian Hemlock, prized for durability, heat tolerance, and minimal warping. 8mm tempered glass holds the heat in, and Bluetooth audio and LED ceiling lights round out the cabin.

Before You Buy

Because the TIR 400 includes a traditional heater, check the electrical requirements in the installation manual below with your electrician before delivery.

Documents

Questions about pricing, delivery, or installation? Talk with a Royal Spa product specialist.

Additional information

Weight 575 lbs
Seating

4
Heat Type

Traditional, Infrared
Placement

Indoor
Exterior Dimensions

74.8" W x 63.8" D x 79.9" H
Interior Dimensions

70.5" W x 59.4" D x 74.3" H
Wood

Canadian Hemlock interior and exterior
Glass

8mm tempered glass
Heater

Short-wave infrared heaters plus a traditional sauna heater (included)
Power Requirement

See installation manual
Controls

Built-in LCD touchscreen
Audio

Bluetooth audio
Lighting

LED ceiling lights and chromotherapy LED panel
Safety Listing

UL Safety-Listed (per FINSAUNA)
Warranty

2-year residential limited warranty (FINSAUNA)

*Royal Spa products are designed to promote relaxation and general wellness and are not medical devices. They are not intended to diagnose, treat, cure, or prevent any disease or medical condition. Always consult a qualified healthcare provider before beginning any new wellness, hydrotherapy, or cold/heat exposure routine.