Choose between a traditional Finnish sauna heater or nine infrared wall panel heaters in the Synergy combo sauna. Infrared panels warm up quickly and aim heat directly at the bather—good for warming up specific muscles to prevent or heal injuries. The sauna heater fills the room in heat and humidity for a longer relaxation session. Both systems operate separately via digital control panels near the curved glass door. Western red cedar or European alder interiors are designed for sumptuous basking. Helo Saunas/Saunatec, 800.882.4352; www.helosaunas.com.