For those who sauna bathe alone, or with one other — or for those who have limited space, the diminutive Hallmark IS440, 4’ x 4’ two-person sauna just might be the best value in the market today. The IS440 comes complete, from the factory, with a “Two-in-One InfraSauna Dual Heating System” comprised of Finnleo’s Low EMR/EF Infrared heating panels as well as a stainless steel traditional sauna heater. Simply assemble and plug into a 120-volt household outlet.