The Grandview is a proper Finnish barrel sauna — no infrared panels, no app, no Bluetooth. What it does offer is an authentic 150-195F traditional experience in a beautifully crafted cedar barrel that seats up to six. At around $9K with professional installation required and a 45-minute heat-up, it is a commitment. But Almost Heaven has been building these since 1976, and the 10-year structural warranty shows they stand behind the craft.