Rexener Hot Tubs: Discover exceptional energy efficiency with Rexener hot tubs, powered by Diesel, Biodiesel, or Red Diesel to significantly reduce your electricity costs. The advanced PR200 water heater can elevate water temperatures from +7°C to +38°C in under two hours, keeping heating costs as low as 4 euros! The Rexener PR200's fuel efficiency optimizes consumption at 2L/hour, with a smart thermostat for automatic heating regulation. Ideal for cost-effective relaxation, this is the perfect energy-saving hot tub for savvy buyers.