The heat source for these are great, its a wood burning stove that is actualy submerged in the tub. Build a fire in it and close the door and your water is hot in no time.
The heater works great with conventional pumps, filters, jets and chemicals but many of our owners prefer bathing in the age-old Japanese style… changing the water frequently. The average tub with a 450 gallon capacity heats up at the rate of 30 degrees F, or more per hour, so there’s no need to keep the water hot as in conventional systems. You also avoid the need to spend a fortune on electricity and maintenance. With a tub full of water and an armload of wood, you can enjoy a luxurious hot bath in any weather, all year around
[viaTreehugger]]