Hot tub solar heaters work very well in all parts of the U.S. â€“ anywhere that has at least 6 hours of unobstructed sun. For many hot tubs, solar heat is used as a supplemental heater to keep the spa hot during the day, and at night or during rainy periods, the other spa heater takes over.
If you intend to heat your hot tub during freezing conditions via solar then you would need a system that uses heat pipe collectors with antifreeze mixture and a heat exchanger that integrates with the existing hot tub circulation system.. The hot water rises to the top and out a port into the hot tub.
Cheap Solar Hot Tub/spa/pool Water Heater: This instructable covers the solar heater I made from parts available at the local hardware store (or salvage) for .
Solar Thermosiphoning Hot Tub Heater: UPDATE: The latest configuration works!
Some of the different ways that you might heat your hot tub.. Most people feel that the ideal temperature for a hot tub or spa is somewhere. Solar heating.
In HP104, Floridian Bob Owens describes his solar-heated hot tub, which needs help from the electric heater at times. Hot tubs are known to lose heat quickly when the jets are on, which is why many tubs are heated with a hardwired 240-volt, 50-amp dedicated circuit.
Much like seasonal swimming pools, spas and hot tubs can profit enormously from solar heating systems. This is especially true if you're installing a solar .