Solar Sun Rings
The Solar Sun Ring is a passive solar swimming pool heating device made from two sheets of heavyweight U.V. resistant vinyl. The upper clear layer holds insulating air and focuses sunlight on the blue colored lower layer. You will really be amazed at the thickness and durability of these Solar Pool Rings. The blue layer absorbs about 50% of the sunlight and converts it to heat. The balance of the sunlight is allowed to pass through for deep water heating. Solar Sun Rings are patented, and have been independently tested to show a heat transfer of up to 21,000 BTUs. They are up to 5x thicker than standard solar blankets, and will last for years.