Energy efficient thermosyphoning spa heater system

Claim 1

A spa comprising: (a) A spa shell having at least one continuous connected spa shell side surface and a spa bottom; (b) an air blower attached to said spa shell by means of an air pipe interconnected to an air manifold from which a plurality of bubble inlets communicate through said spa shell; (c) a thermosyphoning unit where a heating pipe with a heating element within said heating pipe is attached to said side surface of said spa shell by means of a cold inlet pipe and a hot outlet pipe located above said cold inlet pipe wherein a plane passing through said cold inlet pipe and being perpendicular to said spa bottom will not pass through said hot outlet pipe; (d) a one-speed pump circulating fluid from said spa shell by means of at least four inlets, namely, a drain, a skimmer, along with said cold inlet pipe and said hot outlet pipe of said thermosyphoning unit which communicate through said spa shell where said thermosyphoning unit, said drain by a drain pipe, and said skimmer by a skimmer pipe interconnect to said pump by means of a suction pipe and, further, where said pump provides fluid and air to a spa shell by means of a pump pipe to a plurality of water jets where an air inlet provides air to said pump pipe by means of air inlet pipe which communicates with the atmosphere through an air inlet.