| 摘要 |
There is provided a portable spa pool or hot tub system which includes a tub suitable for human bathing, and a water heating unit capable of burning one or more fuels. The water heating unit is situated adjacent to the tub and connected to the tub through an upper and a lower piping means, the arrangement forming a convection circulation loop. The tub is optionally circular, and when empty capable of being lifted and carried by two persons. Optionally the tub is double skinned and of a rigid plastics material with insulation between the two layers of plastic.
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