PORTABLE WATERING & DRAINAGE SYSTEM & COMBINED HEATING SYSTEM

摘要

The apparatus comprises a conduit which embodies three parallel ducts, an inner primary duct 1, an intermediate secondary duct 2 and an outer duct 3. The ducts 1 and 2 are perforated pipes, pipe 1 running within pipe 2 and contacting one side of the inner wall thereof, and the outer duct of a water permeable material such as cardboard, contained by a mesh 10 for stability, and filled with a porous or water permeable mineral or biological infill material 9. In use a plurality of ducts are laid end to end and side by side on a water impermeable base, the ducts 1 connected by a manifold for water supply and drainage, and the assembly covered with soil or plant growth medium. The apparatus may be used in undulating as well as flat terrain.