By PVC pipe for the frame rectangle size 1 * 1.1 * 1 m, then use the plastic bags, covers and cover kits by air conditioning systems will assume as a heat pump.
This will be a PVC pipe into a rectangular frame 1 * 1 * 1.1 m. And plastic bags and to cover the trial system is assumed to be conditioned by the heat pump.
By the PVC pipe into square project 1 * * University 1.1 1 and use plastic bag covered the family air conditioning system by experiment will assume a heat pump.