Step 6: Purchase and Installation of the Best Product for the Buyer 
The sixth step is the actual purchase and installation of the product.  For example, the member shopper becomes a buyer of a solar water system and the installer will put two solar hot water panels on his/her roof.  Two copper tubes are run from the roof solar collectors to the water heater appliance and a new hot water tank, which is recommended in very cold areas and sometimes doubles the capacity.  The connections are tied into the existing water heater, making the existing hot water heater a backup secondary unit.
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