Before searching the yellow pages to look up equipment suppliers, there are a few things to consider. First, does the geographic area where the system will be installed have direct sunlight from 9:00 a.m. until 3:00 p.m. each day of the year? Or at least nearly each day of the year? This will be the amount of solar energy needed to provide adequate hot water, or home heating for that matter, for a typical family. Another connsideration is where the structure is located, such as within a homeowners association community. If so, does the association have any rules concerning solar conductors on the roof? It is best to know these things before purchasing equipment.