10 is shown as having sloping roof 9 although such structures can oftentimes have flat roofs and it is contemplated that virtually any roof configuration can be employed in practicing the present invention due to concerns about possible anthropogenic global warming stemming from the burning of fossil fuels solar water heating systems have been widely used adaptation of solar heating to homes and buildings is an increasingly attractive proposition considering the price volatility and international political conflicts driven by the depleting supply of easy to obtain oil a suitable solar heating system 20 is shown installed upon roof 9 preferably positioned to capture the maximum amount of solar energy by facing the solar thermal array 22 appropriately to maximize solar exposure and minimize shading from trees and adjacent structures solar array 22 can also be supported on poles and other structures unrelated to the roofs of buildings a suitable system for use herein is offered by apricus u00ae consisting of an array of evacuated heat tubes mounted in a header 23 solar radiation is absorbed by the heat tubes and converted to heat a low voltage low volume electric recirculation pump 58 which may be ac or dc powered by an attached photovoltaic panel not shown pumps the fluid into the header where it absorbs the heat as it flows through from the header outlet the fluid will travel through a non metallic fluid line a suitable product for use herein.