ANALYZING TWO FEDERAL BUILDING INTEGRATED …

Water-heating electric energy use for houses with solar increased from 1.9 kWh/day in 1998/99 to 2.5 kWh/day in 2002, a difference that could be attributed to a degradation in solar system performance, but may also result from the sample size (the 1.9 kWh/day is the average of only nine houses, 2.5 kWh/day is the average of 21 houses). Figure 1. ................
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