Before the S.E.E.R. rating system was created the U.S. government used a system called E.E.R. which stands for Energy Efficiency Ratio and this standard became effective in 1975. The major problem with this equation was that it did not take into account the various seasons. Therefore in 1978 congress passed a law enforcing a standard of measurement which incorporated the seasons in its calculation. However, the S.E.E.R. (Seasonal Energy Efficiency Ratio) system used today did not become effective until sometime in the mid 1980s. However, the minimum S.E.E.R. required on an appliance has changed several times since the mid ’80s and in 2006 the standard increased to 12 S.E.E.R.
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