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Phantom Power - Everything plugged in uses electricity even when turned off. Unplug or include a green switch or green power strip. This will stop wasted electricity from costing you money when away or sleeping.
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Lighting - Change all your bulbs to LED (the best) or Florescent. This would reduce the electricity required to light you house at least 75%.
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Solar Thermal - Including Solar Thermal to heat you domestic hot water would reduce if not eliminate using a utility to heat the water all day.
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Solar Attic Fan - Attic fans reduce the heat build up in your attic. The hotter your attic gets the less your insulation will work.
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Solar Electric - After installation you produce your own electric for free. Just forget about it or watch the savings everyday.
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Renovate Green - If your going to remodel a room or your whole house, take the step to ensure your insulation is working the way it should. Also use green products. They are healthier for you, that's why there required in hospitals.