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 Which is more energy efficient: on-demand or a storage water heater?

Answer On One Hand: Conventional Heaters Can Be ImprovedThe energy efficiency of conventional water heaters improves with the installation of blanket insulation to the outside of the storage tank and by s... Read More »
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Which is more energy efficient lcd or led tv?

LED back lit TV's, are more energy efficient than other LCD TVs, that use CCFL (Cold Cathode Fluorescent Lamp) technology for the back lighting.
http://wiki.answers.com/Q/Which_is_more_energy_efficient_lcd_or_led_tv

Are box fans energy efficient?

On One Hand: They're More Efficient than Air ConditionersMost box fans or floor fans use approximately 100 watts, which adds up to 74 kilowatt hours per month if they're left running around the clo... Read More »
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How energy efficient is an oven?

You can't match an air handler to an air handler. I assume you meant a 3.5 Ton A/H to a 4 Ton condenser. The answer is no. If the A/H was 4 Ton & you had a 3.5 Ton condenser you could with an expan... Read More »
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Are energy efficient windows better?

On One Hand: Energy-Efficient Windows Cost More Up FrontEnergy-efficient windows are built to exacting standards, including features like double panes of glass, argon fillings and reinforced frames... Read More »
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