How many does it take to change a light bulb?
Five: Three to design a nuclear-powered light bulb that never needs changing, one to install it, and one to write the computer program that controls the wall switch.
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Five: Three to design a nuclear-powered light bulb that never needs changing, one to install it, and one to write the computer program that controls the wall switch.
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Seal the gaps
Use spray foam to seal air leaks and holes around plumbing fixtures
An easy way to save energy is to seal air leaks and holes where plumbing pipes run through walls in your home.
You can also check wall-mounted cabinets for plumbing holes or air gaps in the back. Fill any holes or gaps with spray foam. Wear protective gloves and use a damp rag for cleanup.
Source: Energy Information Administration and Dept. of Energy