Electricity & Energy

What appliances cost to run, why a breaker keeps tripping, why the smoke alarm chirps at 3 a.m., and which electrical jobs you should never do yourself.

Energy use & costs

  • How Much Does It Cost to Run a Space Heater?

    Every plug-in heater turns electricity into heat at the same efficiency, so the only numbers that matter are its wattage, the hours it runs and what you pay per kilowatt-hour.

    3-minute read Updated

Smoke & CO alarms

  • Why Is My Smoke Detector Chirping? What Every Beep Means

    A single chirp is a maintenance message. A loud repeating pattern is an emergency. Knowing the difference, and why the chirping always seems to start at 3 a.m., saves a lot of frustration.

    3-minute read Updated

Other parts of the house