Myth Busters

A room will heat up at the same rate, whether the thermostat is set to 20ºC or 25ºC.

We've all heard about different ways of saving energy, but how do we know which ones are true? Take a look at our myth busters for some help:




Turning up the thermostat to well above the temperature required will heat up a room quicker


A room will heat up at the same rate, whether the thermostat is set to 20ºC or 25ºC. If the thermostat is set above the temperature required, energy will be wasted once that temperature is achieve

It’s better to leave a room at a warmer temperature than to cool a room and heat it back up



The amount of energy needed to heat a room up is almost the same as the amount saved while it’s cooling down. In fact, from the time your room stabilizes at the lower temperature until you start heating it up again, you’re saving energy

It’s better to leave fluorescent lights on rather than turning them off when you leave a room


This consumes unnecessary energy. A fluorescent tube uses over 500 times more energy if left on for 15 minutes than the energy needed to restart it.

Turning a computer on and off frequently uses more power and damages the hard drive


Modern hard drives are not significantly affected by frequent shut-downs.


Screen savers save energy


Certain graphics-intensive screen savers can cause the computer to burn twice as much energy and may prevent a computer from entering sleep mode.

Energy saving light bulbs take ages to warm up and give off dull light



Many lamps come on instantly and no lamp should come on later than a second or two after flicking the switch. The light is bright and clear, and a test conducted by the Energy Saving Trust suggests the majority of people cannot tell the difference between the light of a new CFL and an incandescent bulb.