When shopping for whitegoods and appliances, the energy star ratings can be a useful guide to judge the relative energy efficiency of different makes and models. Be careful, though, because the stars can be misleading if you’re not comparing like-for-like. For example, this week we were looking at chest freezers (we want to be able … [Read more…]
What is it? The MS6115 mains power meter is a device for measuring the electrical power used by an appliance. It looks like an electronic timer switch (see photo at right). You plug it into your power point, and then plug your appliance into it to measure its power use. What does it do? You … [Read more…]
When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meager and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts, … [Read more…]