New Delhi, Dec. 30 -- Refrigerators are strange appliances. You interact with them every day, but you almost never think about them. They become part of the background. What you do notice, over time, are the workarounds. Vegetables that need to be finished quickly. Milk that doesn't quite last as long as it should. That one shelf where things freeze if you forget them. None of this feels like a failure. It just feels like life with a fridge. That's why the difference only becomes obvious when you replace one.

The feature that quietly changes that experience is an inverter compressor. Most people have lived with conventional compressors for years without realising it. They work in a very blunt way. The fridge warms up slightly, the compre...