New Delhi, Oct. 28 -- Temperatures are dipping fast in the northern parts of India, which means it's time to get your instant water heaters, or geysers as they are popularly called, up and running. Recently I found myself in a predicament wherein I had to replace my old geyser after fixing it several times in the past couple of years. It was only then I realised how much a low bathroom ceiling could complicate something as basic as choosing a water heater. When I started looking for a replacement, I wanted hot water on demand without making my already cramped bathroom feel even smaller. Traditional storage geysers were not ideal for the space I had, and I did not want to compromise on safety, convenience or everyday comfort just to make a...