Heat-pump technology has existed for a long time, but over the past 30 years, you would've seen this term get used more and more. In a nutshell, heat pumps are a highly efficient way of moving heat ...

We recreate a real-life drain disaster - hair, shampoo and a stubborn U-bend - then see which unblockers get things flowing again. We also test... We note if an unblocker pours easily, leaves behind a ...