Quick #Kindle tip: If you want to use a recent Kindle as an offline non-DRM #eBook reader, you can use it without logging into an Amazon account (or even Wifi). Just plug your USB cable in when it prompts you to connect/sign in during first-boot, copy your books over, then unplug & reboot. When it reboots, it'll drop you to the home screen with your books on it. This information was not as easy to find as I'd have hoped, but does actually work.
Heat pumps to produce energy-efficient heat. When we think of a heat pump , it is still synonymous with heating on cold winter days. Rightly so. Wasn't a heat pump designed for heating? Today this is no longer the case. Or rather: not just heating.