Just seen a crowd funding application for a new device that tells you when your gas is running low. It sends a notification to your smartphone alerting you to the impending lack of Gas. This post is not meant to be an endorsement for crowd funding projects, simply a "heads-up" to Funsters of what might be a useful tool. You can see all about it Broken Link Removed. Needless to say I've supported it, I live in dread of SWMBO getting pointy nipples through lack of heater output! Cheers. Terran