Natural gas is also commonly measured in imperial units, especially in reference to gas barbecues and fireplaces. A British thermal unit (Btu) is the imperial cousin of the metric joule. A Btu is the amount of energy required to raise one pound of water one degree Fahrenheit. ...
Gas light and gas fireplace lines and valves may be "live" in older homes which used natural gas to supply energy to gas fireplaces or even to gas lights. Never assume that an old gaslight fixture (photo at left) is safe and that the piping does not contain gas. Often these fixtures ...