Btu 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 ...
Watch out: B-Vents are not for use with fireplaces, woodstoves, or oil-fired equipment. As you see in our close-up photo below, a rated or UL-listed type B-vent chimney will usually be clearly labeled. The B-vent also requires that its own special chimney cap be installed. If the ...
Plenty of homes have gas water heaters. But the great majority of them have a way to remove the exhaust gases from the combustion that happens. In the US, it’s required by code to have an exhaust vent, or flue, connected to the top of the water heater. That flue has to take the ...