Skipping the manufacturer's instructions during installation may result in a furnace that fails within six months or less. For example, heat exchangers can crack from improper venting, and gas valves ...

A picture of an installation where two gas cylinders have been set up to work interchangeably. When the gas of the one runs out, you can switch to the other cylinder using a changeover valve. The ...

But Weimer said the proposal “won’t do much good for existing lines that lack valves and aren’t being replaced.” Customers could request the safety valves under the rule for the tens of millions of ...