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 ...

There's no problem with a one-pipe system, but the rules for venting are different. I've read dozens, maybe hundreds of high-efficiency furnace installation manuals. Every single one of them had ...

Q. With the deep winter snow we had last season, the air intake for our furnace plugged up. I had to separate the pipe from the furnace and let already-heated house air be used in the furnace rather ...