Venting rules change with efficiency — and mixing them up can lead to moisture buildup, heat exchanger damage, and dangerous combustion issues.

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 ...

Compare plans tailored to your home & budget. Faulty gas lines can cause your appliances to run improperly and can be extremely dangerous. Damaged gas lines can also cause house fires and even ...