Should PVC schedule 40 pipe and fittings continue to be permitted for combustion exhaust venting? You and I have come across PVC that has gone from white to many colored shades: from light yellow to ...

Bob is a service technician who is well trained and nationally certified. However, he has sometimes suffered from the same confusion that all technicians occasionally do — the facts that he gathers ...

Question: Hi. We’ve just renovated a ‘50s bungalow and have two 10-year-old gas furnaces venting through a chimney, even though there is no steel ductwork. I would like to replace the chimney with ...