What drains faster, a vented or unvented drain? For every side-by-side test that I have ever conducted, the unvented drain is faster. This is contrary to the water-bottle analogy that so many plumbers ...

Over the years I've written several times about unvented or "vent-free" gas room heaters. My (negative) opinion about these appliances is based on the fact that the combustion by-products produced by ...

Q: We read one of your articles on ventless gas fireplaces and are concerned about the safety of the one in our home. We have a code-approved unvented gas log fireplace. It has a built-in carbon ...