Pat Huelman explains why a house with both a fireplace and a large cooktop exhaust... More
Q: When designing a radiant floor, can there be such a thing as too much thermal mass? Here in Alaska, we sometimes see the temperature jump from -10°F up to 40°F above in just a few hours. More
Q: We are builders in the Philadelphia area. Over the past few years, we’ve experienced several cases of what we’ve been told is "carpet filtration" — dark ghost lines that appear on the carpet under doors and around the perimeter of rooms. We tested the hvac system and found a sizeable imbalance between the supply and return sides, so we added an additional central return system to equalize the pressures. Is the imbalance the major cause of the filtration? If not, what are the causes? We have had to replace some carpet, and hope that we don’t continue to be liable for a recurring problem. More
Q: My hvac sub tells me that hot water radiant heat is "more efficient" than traditional forced hot air. Is this true? More
Q: Can a dehumidifier be added to a forced-air system? If so, what should a contractor know about specifying this? More
Q: Puzzled by conflicting energy advice? We asked our panel experts to help out by summarizing the latest thinking on a number of thorny issues. More
A look at how new systems developed in Europe can provide flexible zoning and top heating performance. More
New boilers use condensing technology, boiler purging, and power venting to boost performance. A heating engineer describes how to choose the right features for your project. More
In cold climates, a badly installed bathroom fan can be worse than none at all. Here’s how to do it right. More
Answers to the most frequent question on warm-air heating by one of the developers of forced warm-air heating. More
