CHANGES in outdoor weather often produce baffling changes in indoor conditions — things that never leaked before suddenly leak. Drafts develop in previously calm spaces. And for one reader, cold ...

A homeowner might be looking to improve the house’s energy efficiency by installing additional blown-in wool into an attic, for example. But caution should be taken around insulated flexible ducts so ...

Q: I inherited a concrete block building that was then converted into a home several years ago. Part of it has a crawlspace and part is on a concrete slab. The crawlspace is always damp, and the ...

Q I was reading one of your postings recently that had to do with roof venting. I have a question that you may, or may not, be able to help me with. We have a home in Raleigh, N.C., built in the 1930s ...

Question: I have a question about my air conditioner. The air handler in the attic gets a lot of mildew on the outside of the unit and around the ductwork. Mildew builds up in the drain pan and then ...

Q–I just discovered that the clothes dryer exhaust in my new home dumps into the attic near a roof vent. There is a large collection of lint in the attic. The builder claims that this is perfectly ...

With the higher-efficiency unitary systems mandated this year, many contractors have had to find ways to install larger indoor coils in tight spaces for system replacements. It was especially a ...

Q. I sure hope you have some solutions for us. We have oil hot water heat in our home. It is a 2 -story with a walkout basement and was built in 1973. What are our options for air conditioning? Two or ...