I am adding a first-floor bathroom in my family room. My house is airtight, and I do not want to make any more wall penetrations than is necessary. How can I vent the new plumbing? – E.G. A.

Broken or malfunctioning air conditioners can cause severe discomfort, especially in the heat of the summer. And some repairs may not be feasible or even possible on older air conditioning units.

Expensive repairs? Find a warranty to cover future costs. Expensive repairs? Find a warranty to cover future costs. According to the U.S. Department of Energy, a leaky air duct can cost hundreds of ...