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.

Homeowners benefit from a basic understanding of ductwork design. When you discuss the details of their HVAC system — answering questions and addressing concerns — it reflects your credibility and ...

QUESTION: I use a rooftop air conditioner for my 2,000-square-foot home built in 1982. Two bedrooms that are right under the 10-year-old AC are often icy cold in summer while the kitchen stays warm.