I should know — my house is nearly 90 years old, and has never been retrofitted, so I have to rely on window air conditioners. That's why I've been testing a bunch of the best smart air ...

Or perhaps it's time to replace an old and inefficient central air conditioner. There are a number of options to consider, including high-efficiency systems that can reduce electrical cooling ...

Don’t make the mistake of keeping your old air conditioner long than you should. An old air conditioner will perform poorly, cost you more money in repairs and eventually become more trouble ...

Among air conditioning system options ... If the repair cost is high and your unit is old, investing in a new, energy-efficient system may be more economical in the long run.

My room temperatures don’t stay very even and my old central air conditioner is getting noisier each year. What types of new systems are more efficient and quieter?