A: My house is much too stuffy nowadays.

B: It's the hot weather.

A: I bought an air conditioner, but it doesn't help at night.

B: I heard it's bad to leave it on at night.

A: Why can't I leave it on at night?

B: It causes you to catch cold.

A: I bought a fan, but it makes too much noise.

B: Why don't you install a ceiling fan?

A: Are they quiet?

B: Yes, and inexpensive, too.

A: Is it easy to install?

B: Yes. If they weren't, they'd fall on people all the time.