B: It sure is.

A: In fact, it’s chilly in the apartment, too.

B: Let’s turn on the heat.

A: I’ll check to make sure that all the windows are shut.

B: It should be warmer in a few minutes.

A: It’s so nice to have a heated apartment.

B: How did they survive in the old days?

A: They had fireplaces.

B: Someone had to chop the wood.

A: And carry it into the house.

B: All we have to do is flip a switch.