The prices listed for the furnaces below represent prices for an average house with average needs, which is an 80,000 BTU furnace with a 3-Ton blower that is installed in a first floor utility room of a 1600-2000 square foot house.
Situational irony is when people expect one thing to happen and then the opposite occurs, like a song about irony containing no examples of irony. Finally, dramatic irony is when only the audience or reader knows about the ironic situation taking place in a play or story, resulting in tension or humor.
1 Dramatic Irony in an Advertisement.  2  Dramatic irony is a form whereby the reader or viewer knows something that one or more of the depicted people do not know. 3  A British ad for the Nissan Micra published in a woman's magazine made effective use of irony.