Ethane is used in LPG (liquified petroleum gas) in varying proportions together with propane.

http://en.wikipedia.org/wiki/Liquified_petroleum_gas

LPG drives many taxis in Australia. It is liquid under pressure and ambient temperature and therefore requires a special tank which is fitted in the boot

I think propane and butane compress to a a liquid at ambient temp.

Ethane would be too high a pressure for basic domestic use. And it's a chemical feedstock, so too useful to burn??