Can you really save £300 a year with a wood burning stove?

http://uk.finance.yahoo.com/news/really-save-300-wood-burning-070041200.html

This news commentary caught my eyes.  In short, you can always save money using alternatively methods, but you save roughly the amount you contribute in labour.

£300 is hardly enough to hire a servant to bring in the woods, light your fire, sweep the chimney and take out the ash.