Recent study shows that using open fireplaces for house warming can decrease your life-expectancy for up to 1.6 years, due to the fine particles that are emitted in the firewood combustion.

Unsurprisingly, open fireplaces emit the most—almost 60mg per kilogram of firewood, which, in the scenarios we considered, corresponds to a decrease in life expectancy by 1 to 1.6 years," says ...