EPA U.S.A., page 6....Today, we believe there are over 29 million fireplaces, 243,000 hydronic heaters, and 12 million wood stoves nationwide. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.bioenergylists.org/pipermail/stoves_lists.bioenergylists.org/attachments/20130323/8e7deeb1/attachment.html>