It is not called a fan blower, it is called a fireplace radiator. Here is link to one. I have heard they are great!
https://chimneykeepers.com/fireplace_blower_heater.html
From: Budget101_@yahoogroups.com [mailto:Budget101_@yahoogroups.com] On Behalf Of M F
Sent: Sunday, December 16, 2007 9:43 PM
To: preserving-food@yahoogroups.com; [email][/email]; Budget101_@yahoogroups.com
Subject: Budget101.com : Need a fan blower for wood burning fireplace
In it we have a wood burning fireplace that we use every day. We were told that there is a fan blower that is easy to install and it keeps most of the heat in the house. Do you know anything about it.