I'm heating a 24x18 two story hewn cabin with a small no frills wood stove...door with glass...not a potbelly. It does an okay job but goes through wood pretty quickly. I've been told by a friend of mine that it's a must to get a dampener for efficiency. Are there any dangers to these? I don't know much about them. Also, he was talking about a blower too. Any brand names or other info I should look for? My stove has a heat type shield on the back that I thin was made for a blower? Do most of you use these two add ons?