Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.
We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.
We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
I don't have a wood boiler, but Field Controls makes an oil vent damper to prevent heat from going up the flue when the oil boiler isn't firing. http://www.fieldcontrols.com/ovd.php