Hello Since I had such good luck with my Wood pellet Stove OAK, I decided to get one for the Oil FHW Boiler. OAK up my Oil Boiler! Here is a link to the instructions with good pics of the parts! http://www.fieldcontrols.com/pdfs/46273500.pdf Looks a bit tricky to install since the oil pump must be removed and Over the fire draft adjustment and CO2 testing must be done for best results. No more pulling air in from cracks in the house which I have very few of. Looks like it will be really good not to send all that heated room air up the chimney especially in cold weather. Has anyone tried this??