I presently have an Burnham oil burner equiped with a power vent. It is six years old and the power vent is becoming very noisy. I have already had to replace the boiler part of the furnace. By using a power vent instead of a Chimney, would this have anything to do with the boiler developing a leak. I fear that I will have to replace the [power vent soon. Is there a power vent on the market that is quieter and that has a longer life span than seven years? All of my installation and repair work is done by "professionals" in the field. I would appreciate any information you could give me. Thanks, Ronald B. Ames