I have a Breckwell P24i inserted into a masonry fireplace with 4" pellet pipe running all the way up the chimney. I perform regular maintenance and cleaning, but having burned through over 3 tons of pellets this winter, it is time for a more thorough cleaning. Two items I am unsure about. 1) How do I remove the vertical vent pipe from the exhaust (in order to clean it out) if the installer secured the pipe with silicone high-temp sealant? There is no T-connector as in the freestanding units. 2.) How do I clean the combustion blower? I have seen postings that indicate that you need to take the blower out of the unit to clean it, but I don't see any instructions in the P24 manual for how to do this.