A piece of regular size paper was ins...

Hi mattjules108,

If I understand correctly, this paper went down a hot air supply duct (i.e. the filter was over the outlet? - if not, correct me). If your ductwork is metal (as it is in most residential construction), it wouldn't matter if that single piece of paper caught fire (unless your ducts are so dirty that there's more fuel than just the paper there) - - if it did, it would only smoke-up your interior a little, the metal ducting should preclude a fire hazard. If you have your ducts cleaned you will probably be able to retrieve it. For that matter, a long vacuum hose inserted down the duct would likely retrieve it along with anything else down there that you don't know about from the previous occupants (kids toys, papers, whatever.

If you write back with more details, I may be able to offer more precise guidance.

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Jon