Linda, thanks for the warning! We had new furnace installed just a month ago, but it utilized the old vents and chimney. However, the only reason we got a new one was because the pilot light kept going out, and Con Edison finally disconnected all gas to the furnace, and told me to get the "plenum" repaired (which was full of holes). Probably exhaust fumes had been entering the basement for quite some time. The local repair people refused to replace the "plenum", saying that it was an integral part of the furnace and this would void the Underwriters' certificate, so we opted for a complete new furnace, after 19 years. I will take the suggestion anyway and see about getting a CM Alert. Penny, NY ___________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com/getjuno.html or call Juno at (800) 654-JUNO [654-5866]