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I saw a great advertisement for a product containing Teflon. What is the difference between this and First Strike? Does First Strike contain Teflon?

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No, there is no Teflon in First Strike. You may have noticed that the ads for Teflon products make the condensate form beads. This is totally unacceptable for air conditioning coils. In fact, it is the opposite from what manufacturers recommend. Air velocities through coils are limited by "blow-off", or the tendency of the condensate to be ripped off of the coil fins by the air. This water winds up down stream of the coils where it either causes propertly damage, or contributes to the dampness in the insulation, something that is not wanted. Teflon with its bead producing effects, allows the water to have a higher profile to the air stream, and become more susceptible to blow-off. For this reason, First Strike does not contain Teflon.