Does anyone happen to know of a reference (table?) for the number of small (1/8" - 5/32") ventillation holes required to provide the equivalent air resistance of a larger (4-6 sq. in.) single vent? 73 & Good morning, Marv WC6W * ________________________________________________________________________ Try Juno Platinum for Free! Then, only $9.95/month! Unlimited Internet Access with 1GB of Email Storage. Visit http://www.juno.com/value to sign up today!