In article <39apkm$8st at mserv1.dl.ac.uk>, dudy bar-zvi <dbarzvi at bgumail.bgu.ac.il> writes: I would not make Techne thermocyclers my first choice. Expierance has shown the peltier model to be unreliable in warmer climates. They do have a "new" model which has a redesigned block and pc board that might be better. Buyer beware.