As long as the oven can provide the thermal profile you need, I don't think size matters. Just check all areas of the board for adequate temperature. Sticking a large cold mass into a small oven will drag the profile down, and the oven may take a longer time to compensate for this than it would for a relatively smaller mass. If you have a large volume of work, a larger oven might be justifiable in terms of having a larger "heat pool" that won't be dragged down so much by relatively smaller boards. It will be more stable thermally speaking and will probably recover its temperature more quickly than a small oven. My hypothetical 2 cents. Peter Duncan Dave Snyder <[log in to unmask] To: [log in to unmask] COM> cc: (bcc: DUNCAN Peter/Asst Prin Engr/ST Sent by: Aero/ST Group) TechNet Subject: [TN] Reflow Oven Sizes <[log in to unmask] ORG> 11/06/01 01:04 AM Please respond to "TechNet E-Mail Forum." What advantages does a larger reflow oven have over a smaller one other than size? We have a small unit that will fit a 10" wide board. We would like a unit that would fit a 13" wide board. Is there any other justifications to a larger oven? We do not use lead free. Thanks Dave Snyder --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 --------------------------------------------------------------------------------- [This e-mail is confidential and may also be privileged. If you are not the intended recipient, please delete it and notify us immediately; you should not copy or use it for any purpose, nor disclose its contents to any other person. Thank you.] --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------