Thank you for your question on the model 1688F finish pack. The 1688F would be just the finish kit for a 688 model. The 688 offers 50 cfm's and 4.0 sones.
If you have a 688-G or later, you could use the 690 upgrade kit. This upgrade kit would give you 60 cfm's with 3.0 sones. This will only be compatible if your housing size is 7-1/4" x 7-1/2".
If you have further questions, please give our Technical Support a call at 800-637-1453.
Date published: 2016-07-29