Here is the spec sheet we put together for the engineering people. This spec sheet only needs to have all the important info. This would not be used for a sales brochure. Our sales brochure will have more detailed info. I have one problem with this spec sheet. I asked Vivian several time to correct the picture of the fan and the dimensional drawing. I finally gave up, but you can see in the picture and the drawing the collar is on the wrong side. This could create a problem in the future. If you can fix this it would be appreciated.