I believe the actual exhaust weighs about 26 lbs. out of the box. If you are trying to calculate shipping weight, you also have to include the size of the box because UPS considers it to be oversized. It's 48" x 48" x 7" and they calculate the shipping charges at 90 lbs + the extra charges for the weight. We had to set the weight at 150 pounds on our site so that the calculator would get it close to the actual charges. I hope that's not more than you wanted to know.
Ken