📐 Efficient HVAC Sizing Calculator: Air Duct Dimensions with HVACcharts Review

Slide rule, one step channel size calculator was fine except for one problem. THE BACK HAS AN INVENTORY STICKER ON THE LOWER PART WHICH IS NON-PEELABLE AND MAKES THE FORMULA UNDER THE STICKER UNREADABLE. Stickers must be used that can be removed easily and without damaging the computer.

I enjoyed using this ductor, very informative. The biggest problem is the manufacturer's sticker, it was placed above the formulas for calculations. They had to put the ductor in a plastic bag and then put a sticker on the bag to avoid this problem. Otherwise it's a great product

I have had a duct calculator for about 10 years but over time it wore out. I was hoping to get something similar to what I had and took a chance by purchasing this one. I was glad when I got it because I could read it like it was my old one. I am very happy with it. Has the same functions as my old one. 👍

There was a sticker on the back with multiple formulas that didn't peel off well. The paper it's made of doesn't look like it's going to last very long either if you plan to use it every day as an HVAC specialist and the corners were already dented shortly after shipping.