Kevin Hill – HVAC Training Video | Sanford Workshop Sept 2025

Speaker: Kevin Hill

Hey guys, what’s going on? This is Kevin from HVAC Technical Academy and I’ll be here today to talk to you guys about duck board, cutting duck work. So we’re going to be making a Plymouth for measurements that were given to me were 10 by 12. So let me show you guys how to get ready to do that.

All right, so first of all, you want to subtract three from 10 and three from 12. That’ll give you a total dimension of seven and nine. Okay.

All right. So, my first cut will be uh my 7 in mark to where 3/4 to your first cut. That way, you can have a little bit of extra lip to form back to actually make your corner cut like so. So, I will grab my Vcut um which is a red. And you want to make sure your sleds are facing forward, guys. All right. So, I’m going to measure my three and a half, 3/4, and my first cut, remember, is seven. So, that’s about three right there. You want to make sure you’re flush all the way through. And you want to travel all the way through, guys. Like so. Okay.

Remove any of this fiberglass, which is called fiberglass. And going to give you a good fold. You will feel the tension inside the fiberglass to let you know. All right, that should be good enough.

All right. Now, second cut. Nine inches, guys. So, you want to start start from the edge point like so. That’s about nine say. So, right about nine. All right. Second cut. Remember, fast forward. There you go. So far so good, huh? Again, it’s going to feel a little tension there, but that’s the whole purpose of folding it back. That way you can release some of that.

You guys remember the next cut? Remember seven and a quarter the first time, but we’re not doing seven and a quarter, just seven. So you start from your the edge of the last cut. We’re at seven. Good to go. But this time want to use the blue. This is the black. Oh, sorry. Damn. We got to do it over. All right. Yeah. I want to go with the red. Sorry. Yeah. Seven.

1. Now we want to go nine. Now we want to go line add it up. Now we’re going with the butt cut. Reason for the butt cut so you can have a little lip to fold over. It’s gonna be a little tough, but cut all this excess off right here because we don’t need any of that. This is no longer needed. And now what we want to do, we want to like so fillet the rest of this excess fiberglass off. If you guys ever filleted a fish, you would understand what I’m saying when I say fillet.

So far so good. Just want to get just take all the rest of this off, guys. Now, from there, it’s going to start forming our plenum box. Don’t forget, stretch it out again. It’s not going to  form the way you want to that perfect dimension that you guys are really looking for. Okay. So, we should be fully squared like so.

Now, more than likely you’re going to have a helper outside in the field with you. But if you but if you don’t, get you a little piece. This right here is called working by yourself. Just rip your little piece off like so.

All right. Well, you want to get this on as easily as possible. It’s way easier than that, but guys get a somewhat of an idea what’s going on. It’s right here. See these ridges in there? This is what you want to see after you assemble this product. And this is how you make a 10 by 12 plenum, but of course it have a cap on it. And this is Kevin Hill from HVAC Technical Academy. Hope you guys enjoyed this video.