It looks like Vent-a-Hood guts are installed, or at least their "Magic Lung" principle of operation is being used.

I can help you with requirements for island hoods, which you can find here repeated endlessly, but I only "tout" brands that I have owned, which is presently limited to Wolf Pro hoods. Here is one view of my Pro Island hood. This particular one is longer than you likely need because I have a Cooktek induction wok hob next to a 36-inch induction cooktop.

For requirements, search on my user name and hood.

So would this be a complete dismantle of what is existing with a replacement Wolf option?

@kaseki is there a chance you can assist me?

@updatr, that does indeed look like a VentAHood. It's not my favorite design, but it's not all that bad. It is definitely much better than a lot builder-quality models that you see these days. The large capture volume of the hood also looks really good. Somebody obviously put effort into this design; it's just showing its age at this point. How old is it? 25-35 years would be my best guess.

The thing that confuses me is the lack of a box around the spinny things. That's normally what I expect to see in a VentAHood design. Is this all you got? You usually need this box to direct airflow and to capture grease. As is, I am not convinced your hood does much (anything?).

The good thing about VentAHood-style fans is that you can spend the effort to take them all apart and clean them thoroughly, and you should have a nicely working hood again. Your hood absolutely could be refurbished.

I do agree though that a good baffle-style hood is also my personal preference. Just make sure to buy a sufficiently large model. Capture volume and area both matter; and that's doubly true for an island hood. Also, pay attention to duct diameter, length, and routing (i.e. minimize bends or down slopes). But I am sure @kaseki can fill in all the details, after you have done your homework and read some of the literally hundreds of postings that he has made in the archives.

I may be able to answer your questions, but please note: My extra-sensory perception is poor and I can't see what is in your hood chimney assembly, or what is in your ceiling, or what is on your roof, or in any rooms that might be between them. You need a contractor, or at least a broad-band carpenter/handyman, for advice on what you might have to do in your particular architecture to replace the existing hood system.

If you don't know anyone, perhaps someone at the Wolf dealer you will have to buy from can make a suggestion. Wolf dealers are usually higher-end appliance stores.

You should, on the basis of requirements we can go over here, choose (but not yet buy) a hood and a chimney cover, download the installation instructions, and have these handy for whoever you interview for the work to look at.

Also, a plan is needed for make-up air, which said contractor will have to install parts for. This is not a trivial project to do correctly, even if as much complexity as possible is avoided.

Before proceeding, review hood and MUA threads here for perspective on the many issues. I don't have time to re-explain everything, and I certainly don't have time to supervise a construction project.

As a point of specificity, while I tend to like metal I can clean where grease fumes are present, it is possible to buy from Wolf or others a so-called insert that one might call an unfinished exterior hood that is intended to be be put into a box like structure if you want to repeat above the cooktop the theme of the cabinets. I have the impression from your photos that you have a VaH insert put into some other sourced hood shell.

Question: Using the existing hood, can you sear a steak and get the plume to be fully captured and exhausted.

Also, you might want to take a look at ModernAire. That's another brand that frequently comes up in these forums. We went from a VentAHood to a ModernAire and love it. But the best part is that they build all their hoods to order. So, you have more flexibility in asking for custom dimensions. That might be something that is important in your case. But of course, that only makes sense after you know what it is you need; and as @kaseki pointed out, that requires understanding your existing conditions.

My fear was that someone was going to tell me that it could be cleaned ᾒ3ᾒ3ᾒ3ᾒ3