This site does not really provide a great explanation of what this part is needed for, but if you are mounting the heater on the floor, this part is a must!

It was what I needed to install the furnace in the rear of my van over the rear axel thru the flooring and 1” insulation board and 5 mm Siless thermal sound deadener. The collar could have been longer to reach thru those three, so cut a 5” hole all the way thru the floor and added some 800 degree gasket maker from below. It all works beautifully

Worked well to install my Webasto air top 2000 in a Promaster van. Seems very solid, good product

Made installing my Epar heater a breeze. Instead of drilling multiple holes I just had to make one large hole with a 5 or 5.5 inch hole saw. Made it easy to run the intake and exhaust hoses right through the floor rather than trying to connect them under the van. I fastened it to the wood floor with screws and sealed underneath with 3M fire block and silicone. If I was going to do it again I’d do the same thing.

I really love the idea of this product, and used it, BUT I think it's very strange that the circular turret part is not fully welded to the base. It's only tacked down in 4 placed, which could potentially let water/debris in. So, I sealed the entire thing with gasket sealer, just as I did around the outside of the base, where it meats the hole in the vehicle floor. So, I really think it should be fully welded.

Excellent order process, rapid delivery, easy to install.

Holes weren’t perfectly lined up which was annoying but I used a dremel to enlarge them and make it work. Perfect after that. Will probably buy a second one for another heater install.

I was a little hot when I learned this was shipping from the UK. Not clearly noted in the website. But after I received it in three days all was very forgiven. And I live in Las Vegas, Nevada, USA!

I installed my espar d2 unit 3 times before I was satisfied with the results. The first two times were using the external mounting box from Heatso (I reviewed that product), and, ultimately, used this for my final install. Quite happy with this bracket as it provides a clean and simple install. You need to drill a 5in hole, which was easily accomplished with an appropriately sized bit. I cleaned up the exposed edges and put down a few coats of rust inhibitor. The bracket was the perfect depth for my 2019 sprinter floor after vinyl planks, 1/2in ply and a 1/4in minicell foam layer. Connecting the exhaust, combustion hose and fuel line is a bit tricky given the small space, but there is ample room for the brackets if you pay attention to their orientation. I used a socket wrench with adaptor for the bits and it all fit just fine. Would highly recommend this product if you're installing the D2 anywhere in your van conversion. Drilling a 5in hole seemed intimidating upfront, but easier than having to align 7 smaller holes for the simple espar floor bracket. Not to mention applying rust inhibitor is much easier for the larger opening. Save yourself some time and buy the bracket and bit and be done with it.