How to install the boiler on a wall in a frame house, where the filler is mineral wool, and decoration – wooden lining or drywall? Mount the wall boiler in the same way as radiators. That is, if we take a frame house, here are our vertical racks. And in the place where we will have a fixing plate, with a boiler there is a fixing plate on the walls, or holes where screws or dowels should be screwed in, here in that place you put a wooden beam. Then sheathe and a wooden lining, as you have. Lay mineral wool with a wooden lining. And then you hang the wall boiler. But this is one option. If you have it all ready and wired, of course, you will not disassemble in order to insert this bar. I sometimes used a slightly different option. Let’s take a look at it. In almost every city there are shops where fasteners are sold, various hardware, and there are such perforated galvanized plates. They are of different thicknesses, different sizes, lengths and widths. Usually here I take a width of about 80 millimeters and a length … This is already selected by the step of your uprights. A frame house usually goes 600 millimeters. 60 centimeters. In any case, you have your own home. You need to know how long your uprights go. And so in this way I get out of the situation. That is, regarding the uprights, here, I chose the size. Fasten through, in your case, let it be a wooden lining, through a wooden lining I fasten this plate here to the vertical bar. It is quite thick, about a half millimeter thick plate turns out. And then already, if I have the same, here, these holes for the boiler, I’m fastening the screws to the boiler directly through these holes. If they do not match, it means that the hole needed to secure the boiler is simply drilled, and the boiler is already attached to this plate itself. A very good way out, so as not to disassemble anything. This disc will do its job.