Wall bracket
Wall spacers fix stainless steel chimneys at required intervals on building walls. The placement of the wall bracket is precisely calculated. Thus, the first wall bracket must be mounted directly above the T-connection of the exhaust system. All subsequent ones must be placed at a distance of four meters.
Wall brackets are available in adjustable and rigid versions as well as in various diameters. For larger diameter, it is advisable to check if static wall brackets may have to be used to guarantee safe use.
More information can be found here: