Built-in unit Immergas omni container box universal boilerBUILT IN UNIT IMMERGAS OMNI CONTAINER BOX UNIVERSAL BOILER The OMNI CONTAINER built in frame by IMMERGAS is ideal for those who prefer or need to have their boiler or water heater built in inside or outside their home. External built in installation offers the great advantage of not taking away space from the habitable rooms as this box is installed in the cavity of the external walls. Thanks to this containment case, the boiler disappears completely