Heating, ventilation, and air conditioning, HVAC, maintenance repair operation procedure in augmented reality metaverse. This knowledge metaverse experience took less than 300 seconds to create from scratch with EON Merged-XR in a code-free environment with no Preexisting professional development experience from the creator. This is a pragmatic approach for millions of students to build the Knowledge Metaverse for learning, training & performing TODAY just using a mobile device.