JTEC has extensive experience in HVAC system design for both commercial and residential facilities in Jackson, Wyoming and the regional area. Principal Justin Tatosian is a licensed mechanical engineer with LEED accreditation and has been working in the HVAC industry since the turn of the century. HVAC Systems Design A properly designed HVAC system not only affects the comfort of those who will inhabit it, their health and the health of the structure. We use the latest technology and best practices to design systems that are efficient, functional, and sustainable, based on your needs.