AdvanTech, an innovative HVAC solution for buses. Customers should look out for units that include AdvanTech, Thermo King's latest technology for HVAC buses. AdvanTech reduces the total cost of ownership by limiting downtime and allowing control over the balance of comfort and the costs associated with operation. AdvanTech units are Thermo King's most energy efficient units for the capacity they deliver, which results in a dramatic reduction in fuel consumption. It is this fuel efficiency, which makes for a substantially reduced impact on the environment, which has earned AdvanTech units their green leaf logo.