Image results: trane thermostat manual
Wikipedia sayings about trane thermostat manual
1.Air handler
York International brand) Lennox International Rheem (also makes Ruud) Trane HVAC Thermal comfort Indoor air quality 2008 ASHRAE handbook : heating,
https://en.wikipedia.org/wiki/Air handler
2.Building automation
electrical in the building. Old HVAC control systems, such as 24 V DC wired thermostats or pneumatic controls, are a form of automation but lack the modern systems