While it's hard to find a major change in any one area, there are numerous changes spread across the performance, handling, aero, braking and comfort envelope
that make the 650S a more focused, sharper, and a more comfortable drive than the 12C.
35 m/s), the comfort envelope
moves to the right less than the thickness of the line defining the comfort zone
A simple control strategy that will work year-round (and will change with the weather) is to open windows when outdoor conditions fall within the ASHRAE Standard 55-2010 adaptive comfort envelope
and to close windows when indoor conditions are approaching the boundaries of the comfort envelope
Most green dots (indicating comfort) are inside the comfort envelope whereas most red dots are outside.
Starting with this range, comfort envelopes are defined using the work of Nicol (2004) on air movement: when the air velocity is above 0.
Ceiling fans as extenders of the summer comfort envelope