My reference to "modulation/oscillation" is in the context of a gas pedal maintaining a constant speed by slightly adjusting the opening and closing of the throttle on a hilly road - not slamming totally open/close as a HVAC being turned on or off. Hence the vid.
Thnx Bill
I wasn't referring to your comment, indeed didn't even see it. No, others on this forum imagine the T-stat is constantly opening and closing, since how their experience with other devices which have simple on-off control.