I understand the variable blower, I have one too. But if the majority of the cost is coming from using natural gas. Are you saying the gas it takes to raise the temperature 5 degrees one time is greater than the gas used at the constant but “raised” temperature for 8 hours at night?
Or in math terms:
Gas needed to increase temp. from A to B = X
Gas needed to maintain temp. B - gas needed to maintain temp. A = Y
X>Y ???