Maybe? I mean, there are a lot of factors that go into sentencing including intent and harm. In this case, the HVAC system was already compromised and the guy seems to have done nothing particularly malicious with it.

It doesn't seem like it was in the state's interest to lock this person up for 10 years. Two years would have been plenty to get the point across, for a fraction of the cost, plus the potential generational damage caused by a kid growing up fatherless in the formative 2-12 years.