Actually, the truth is that I have an Ecobee thermostat so it has some kind of built-in temperature setting option that helps save on energy consumption and costs. I did notice a significant savings from last year's bills when I did not turn the feature on. Having said that, it seems to hover in and around 19.5 degrees most of the time.
In comparison to last year's bills, I'm seeing over $30 per month of savings. Forget about the summer. It's just hot AF in Toronto.