My furnace runs pretty close to non-stop when it’s below -30 outside, I imagine a bigger concern than duty cycles if it did that when it wasn’t -30 would be tha

My furnace runs pretty close to non-stop when it’s below -30 outside, I imagine a bigger concern than duty cycles if it did that when it wasn’t -30 would be that it would still be pushing the indoor temperature to 50°C above the outdoor temp.