HRV setting in winter

[eayeg]

Sbould I run my HRV during very cold days /nights with temps ranging from -25 degrees and lower?
Normally I do 20min ventilate and 40min circulate 20/40 on my lifebreath hrv but I'm a bit worried that my hrv will freeze if I keep the same setting.

Could you pls suggest the correct settings for really cold winter.