no, this is complete nonsense and should be dismissed as such.
People being "scared" is how north america ended up with vehicles the size of tanks. The vast majority of cold climate heat pumps work down to - 20 C in most cases and down to -30 with better models.
People being "scared" is how north america ended up with vehicles the size of tanks. The vast majority of cold climate heat pumps work down to - 20 C in most cases and down to -30 with better models.