Will the solid wood door be deformed in the north

No, wood is a poor conductor of heat, and thermal expansion and contraction have little deformation to wood.

Wood is relatively absorbent, and changes in humidity will deform the wood.

Dry solid wood doors in the north do not deform.

Since the panels are imported, the door will definitely not be the living of a small factory, strictly speaking, the big factory will not appear too much deformation, no matter what the door will be a little deformed, but the degree is different, some of the deformation is not very obvious, and it does not affect the use. So you won't care at all.

The deformation can not be 100%, if the wooden door is dried in the processing and manufacturing process, there should be no large deformation.

If it has been dried, it will not be deformed.

Probably not. My house is being renovated, and I have walked some processing points of solid wood doors, and some doors have not been sold for a few years, but they are still very good, no cracks, no shapes, I am trying to buy two.

It can't be said that it is 100% deformed, you say that the indoor needs geothermal heating, let alone 100%, mainly depends on the moisture content of the wood and your local climate.

It seems to have a lot of uses.