Can the NewTechWood siding product be hung vertically?
Yes, they can. Just keep in mind that you will want to use the US44 End Fascia on the bottom surface of such an installation as a type of track (see https://www.newtechwood.com/siding/#fascia). Additionally, you would want to use horizontal furring strips / joists. For breathability, you would also need breaks in the furring strips, of about 2’’ in length, every 16’’. These breaks can be in the form of perforation in the furring strips.