I want to prepare our walls and get the vent tubing ready for our Viking microwave before the cupboards are installed. The microwave comes with a rectangle vent exit and I am also trying to figure out if I should vent it outside with a rectangular vent or switch to a circular tubing.
Either way, the issue is that I cannot be 100% sure of the exact position of the microwave. Is there something that I can do before the cupboards go in or do I have to wait? Any advice is greatly appreciated.