Using a Node 2i in a cupboard

I'm considering buying a used Node 2i for our conservatory. In that conservatory, on top of a wooden cupboard, I have a lovely-sounding 2-unit Teac stack flanked by a pair of Q Acoustics Concept 20 speakers. There's no room up there for a Node 2i, however, so I'm wondering how the Node would do inside the cupboard. My guess is that heat won't be an issue since there's plenty of space and there's no valves or class A circuitry involved, but will wood affect the wifi signal? FYI, I'm sat within two feet of the cupboard and the wifi signal on my iPad is at maximum strength.