I’m in the process of building my first darkroom space, and looking at heating options for winter months. Does anyone have experience with ceiling mounted infrared heaters? I’m wondering if the light is paper safe?
If it produces visible light, you better double check. as bdial suggests. I would suspect that it will be perfectly safe. If you use a rapid paper (less common these days) it might fog. I use a electric oil filled radiator, but that's just to take the edge off a already heated lower level room, never gets below 60F normally.