My current TiVo premiere is connected to a HDMI splitter. One to the main TV, one to the bedroom around the corner and one to the screen porch TV. I use the Nex Gen IR Remote Extender and extra TiVo remotes in each room with the little battery transmitter. My new Roamio will be here tomorrow. Will I be able to use the new IR remote in different rooms? Does it work through a wall?