This is done through the air vent valve of the TR.
https://butaneindustrial.com/wp-content/uploads/2016/04/Butane-Logo1-300x185.png00SaTajdarihttps://butaneindustrial.com/wp-content/uploads/2016/04/Butane-Logo1-300x185.pngSaTajdari2022-08-28 09:25:152022-08-29 05:17:50Does the TR need to be vented like the other radiators?