I have a two zone older natural gas boiler system. All rooms in the house get heat. One room on the second floor gets hotter than all others. Almost like all the heat is going to that room I don’t know why ? I do get a lot of noise from the boiler as well, lots of gurgling noises and pipes clanging. I recently replaced my hot water tank. I am thinking there is air in the lines but am not sure how to release that.