We traveled from Frankfurt to IAD on Nov 24,2022. We had seats 20 H,J, K. These seats are very close to the exit. The seat 20 K is the worst seat I have ever sat. The seat does not recline and gets extremely cold - feels like you are sitting in a refrigerator. I complained to the air hostess about how cold this seat was. She gave me a blanket - but it did not help. My feet got swollen because of the cold (I have kidney problem). This seat should never be sold and installed at that location - but Lufthansa is very greedy and want to make money by putting this seat that close to the exit. Lufthansa please remove that seat and dont make passengers suffer. I will never travel in Lufthansa any more. Advise to economy passengers - never reserve seats close to the exit doors - they get very cold and no amount of blankets will help. Lufthansa should not sell the seats close to the exit doors - very dangerously cold.