I was out for the first time in my new 80 today and I noticed that the fresh air from the vents is warm (unless I have the AC on). TO be clear it's warmer than the air outside. My guess is that the air feeding the "fresh air" intake is getting "preheated" somehow from the engine compartment. After running for 10 minutes or so it cools down ( i think). My other idea is that the control for the rad hot water doesn't shut off correctly. Anybody ever notice this ? Is it normal?