AC Noise. And will tv antenna work on DTV in 2009?

I have a 2005 2720SL that we have had for a year. After 25 years of popups its great to have a real bath, sofa and kitchen.

THE PROBLEM! Every time we use AC the noise level is excessive. We took a TV but the AC fan noise is so loud that we couldn't hear it. Is there any solution to this??

Our TV works great with the antenna but wonder if anyone knows if it will receive the HD signal that stations are changing to in 2009?

Has anyone tried TV trays instead of the foldout tables? I would like to find a practical replacement as I find them uncomfortable to eat from.