Was wondering if someone would be so kind to explain a heat pump? Does that mean that basement air can produce heat on electric? I really want to understand this basement system as we are looking at a 2007 Winnebago Adventurer to buy. The noise does is not so much a concern as we would rarely camp where a/c was needed throughout the nite. And as far as diminished storage hum well, all I can say is when we unloaded our 2007 Pace Arrow after 9 years I found "stuff" we had not seen or even knew was there? so hopefully that will not be an issue. Thanks!