Hi folks, the official AV Forums home cinema needs some 'environmental control'. On even mildly cold days, it's uncomfortably cold in there until the kit has been on a couple of hours when it starts to get quite warm. Unless it's REALLY cold outside in which case the place is really hard to heat up. What I need is a box in the loft which (perhaps via a grill in the ceiling) given half an hour, gets the room to 'snug' temperature and keeps it there irrespective of the temperature outside. And it needs to do it virtually silently. The home cinema is single garage sized, there is plenty of room in the loft, access via a reasonably sized hatch and I'm happy to have vents put in the external walls of the loft. Your recommendations are invited. Thanks.