Hi there

Im a total newb so go easy
Im in a high rise block so i cant attach any equipment to the outside of the building.
In the room i have a G5 running and 2 powerfull 150w active speakers adding to the warmth.
there are three large north east facing windows.
I dont want to spend much money especially as i'll only be using the cooling a few weeks a year (england) and if it could also do a spot of heating in the winter that would be great. so please could u recomend me a system