I have 2x Xeon E5645, not making much from mining, but indeed heating is not an issue in that room

May I ask please, which coins were you mining?
Using it for storj as I have some extra storage to spare and CPU for aeon at the moment.
Have you received anything from Storj? I ran their software for half month but didnt receive anything at all.
You have to run for at least 1 full month to get paid anything, preferably 2.
The earnings are not bad, but calculating what you get paid and when is terrible...