So just an update on my BFL space heater. I mined with it for a few months just to keep my feet warm under the desk. After that few months, the horrible thing ended up springing a nice leak of the integrated cooling fluid, and try as I might, I can not figure out how to get it sealed. So now, it is just a nice relic to look at. Thats all folks. Scrap. I may sell it on ebay as parts, but it would be more to ship than it is worth or parts. The lesson- do not attempt to use a liquid cooled miner for heat. This miner was and always will be absolute rubbish.
Back off on the hashing power a bit and they last a pretty long time. You can buy the cooling system on Ebay for $25 or so, take off the old one, clean the chips carefully, screw on the new one (has compound on it) and off you go.
I'm running a pair of them to keep a room warm and they do a great job at that......