Let's talk about preventative measures.  I have 6 Antminers of my own in my apartment and I am always checking their temperature.  I think the general consensus seems to be to keep the miners 50 degree celsius or below.  Also, use the formula Watts= Amps x Voltage and stay below 80% of max load.  I have a fan blowing into the room and a exhaust duct blowing out of the dryer duct.  I currently have a 4" inline fan from Home Depot powering the duct but it sucks so I ordered a more powerful one on Amazon.  I may even hire an electrician to check the setup.  Glad you are okay dude.

                   

The ventilation as-is is not enough.  Right now the outside weather is cool and I have the mining room door wide open with a fan blowing in.  I'll see how things go when the more powerful inline duct fan comes in.  


edit:  I just unplugged my Antminers and will remain so until further research into safety.  Thanks for sharing your story.