Thanks everyone. I'll look into this a bit more and possibly send one or two of you a PM for additional information.
Agreed. I've thought about it some more, and even if I'm "mining at a loss" (electricity is costing more than I'm earning), it's still worth it to continue running the miner because I'm heating at a profit (spending about the same amount as I would have on running an electric heater, but gaining revenue, which a normal space heeateer would never do).
Since the primary goal is heating the garage, I'm starting to think that what I want is the ASIC that draws the most amps. That will be most effective at heating the space, and at that point ANY revenue is just a bonus.
The next step here is going to be figuring out where/how to purchase the equipment and how to avoid getting scammed.
You're probably right. If it works well enough, I might even convince some friends and/or family to heat normally unheated spaces this way.
I suspect that it's going to get way too hot in that garage in the summer to run an ASIC. I'm not interested in running extra cooling just to keep the ASIC running year round. Too much effort for too little profit.
My recommendation is that you need a "heater" not necessarily BTC.
Agreed. I've thought about it some more, and even if I'm "mining at a loss" (electricity is costing more than I'm earning), it's still worth it to continue running the miner because I'm heating at a profit (spending about the same amount as I would have on running an electric heater, but gaining revenue, which a normal space heeateer would never do).
Go for a highly profitable model.
Since the primary goal is heating the garage, I'm starting to think that what I want is the ASIC that draws the most amps. That will be most effective at heating the space, and at that point ANY revenue is just a bonus.
The next step here is going to be figuring out where/how to purchase the equipment and how to avoid getting scammed.
The other thing is, once you start seeing the profits, you probably won't sell it.
You're probably right. If it works well enough, I might even convince some friends and/or family to heat normally unheated spaces this way.
Keep it running and enjoy the profits year round! 
I suspect that it's going to get way too hot in that garage in the summer to run an ASIC. I'm not interested in running extra cooling just to keep the ASIC running year round. Too much effort for too little profit.