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 c and let thooling 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 c and let thooling just to keep the ASIC running year round. Too much effort for too little profit.
Here is the thing. You don't want to go off of just "amp pull". You want to look at profit and how you want to leverage it. The other thing is, profit per amp is important, because once you get bit by the mining bug, you may want to buy another. So take watt / volt (240) = amps. Then divide the daily revenue by amps and get a $/amp ratio.
My most protifable miner right now is mid pack on the amp pull, so I actually bought another one last week. You will find your house to be amp constrained really really fast. Go for $ per amp ratio and let that be a guide for you.
You don't, just raise the garage door and put a box fan behind it. I live in Texas, the garage is 99 degrees so I flush out the heat (but I am moving to immersion cooling). You want the heater. If it gets "too hot" then just unplug it for a few months and come back!