Last year I used a quiet version (new fans on low speed) of an S9 to heat a large bathroom in our house. It worked so well I was inspired to take it up a notch and heat the main room of our house with an S19JPro for this winter.
I've had this running for two weeks now and I'm blown away with how well it works. Our house is older and uses primarily electric baseboards for heat through the winter. This is an ideal situation to replace with a bitcoin miner, no matter what your kW/hr cost for electricity is. The biggest improvement to our house has been increased air flow. Baseboards just sit there and radiate, the miner is moving a ton of air, and our house is noticeably fresher with no window condensation.
Anyway, here's the set up and a few issues that I had to solve along the way.
Total cost to set this up was pretty much exactly $2000 CANADIAN - under $1500 USD, and you could probably do it cheaper if you're in the States, given shipping to Canada on a couple items is not exactly cheap.
S19JPro
AC Infinity 8" duct fan
Ducting
WiFi->Ethernet bridge
240v wiring set up (I had an extra one in the house already)
Filters and box
Floor register
I was able to build this set up in our basement crawl space, then duct the hot air through the floor to the main room.
Intake and filters: I used a filter box, which has 3 x 4" air intakes. One from outside for fresh air, and two return air ducts that pull from separate rooms. I did not think I would need 3 intakes, but was very surprised how much restriction there was when only using two. By the time you put filters in there as well I was having to crank the AC infinity fan quite high just to get enough air flowing.
Cutting a hole in your floor for the register - this was the one part that almost made me NOT go through with this. I did not want to cut a massive hole in my floor without knowing for sure if this would even work. In the end it was easy and looks great...and thankfully it's an awesome change in the way we heat our house.
Cost/benefit:
We've replaced two 1000 watt baseboard heaters with the S19JPro that we run at 2000 watts (~70 TH/sec) It's an equal swap as far as electricity use is concerned - but we now earn about 0.00005 BTC per day, which in my area offsets about 90% of the electric cost. Plus, like I mentioned, forced air heat is sooooo much better than radiant.
Sound: In order to keep the chips under 80*C I have to keep the fan running at speed 4 (of 10). This is pretty quiet even right beside it, but we don't hear it at all from the basement. What we do hear is the air coming out of the register. Speed 5 is just loud enough to be a bit of an annoying background noise. Something we weren't stoked on living with. 4 though, it's much quieter and not annoying, but you can definitely still hear air coming out. I think once we get to freezing temperatures outside, I might even be able to bump the fan speed down to 3. Maybe.
I'm also still running the S9 in the bathroom. Which is obviously not nearly as efficient, but it's still 'worth it' vs running the alternative wall mounted space heater.
Here's a few pics of the filter box, infinity fan, and the register on the main floor of our house.