Topic: What's stopping companies making an actual space heater bitcoin miner for home? (Read 496 times)

Yeah they were scams, probably a bad idea to post links to them ...

there is also this:
https://bitcoinminingheater.com/
and
https://heatbit.com/ (apparently no one received one yet)

but there's very little info on youtube, which is a shame.

Wouldn't it just be easier to run a quiet miner that does 9TH without hacking it?
As I've posted many times over the years, the old Avalon miners work fine for this.
I currently use an A851 as my lounge room heater running 24/7 ~900W of flowing warm air.
Yeah it's not silent, but at 50dB at 1ft and 40dB at 2ft it's not loud either and has zero high pitch squealing.

That's why personally I do my GPU mining with Nicehash where it's basically mining BTC.  I don't think it's the greatest idea to hold shitcoins for any meaningful period of time, especially as a Bitcoin enthusiast, but mining them to get paid immediately in Bitcoin seems like it's good for the ecosystem.  It puts a constant sell pressure on alts while putting constant buy pressure on Bitcoin, it removes BTC from circulation without inflating the mining difficulty, and it keeps support away from the mostly monopolized asic mining industry.  Every home with a computer and a need for heat should be GPU mining alts to swap for BTC...

They had two topics here, here is the guy that was at least involved in the project if not the owner itself, probably the project died because of the lack of actual interest outside the hardcore mining fans community, long before the conflict started, you might blame it more on covid than the war.

The timing wasn't that good either, history shows me a revenue per TH of around 20 cents, that thing would have made you $1.6 cents running all day (impossible) while costing upfront 1000$. Guess the home market didn't help either, in eastern Europe gas heating is way cheaper than electricity.


People who count their pennies when looking at the heating bill will not be the ones able to throw 1k at a heater upfront despite knowing on the long run they will spend less than with the traditional $100 ceramic heater bought at home depot.
This is the main marketing problem for stuff like this, everyone will agree yeah, it covers your costs in years but the entry price is just a turn-off, and this happens with every product on the market, people will rather buy an inefficient air conditioner that offers 1/5 in warranty time than paying double on a much better product that will bridge the overall costs in a few years.

 

Well… looks like someone else took this to the drawing board a few years back.

https://hotmine.io/en/catalog/18

Have to say… being an aesthetics guy, I’m very impressed with the product design, fit & finish, and appreciate the attention to detail in these designs! Can’t understand the videos nor any review videos but being that they’re hand assembled in Ukraine, probably out of production until the conflict cools off.

That's me! Yeah I initially bought myself 2 S9 SE's and 2 Bitmain APW3's - but this presented a host of problems for heat/noise and electricity (limited amount of outlets and breaker combo possibilities that left enough headroom for me to do my normal day to day stuff in a not-so-huge apartment). Two weeks later I stumbled across Futurebit's site. NO CONTEST for home-use viability - the Apollo's are awesome - truly "set it and forget it" which for the use of a heater is crucial. Tuning the Apollo is very straight-forward and could absolutely be done using a raspberry pi zero 2 for a controller and some sort of switch bank or a rotary dial type of input device (like the ones I service on a daily basis in automotive applications). One would just basically write the text files to be executed in the terminal. After the initial setup a display wouldn't be necessary. I have to agree though - difficult thing with all of this is still marketability. I think this is the type of thing that a mining enthusiast or a crypto enthusiast in general would probably like to have - but the price would have to be "just right".

I look at it as not making money but spending less money.
Due to only having 1 zone for heat where I live, it's either heat the entire place or use a space / area / room whatever you want to call it heater to keep the bedroom a bit warmer during the night. There are many time that only 1 area needs it. Even at my parents old house that had multiple zones many times they were still larger then needed.
So a couple of ugly old miners tuned for noise instead of speed does work quite well.

Except for the ugly part. I kind of made it work with a few old tower cases and a couple of 1 board S9 units. But their appearance is marginal at best and would probably fit in a lot of aesthetics of homes. So something made to do the job would probably be good if you could keep the cost down. Add the possibility of replaceable hash boards for future upgrades and you could probably move a lot of units.

IF you could keep the cost down.

A cheap room heater that just burns electric can be had for under $50. Make it a better looking one and you are at $99 give or take. And the really nice ones can be a couple of hundred. If you could make one that sells for $500 but makes you $10 a month in BTC it's going to be a hard sell. $400 cost and $20 a month, that is a much easier sell. Obviously as difficulty rises that $20 goes down. But, to start, at least for the 1st winter it takes some of the sting out of the initial cost. Assuming you are running it 1/3 the day every day of the month you are looking at about 17 TH/s at today's price and difficulty for $20 a month.

-Dave

Another problem with GPU mining is probably more philosophical. How many GPU coins are some form of pump/dump scam rather than something viable as a means of economic exchange?



Adjusting heat levels with a tuning routine that optimized voltage and frequency against a measured power draw would be pretty easy. Could even have a physical dial that sets the level, indirectly, by setting the tuning routine's target.

I mean, it's more accurate to call those things room heaters rather than space heaters, the heat is concentrated mainly in a single room, and the central heating system is not easy to access or connect some heat source to, so the best you're going to get is an expensive substitute for a wall heater.

Now imagine for a second if you could mount these things to a wall. Kind of how like TVs can be mounted.

So you'd attach a single miner in each room you want to heat, but then you'd have to optimize the cost (at the expense of hashrate) to bring it down closer to the cost of a standard heater.

For control over the temperature, just change the miner frequencies through a web control panel

Quoting for photos to show up here.

Hey, I recognized this place from the other thread!, you have compac fs as well 

The Apollos and the Compac Fs are the best home miners at the moment, not sure which one would make a better heater though 

This is ironic.... I, more or less, had this same thought! My gas bill triples in the winter months (New England) so I decided to get two birds stoned at once.

Can't post pictures - but you can take a look at my Apollo setup here! https://imgur.com/a/PpSKJ0i

 I put it next to my gaming setup so I don't need to run up my gas bill in the winter. I have 4 120mm fans mounted to the rear of the "kitchen shelves" I set them up on and when it's really cold during the winter, I crank them up and it keeps me nice n' toasty!

Ya in that case you are 100% correct, the only issue would be the size and the cost of the miner, which I believe could be worse than the noise issue, I think sidehacks  sums it up pretty nicely by saying


I would imagine that in a college dorm power will be both free and limited, thus utilizing every bit of free energy would be a wise move, I mean 3th of Sha256 makes only dust, besides it won't be so cheap to buy, and the ROI will be instantly high, 35 cents a day isn't worth it, that person could save for a good GPU.

Most modern GPUs make over a dollar a day, they can use those GPUs for gaming, study, and design, even when they leave college, the GPU will still be somehow usable, I mean an RX 470 bought 7 years back can still run some solid games, do a bit of rendering, sell for somehow a good price, there are many people that would still use and buy that card, but not so many people who would buy an antminer S5 as far as I know.


I am not saying that having an ASIC miner run as a space heater is the worst idea in the world, but it only makes sense if you mod your own gear as phill does, I mean imagine you have an S9 with 1 or 2 dead hash boards, selling it for $100 will mean listing on eBay, shipping, dealing with all kind of annoying buyers/scammers, maybe even some tax-related matter, you don't have time for all that, mod the gear, make it run quiet, turn it on in the winter to make some sats, a brilliant idea.

That VS, paying $2000 for a good-looking factory-made quiet miner that makes you 50 cents a day, not so brilliant idea.

Well in a college dorm a one board s9 set to 3th would run for free. And is very cheap to do.

burns 270- 300 watts and since a dorm is basically free power  why not?

I think the problem for me would be what do you do with your space heater once it becomes worthless for mining?  With graphics cards you have a strong market of computer users and gamers that will buy pretty much any GPU you can find, so there's always another angle at resale.  I doubt you'd be able to find someone willing to pay for a subpar space heater that doubles as a non-profitable mining device.  

So to answer your question I would say that competition from GPUs is a good reason why a Bitcoin mining space heater would never work.  It would be a very small use case for someone who would want one of them.  Maybe people with free electricity that live somewhere cold and don't own a computer?  I'm guessing that's a pretty limited market for a Bitcoin space heater miner (what Bitcoiner doesn't own a computer?).

you can run three one board s9s in three rooms. clock them to 3 th each use 1 fan per machine with brains.

you would have three heaters using 270 watts. or 810 x 24 = say 20 kwatts . they are quiet.

so in the winter my 14 cent power and the benefit of the heat means they cost me 2 bucks a day . and earn 9 x 12 = 1.08 net loss of
92 cents. but if you need the space heaters and were running 3 space heaters on low you power cost is zero.

If I had more time and energy I would look into running a one board s15 or a one board s17.

I mostly do gpus in the house as gpus earn more $$ per watt and can be quiet.

Yeah, this is what I was aiming at, in my opinion, a "miningheater" would definitely not look like a miner and far more likely as a radiant panel.

Rather than trying to cram all of it into some small box that will make a lot of noise you could simply go for wall placements
I know hotmine tried something like this:
https://bitcointalksearch.org/topic/quiet-36-db-8-ths500-w-hotmine-convector-miner-product-overview-5152874
from what I understand it was completely passive even at 700w.

Large heatsinks, as you said, designed and placed perfectly so that they would release heat on the exterior, not on others, the ability to replace those chips when they get highly inefficient, capacity of turning it to different levels of heat generation as nobody wants a constant 2000W blowing on their wall,  and far more important in my view, lower initial cost, which as we speak probably are impossible to realize, I don't think anyone would sell you chips that they can put in a miner and sell for $7000 at a price that would be at under the normal heating bill for 5 years.


I just wonder, has anyone tried to approximate the cost of a complete passive miner, or if it would be possible at all?

Yep, exactly. The issue isn't total amount of heat but heat density. It's going to take a particular volume flow of air to clear a certain amount of heat from the unit, so if you increase the volume of the unit you decrease the linear flow rate of the required volume of air. Slower air means slower fans means quieter fans.

Another component of this is reducing the length of the flow path, as the exhaust end will be cooled with air already warmed by every heat source between it and the inlet. The S7 and S9 had trouble with roasting boards due to a 9" flow path. Spondoolies rack gear was even worse, with about 30" flow paths. With the S15 and onward, Bitmain shifted to short wide paths over long narrow paths, more like 6 inches, and with larger heatsinks in the hotter regions to increase the rate of thermal conduction into already hot air. The R4, specifically designed for quiet operation, had an airflow path of about two inches.

Resistive electric space heaters tend to be small because the heat-generating materials (usually basically a length of wire) are able to operate at extremely high temperatures, so the heat density of the machine is allowed to be very high. A fairly quiet fan can still do the job with heating because any air moving through will gain a substantial amount of heat, given that the goal is to pull *some* heat out of the element, not try to keep it operating below a semiconductor-survivable temperature.

Bitcoin miners generating the same amount of heat as a consumer space heater will need enough airflow to keep the chips operating at least below 100C. Ideally, even lower, as with CMOS technology there's a positive temperature coefficient for power use: as temperature increases, the power required to maintain a particular switching speed also increases. So even for a given voltage setpoint and target hashrate, as a miner heats up, it'll draw more power, causing it to heat up further, until an equilibrium is reached or failure occurs. In order to maximize profitability, the chips should be kept as cool as possible to optimize hashes per unit power.

The best way to optimize hashes per unit power is to operate the chip at a minimum stable setpoint - low volt, low speed. But this means low hashrate, and low power, per chip. In order to meet hashrate specs, or heat generation specs, it's required to use a whole mess of chips. This helps retain low density and therefore quiet airflow, but it also means a very high initial cost and a larger device that may not be trivial to unobtrusively integrate into a room.

So the design of the device will be a trade-off between the lowest initial cost (fewest chips) versus the highest operating profit (highest efficiency), coupled with convenience (lowest physical volume) versus comfort (quietest airflow). That's a lot of factors to try and optimize simultaneously.

Of course, if you push 1000w in any kind of system you will get the same amount of heat but I had the impression that when it comes to heat generation and transfer you could play with sizes, having chips further part larger heatsinks and more boards, rather than concentrating the heat source you could spread it out wider, so instead of a 15x15x35 miner you could go for the size of an air convertor, overall the same hashrate, the same heat transfer but done over a larger area, thus the reducing airspeed needed and the noise.
100x10W sources would be the same as 10x100W but spread over a 1x1m wall heater they would be easier to cool with normal speed fans.

I am very happy to be moving to a region with 9-10 cent residential power and 5-6 cent commercial power in one month, instead of the insane 18 cent residential/11 cent commercial rates here. The only problem with summer mining is the heat, since every single day is a 90+ degree day over there. 100 degree days happen 2-3 times a month, which is when I would have to shut down.

That's why I will wait until the fall to expand, especially because of PoS. I will only buy video cards after PoS happens.