Why host an Antminer T21 instead of running it at home
At 19.0 J/TH the T21 is the least efficient miner we host. On the client figures it is profitable at the bottom of our rate band and close to break-even at the top of it, so the hosting rate you are quoted matters more on this machine than on any other. We will tell you honestly where a T21 order lands before you ship it. If you are buying new hardware today, the S21 Pro or S23 will almost always earn more per dollar spent.
A Antminer T21 draws 3,610 W continuously. That is more than a typical household circuit will carry, it needs a dedicated 240 V feed, and it moves the heat of a space heater into the room all year. It is also loud: a current-generation air-cooled ASIC runs at roughly the noise level of a vacuum cleaner, permanently. Hosting moves all of that into a building designed for it.
Who it suits: Buyers with T21s already in hand, or anyone who can acquire them cheaply enough that the lower margin still works.
- All-inclusive $0.072–$0.089 USDT/kWh covering power, rack space, cooling, network and monitoring
- Filtered air cooling with 156 Summer/Winter Air Filtration, so dust never reaches the boards
- On-site miner repairs and part replacement — no shipping your machine away when a fan fails
- Free miner box storage, and a racking fee of $35 USD/miner one time per connection or boxing out
- A no-deposit option, and a minimum order of 5 miners
Antminer T21 specifications and hosted economics
These are the numbers we quote from. The daily profit figure is our own published estimate at $0.075 USD per kWh (miner quantity and availability based), and every other line follows from it.
Antminer T21 — hosted at our Quebec facility
| Hashrate | 190 TH/s |
|---|---|
| Power at the wall | 3,610 W (3.610 kW) |
| Efficiency | 19.0 J/TH |
| Cooling | Air-cooled — the type we host |
| Est. gross profit per miner per day | $1.19 at $0.075 USD per kWh (miner quantity and availability based) |
| Est. net profit per miner per month | $35.70 at $0.075 USD per kWh (miner quantity and availability based) |
| Break-even electricity price | about $0.089 per kWh |
| Electricity used per miner per month | 2,599 kWh |
| Your hosting cost per miner per month | $187–$231 at $0.072–$0.089 USDT/kWh |
| Our hosting rate | $0.072–$0.089 USDT/kWh, all-inclusive |
| Minimum order | 5 miners |
| Racking fee | $35 USD/miner one time per connection or boxing out |
How to read the break-even line: at about $0.089 per kWh this machine earns nothing. Below that it makes money, above it it loses money. Our rate band runs $0.072–$0.089 USDT/kWh, so the gap between your rate and $0.089 is your margin — and on this model the top of our band is close to that line, which is exactly why we quote per order rather than publishing one number.
Bitcoin price, network difficulty and pool fees all move these numbers week to week. Use the Bitcoin mining profitability calculator to re-run them at a different hashprice before you commit.
What Antminer T21 hosting costs with us
A single Antminer T21 uses about 2,599 kWh a month. At our rate band that is $187–$231 per machine per month, all-inclusive. There is no separate power bill, cooling charge, rack rental or bandwidth line: the rate you are quoted is the rate you pay.
Where you land inside the band depends on the size of your order and the space available when you book. A five-machine order and a two-hundred-machine order are not the same deal, which is why we quote rather than publish a single number. The cost per kWh page explains exactly what is inside the rate.
On top of the monthly rate there is one charge: a racking fee of $35 USD/miner one time per connection or boxing out. Miner box storage is free while you host with us.
Getting your miners to our Quebec facility
Ship your Antminer T21 units to us and we handle the rest: receiving, racking, cabling, network configuration and pool setup. Most orders are hashing within one to two business days of arrival, depending on size.
If you do not own the hardware yet, an equipment + hosting package combines the purchase and the hosting agreement in one step — the machines are delivered straight to our racks, with no shipping, customs or setup for you to arrange.
Miners already in another facility can be moved; we have taken over fleets mid-contract before. Tell us the model mix and the move date when you request a quote.
