How many miners fit, 20ft or 40ft, air or hydro, and how much power you need. Answered with five real containers.
By Michal Beno, CEO, OneMiners5 November 2026
A 20ft mining container usually holds about 160 to 170 air-cooled Bitcoin miners. A 40ft hydro container like the Bitmain Antspace HW5 holds 210 hydro miners on 1,200 kW. Pick the size by how much power you have, not by how many boxes you want. OneMiners sells five containers today, from $25,118 to $84,000.
Our mining containers page is one of the most visited pages on oneminers.com, and the questions are always the same. How many miners fit? 20ft or 40ft? Air or hydro? How much power do I need? This guide answers each one with real products and real numbers.
5
containers in the OneMiners shop
210
hydro miners in a 40ft HW5
168
air miners in a 20ft container
1,200 kW
HW5 power capacity
What is a Bitcoin mining container?
A mining container is a shipping container turned into a small data centre. Inside are racks, power distribution, network gear and a cooling system. You put it next to a power source, connect it, load the Bitcoin miners and switch on. Containers are popular because they are fast to deploy, easy to move and easy to scale: when you want more capacity, you add another box.
Step one: start with power, not size
The most common beginner mistake is to pick a container by its size. The real limit is power. Every miner draws a fixed number of watts, and the container can only deliver so many kilowatts. Divide one by the other and you know how many miners it can run.
Miners = container power (kW) × 1,000 ÷ miner watts
Power you need = number of miners × miner watts ÷ 1,000
Leave some headroom. Real deployments keep a margin for fans, pumps, network gear and safety.
Antspace HW5 filled with Antminer S21 XP Hyd
The answer, 211, matches the 210 slots Bitmain designed the HW5 for. The container and the miner were made for each other.
20ft container with 168 Antminer S21 Pros
Before you buy a 20ft air container, make sure your site can deliver roughly 617 kW, around the clock.
20ft vs 40ft
Which size fits your site
| 20ft container | 40ft container | |
|---|---|---|
| Typical capacity | 160-170 air miners, or about 300-500 kW | 200+ hydro miners, 1 MW and up |
| Best for | First sites, smaller power connections | Large sites with a big, stable supply |
| Transport | Easier to move and place | Needs more space and heavier lifting |
| Example in our shop | OneMiners 20FT for 168 miners | Bitmain Antspace HW5 (210 hydro) |
Prices and specs from the OneMiners shop, 19 October 2026. Prices change; check the product page before you order.
Air vs hydro vs immersion
Cooling decides which miners you can run, how dense you can pack them, and how hot or cold your site can be.
Air cooling uses fans and airflow, sometimes with a water curtain. It is the simplest and cheapest, works with standard air miners, but is noisier and sensitive to dust and heat.
Hydro cooling pumps liquid through cold plates in each miner. It is quieter, packs far more power per box and suits the newest high-power models such as the S23 Hyd. The HW5 pairs this with a dry-wet cooling tower and a PUE near 1.0, meaning almost all the power goes into mining.
Immersion cooling sinks miners in a special fluid. It runs very cool and quiet, but needs immersion-ready miners and more set-up.
The five containers in our shop
BITMAIN Antspace HW5 V1
40ft · Hydro · 210 hydro miners
$84,000
MineBox 500 Express
20ft · Built-in cooling · High-density ASIC
$28,485
20FT Mining Container for 168pcs
20ft · Air (water curtain + fans) · 168 air miners
$25,118
20ft ASIC-162
20ft · Air (cold-climate) · 162 air miners
$40,878
M300 Minipod
Portable pod · Air or hydro · About 70-90 miners
$45,500
Live prices, OneMiners shop
| Container | Size / cooling | Capacity | Price | Price per kW |
|---|---|---|---|---|
| BITMAIN Antspace HW5 V1 | 40ft, Hydro | 1,200 kW | $84,000 | $70.00 |
| MineBox 500 Express | 20ft, Built-in cooling | 486 kW | $28,485 | $58.61 |
| 20FT Mining Container for 168pcs | 20ft, Air (water curtain + fans) | 168 air miners | $25,118 | — |
| 20ft ASIC-162 | 20ft, Air (cold-climate) | 162 air miners | $40,878 | — |
| M300 Minipod | Portable pod, Air or hydro | 300 kW | $45,500 | $151.67 |
Prices and specs from the OneMiners shop, 19 October 2026. Prices change; check the product page before you order. Price per kW shown only where the maker states a kW rating.
The box is the small part of the bill
A container is a big purchase, but it is usually the smallest part of a mining project. Fill an HW5 with 210 Antminer S21 XP Hyds at today's price and the miners cost $1,301,790. The container is only about 6% of the hardware bill.
Then comes electricity. A 1,200 kW container running all year uses about 10.5 million kWh. At 9.5 cents (our Czechia pay-as-you-go rate) versus 3.6 cents (Nigeria, 7-year prepaid), the difference alone is about $620,208 a year.
One year of power for a full 1,200 kW container
US dollars, running 24/7
Rates as shown on oneminers.com site pages, 19 October 2026. Prepaid tiers are 4%, 12% and 30% off the online-ordered rate, rounded down to 0.1 cent.
That is why the smartest container decision is often where it runs. You can set up a container at your own site, or ask OneMiners about hosting it at one of our locations.
Your container checklist
Five steps
Confirm your power
How many kW can your site supply, 24/7? This sets everything else.
Choose your miners
Air miners for an air container, hydro miners for a hydro container.
Do the maths
Container kW × 1,000 ÷ miner watts = how many miners fit. Leave headroom.
Check the climate
Hot and dusty sites favour hydro or immersion; cold sites may need recirculation, like the Power Mining ASIC-162.
Price the electricity
Over a container's life, power costs far more than the box. Compare sites before you choose.
kW / MW
Kilowatt / megawatt. 1 MW = 1,000 kW. A container's power rating is its most important number.
PUE
Power usage effectiveness: total power divided by mining power. 1.0 is perfect; the HW5 is near 1.0.
Hydro miner
A Bitcoin miner cooled by liquid through cold plates instead of fans.
Slots
How many miners a container is built to hold.
We sell containers from five makers and we run hosting sites with some of the lowest power prices we know of. So we will tell you honestly: the box matters, but the electricity matters more.
Quick questions
How many Bitcoin miners fit in a 20ft container?
Usually about 160-170 air miners. The OneMiners 20FT container holds 168; the Power Mining ASIC-162 holds 162.
How many fit in a 40ft container?
The Bitmain Antspace HW5 holds 210 hydro miners on 1,200 kW.
How much does a mining container cost?
In our shop, from $25,118 to $84,000 today, before miners.
Is hydro better than air?
Hydro packs more power per box and runs quieter, but needs hydro miners. Air is simpler and cheaper to start.
Can OneMiners host my container?
Ask our team. Several container listings mention OneMiners hosting as an option.
Michal Beno
CEO of OneMiners, the global Bitcoin mining hosting and hardware platform with 7-year fixed electricity contracts and a 7-year hardware warranty. He writes about the economics of industrial Bitcoin mining.
Informational only, not financial advice. Electricity rates, miner and container prices were read on oneminers.com on 19 October 2026 and can change; check the live site before you order. Examples assume a miner running 24 hours a day and are not a forecast. Bitcoin mining results depend on BTC price, network difficulty and electricity costs, which change. No return is offered or implied.
