IRIS 1
Bluesio's flagship 48 MW IT facility in Most, Czech Republic — a three-storey, twelve-hall campus engineered for hybrid air and direct liquid cooling at hyperscale density.
Overview
A campus built for phased hyperscale delivery
The IRIS 1 campus sits on a 50,225 sqm plot across two adjoining sites: the Main Plot, housing the data centre and office buildings, and the Generators Yard, dedicated to incoming power and emergency generation. The production building rises three storeys, each carrying four data halls, with a rooftop cooling plant above and a six-storey office building connected via an entrance gallery.
Power provision runs as a dedicated package aligned to the site's build programme: an 80 MW / 35 kV medium-voltage supply from CEZ/SEVEN, sized to bring the full 48 MW IT campus online in step with tenant demand rather than a single fixed delivery date.
Gross Site Area
Max Development Floor Area
MW
Incoming Grid Feed (35 kV)
IT Load per m² of Land
Data Centers
KONNECT Modular High-Density Data Centers
A next-generation modular infrastructure platform by Bluesio Technologies, engineered for 5MW to 8MW+ enterprise and hyperscale IT workloads. Purpose-built for AI and HPC compute clusters requiring rapid deployment, operational simplicity, and extreme resilience.
Architecture
Power Architecture
The electrical system steps down from a 35 kV incoming feed through 11 kV to 0.4/0.23 kV, guaranteeing N+1 redundancy across both IT and mechanical loads. Generator power plants operate at 11 kV in N+1 configuration, feeding 11 kV rings to their corresponding transformers, with low-voltage distribution run in a four-to-make-three (4M3) topology.
Each 4M3 system carries four independent 3.5 MVA power modules with 2.25 MW of UPS capacity, backed by VRLA batteries rated for five minutes of autonomy — enough to bridge to generator start, with 48 hours of on-site diesel storage behind that. IT loads are supplied in A/B redundancy across two independent supply systems, with air-conditioning loads distributed across the same eight power paths, isolating any single fault from affecting neighbouring systems or the data halls.
01
N+1 Redundant Distribution
11 kV generator rings and transformer rings both run N+1; LV distribution follows a 4-to-make-3 (4M3) topology.
02
A/B Load Supply
IT and mechanical loads supplied via two independent A/B systems per area, with no cross-system fault propagation.
03
35 kV Grid Supply
Dedicated incoming feed from CEZ/SEVEN, up to 80 MW, stepping down through 11 kV to 0.4/0.23 kV.
04
5-Minute UPS Autonomy
Static UPS (2×1,125 kVA per module) on VRLA batteries, bridging to generator start.
05
48-Hour Fuel Storage
12 × 80,000 l underground diesel tanks in the Generators Yard, sized for 48 hours of full-load runtime.
06
73.4 MVA Design Load
Preliminary maximum campus power demand at 0.96 capacitive power factor, full load.
Philosophy
Modular by design, flexible by tenant
Each of the four 12 MW IT blocks corresponds to three stacked data halls, one above the other — mechanical and electrical distribution is engineered around this 12 MW modularity. How power is split across those three halls is a tenant decision, and it directly shapes rack density, busbar strategy, and cooling distribution. Three reference scenarios illustrate the range:
Balanced
4–4–4 MW
Mixed density
6–3–3 MW
HPC-weighted
8–2–2 MW
HPC racks typically require 80–90% direct liquid cooling coverage, depending on vendor hardware.
Mechanical
Cooling Strategy
Cooling runs on two independent water loops — chilled water for air cooling (AC) and a dedicated direct liquid cooling (DLC) loop — giving tenants a flexible split between conventional air-cooled racks and high-density GPU deployments. The AC loop cools data hall air through fanwall units; the DLC loop removes heat directly from the CPU/GPU die, designed against the Nvidia GB200's 35°C supply-temperature requirement — the most demanding spec in the market at time of design.
Twin DN350 rooftop rings feed twelve free-cooling chillers (N+2 redundant) supplying up to ten fanwall units per data hall and two CRAH units per electrical room on the AC side. On the DLC side, seven N+2 dry cooler units and seven water pumps feed up to eight CDUs per data hall, with seven heat exchangers bridging the two loops so chiller capacity can support DLC when ambient conditions push dry coolers past their limit.
Market Overspill Solution
Location
Most, Czechia
To German Border
20 km
To Prague
85 km
Target Markets
Frankfurt & Leipzig overflow
Demand-Linked Growth
Deployment Model
Demand-linked activation
Trigger
Phased by tenant commitment
Speculative Risk
Eliminated
Carrying Costs
Zero speculative exposure
Ultra-Low Latency Topology
Max Latency
Sub-5 ms to major IXPs
To Prague
1.3 ms
To Leipzig
1.8 ms
To Frankfurt
4.2 ms
Suppression
Fire Detection & Suppression
IRIS 1 uses a hybrid low-pressure water mist (LPWM) system as the primary building protection measure across the critical infrastructure — data halls, MMR rooms, UPS rooms, and battery rooms — with sprinkler protection reserved for the production building lobby given its longer evacuation routes. High-sensitivity smoke detection (HSSD) is deployed within data halls and CRAH spaces using chilled water.
Data Halls, MMR & UPS Rooms
Low-pressure water mist, with HSSD early-warning smoke detection.
Technical Spaces
Water mist space provision across switch rooms, generator rooms, fuel storage and technical corridors.
Loading, Storage & Office Areas
Water mist space provision throughout, plus portable extinguishers per local sector regulation.
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