Operational
Colocation
Air cooled
Tier III

Colt London 1 Welwyn

Colt DCS · Welwyn

IT live
10 MW
Free to lease
1 MW
$ / kW·mo
$175
White space
63k ft²

Inventory

90% occupied

Power

10 MWlive

1 MW to lease · 9 MW in use

White space

63k ft²total

6,250 ft² free · 56k ft² occupied

5,806 m² · 581 m² free

Free power is unsold critical IT at this building, not utility headroom. Space is computer-room white space.

Power

IT live10 MW
Free to lease1 MW
Utility feed12.5 MW
Campus / planned10 MW

About 2.5 MW of the utility feed is cooling, conversion, and house load.

Power cost

$175/kW·mo

18.4¢ industrial · 23.9¢ after PUE 1.30

Per MW·year
$2.1M
This site · 10 MW
$21M/yr
10 kW rack
$1,746/mo
3.2¢ cheapdear 22.4¢

5.7× the cheapest market (Iceland Landsvirkjun). Same IT load there is $17M/yr less.

England industrial · utility tariff × PUE, not colo list price.

Redundancy
N+1
Opened
2011
Renewable match
80%
Rack density
10 kW
Voltage
PUE
1.301.00 ideal · 1.60 typical
Power source
UK Power Networks plus operator renewable PPAs. Dual utility feeds.

Cooling

Plant

Air / CRAH

Liquid

Not deployed

Rack density

10 kW

H100-eq

WUE

Operator has not published WUE. Blank, not zero — air-cooled sites still use some water.

Chilled-water CRAH, N+1. Liquid-ready suites offered on newer campus halls.

Network carriers

7

On-net and metro carriers typically present at this location, including internet exchanges. Not a full circuit inventory.

Clouds

5

Native regions and typical Direct Connect / ExpressRoute / Interconnect on-ramps at this campus. Availability varies by hall.

Location

Welwyn Garden City, England, United Kingdom

Welwyn Garden City, Hertfordshire

51.802°, -0.205° · Europe

Tenants / users

Enterprise, networks, cloud — Colt IQ

Notes

Colt DCS Hertfordshire hall on the IQ Network.

Operator site

Compiled from public filings, operator pages, and reporting. Not an official operator specification.