Commercial
What cooling does a small server or comms room actually need?
3 min read · Reviewed for accuracy before publishing
A dedicated, 24/7-rated cooling unit sized to the heat load of the equipment — not a leftover office split running flat-out. IT kit fails hot, and it fails expensive: a comms room that loses cooling on a summer weekend can cook hardware before anyone's back in the building. Good small-room IT cooling means a properly sized unit rated for continuous duty, condensate handled safely away from the racks, high-temperature alerting, and a service schedule that keeps the whole arrangement boring.
Why office splits fail here
Comfort units are designed for people-hours, not 24/7 duty, and their controls assume someone will notice a problem. Run one continuously against a rack of servers and you shorten its life dramatically — then it fails on a bank holiday, silently.
Sizing is about the racks, not the room
The heat load comes from what the equipment draws, not the floor area. We calculate from the actual kit — servers, switches, UPS losses — with headroom for growth, and spec redundancy where downtime genuinely costs money.
The cheap insurance
A high-temperature alert (a text before the smoke) and a twice-yearly service cost a fraction of one dead server. If your comms room's cooling has neither, that's the first conversation to have.
“IT kit fails hot and it fails expensive — usually on a bank holiday. A duty-rated unit and a high-temperature alert cost a fraction of one dead server.”
CFM Cooling's engineers install, service and repair air conditioning and refrigeration across Essex and Suffolk. Guides are written from real jobs, not brochures — F-Gas certified (ref 1021416).