Field notes

Bitfield Notes

Engineer laptop and tools at a server rack

Venting a small server room: get the hot air out

A single air conditioner is not ventilation. Here is the two-fan arrangement that keeps a small office server room stable, how to size it, whether you can vent into the attic, and the mistakes that quietly make it worse.

Bitfield Systems

Bitfield Systems

Operations

Sep 28, 2026 · 5 min

Your tech guide to a secure work practice

All articles

Engineer laptop and tools at a server rack

SEP 28, 2026 · 4 MIN

Venting a small server room: get the hot air out

A single air conditioner is not ventilation. Here is the two-fan arrangement that keeps a small office server room…

server room aisle with metal equipment racks

SEP 22, 2026 · 1 MIN

The backup you have never restored is a guess

A backup job that finishes is not the same as data you can get back. Here is what actually fails, and the quarterly…

Stacked case folders, a brass lamp and a laptop showing a calendar with a court filing deadline circled

SEP 8, 2026 · 4 MIN

Privilege, Deadlines and Downtime: What Law Firm IT Has to Get Right

A practice is judged by a different standard. Miss a filing deadline and you are explaining a possible malpractice…

A heavy vault door ajar, an official embossing seal and die on a plinth inside

AUG 25, 2026 · 6 MIN

The Chain of Trust: How Certificate Chains Actually Work

Everyone has clicked past a certificate warning. Almost nobody has been told what the padlock is actually asserting…

An open hand with a glowing padlock hologram and streams of binary digits floating above the palm

AUG 18, 2026 · 11 MIN

Data Safeguards: From Storage to Transit

Encrypting the disk answers one narrow question, and most of your exposure is somewhere else. What actually needs…

Somebody working late with a confidential client file open beside a laptop showing a chat interface

AUG 4, 2026 · 4 MIN

Your Staff Are Already Using AI: The Question Is What They Are Pasting Into It

Nobody told them not to, so they did. Why blocking the tools makes your exposure worse, what actually differs between…

Scroll to Top