A sponsored opinion piece on DCD, written by Gordon Johnson, senior CFD manager at Subzero Engineering, makes a case that is easy to overlook in sustainability planning. Its argument is that the largest avoidable costs sit in routine upkeep, not in headline projects such as cooling replacements or renewable commitments.
The author contrasts two kinds of work. Capital initiatives pass through approval gates, carry an ROI case and produce measurable results. Day-to-day maintenance of an existing facility has no equivalent gate and often no clear owner, so it tends to be underfunded unless a failure forces attention. The piece says this waste can be comparable in scale to the visible kind.
It splits the problem into physical and strategic waste. Small gaps around rails, floor tiles and rack openings force cooling systems to work harder, without any equipment fault that would trigger an incident report. Idle or outdated servers keep drawing power, and fixing that requires someone to identify candidates and commit resources.
The article says a site commissioned at a PUE of 1.3 rarely holds it. It cites typical 2026 ranges of 1.6 to 2.0 for enterprise sites and 1.4 to 1.6 for modern colocation, against roughly 1.1 to 1.2 for hyperscale designs. It attributes much of the gap to accumulated drift rather than design flaws.
Other contributors it lists:
- Overprovisioned per-rack power and cooling that is never revisited, leaving real utilization at 40 to 60 percent of allocation and potentially distorting expansion decisions.
- Comatose servers that nobody formally retires after a project or migration ends.
- Deferred maintenance that looks prudent until a single outage or emergency callout outweighs the savings.
- Service and licensing contracts that auto-renew or escalate without periodic audit.
The common thread, in the author's framing, is not poor engineering but the lack of an ongoing process to catch small losses before they compound.
Why it matters: The piece is vendor-sponsored and offers no original data, and the PUE ranges and utilization figures are presented without sourcing in the excerpt available. Still, the governance point is a useful check for operators and investors: efficiency gains from capital projects may erode if no one owns routine audits of airflow, allocations, idle assets and contracts.
TwinStack automated analysis, based on reporting by DCD. Check the original for full details.