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Diagnose and decide

Find the operational and data priorities behind high cooling energy use.

The Cooling Optimization Review examines available system, controls, schedule and performance evidence to identify practical operational actions, measurement needs and potential retrofit pathways.

When this service is useful

Use the review when the decision needs clearer evidence.

  • Cooling or HVAC accounts for a substantial share of site energy use.
  • Equipment is operating, but performance losses and control issues are not clear.
  • Schedules, set points, simultaneous heating and cooling, staging or part-load operation may be contributing to waste.
  • A facility needs to separate low-cost actions from measurement, controls or capital projects.
  • A proposed retrofit or vendor solution needs independent review before approval.
What NEI reviews

Evidence, assumptions and decision context.

  • Cooling plant, HVAC system, equipment and capacity context.
  • Operating schedules, set points and control sequences.
  • Building-management or trend data where available.
  • Indoor conditions, occupancy and operational requirements.
  • Maintenance observations, existing audits, proposals and measurement gaps.
Information requested

Start with the minimum useful evidence.

Data limitations are recorded explicitly and used to shape proportionate next steps.

  • Recent utility bills and available interval data.
  • Cooling and HVAC equipment summary.
  • Operating schedules, set-point practices and trend logs.
  • Floor area, occupancy and key space-use information.
  • Maintenance records, proposals and comfort, humidity or process constraints.
Client deliverables

Clear outputs for the next decision.

01

Operating and controls review

Assessment of schedules, set points, staging, control logic and operating patterns.

02

Opportunity ranking

Prioritized operational, controls, measurement, maintenance and capital opportunities.

03

Data and measurement plan

Minimum additional measurements or trend points needed to validate decisions.

04

Next-step action plan

A sequence covering immediate actions, targeted analysis and potential detailed work.

05

Executive briefing

A clear explanation of findings, evidence limitations, risks and priorities.

Evidence-first review

Schedules, controls and trends come before the retrofit list.

The review separates operating requirements, observable behavior and evidence gaps before ranking operational, measurement, maintenance and capital actions.

Decision questions answered

  • Is the main issue scheduling, control, maintenance, capacity, distribution, envelope interaction or measurement?
  • Which operational changes can be tested safely before capital investment?
  • Which trends and meters are required to verify the diagnosis?
  • Which retrofit options deserve more detailed engineering?

Diagnostic sequence

  1. Confirm occupied, process and weather-dependent schedules.
  2. Review setpoints, dead bands, overrides and service constraints.
  3. Inspect intended and actual control sequences.
  4. Examine trend quality, plant staging and operating events.
  5. Separate symptoms from likely root causes.
  6. Rank operational trials, measurement and capital options.

Read the cooling optimization guide →

Evidence base

The strategic importance of sustainable cooling is documented by UNEP’s Global Cooling Watch 2025. The IEA Space Cooling analysis and UNEP buildings report reinforce the need to consider equipment, buildings and operation together. NEI’s sequence above is its professional interpretation for an evidence-first review.

Engagement sequence

Five focused steps.

  1. Define the facility objective and constraints.
  2. Review plant, controls and energy evidence.
  3. Identify operating patterns, gaps and plausible causes.
  4. Rank actions by evidence, effort, risk and decision value.
  5. Deliver the review and agree the next validation step.

Scope boundary

Unless separately scoped, the review is not a detailed HVAC design, testing and balancing, commissioning, controls programming, indoor-air-quality certification, statutory compliance assessment, guaranteed-savings study or installation service.

Separate immediate operating improvements from the evidence needed for larger investments.

Start with the decision, available evidence and the outcome the organization needs.

Discuss a cooling review
Engagement at a glance

A defined decision engagement.

Scope

3-4 weeks · AED 28,000-60,000

Typical inputs

  • Utility bills and cooling energy data
  • BMS trends where available
  • Operating schedules and comfort complaints
  • Equipment lists, controls narrative and maintenance context

Decision-ready output

A prioritized measure register, operational hypotheses, verification steps, risk notes and a practical owner action plan.

Not included

  • Controls programming
  • Detailed mechanical design
  • Testing and commissioning
  • Guaranteed energy savings

Final scope and fee are confirmed after a 20-minute fit call and review of available information.

Request a fit callSee sample outputs
Fit and frequently asked questions

Use this offer when the next decision matters more than another generic report.

When is this review most useful?

When cooling cost, comfort or plant behavior is concerning but the next operational or capital action is unclear.

Is a site visit always required?

Not always. The need is decided after data and document review.

Will NEI recommend specific vendors?

The review defines performance needs and evaluation criteria; vendor selection can be separately scoped.

How are savings handled?

As evidence-based ranges with explicit assumptions and a verification plan.

Australian application

Cooling and demand review for hot-climate Australian assets.

NEI can support campuses, health facilities, public buildings and commercial portfolios where cooling schedules, controls, peak demand and distributed energy interact. The review separates operational opportunities from capital options and records climate, occupancy and data limitations.