News Research Brief: Source edition/date: 2024. Research reviewed on 2 November 2026. This is a dated explainer, not a claim of a newly announced event.
A projected saving is difficult to assess without knowing what it is compared with. Building occupancy, operating hours and existing equipment can change the result of a retrofit as much as the equipment being proposed.
Understand the Research Context
The IEA’s Energy Efficiency 2024 report analyses efficiency developments. Sector-level findings do not establish the savings or suitability of an individual retrofit proposal. Read the IEA: Energy Efficiency 2024 for the original context. The practical questions below are Best10Companies editorial analysis, not the source organization’s checklist or an endorsement.
What to Ask Before You Commit
Ask the provider to show its baseline, assumptions and measurement approach. Discuss the cost and responsibility of commissioning, controls and maintenance. The buyer needs to know whether the estimate describes technical potential, a modelled outcome or a contractual commitment. Have appropriately qualified professionals assess engineering, safety and local approval requirements before authorizing work.
| Check | Evidence to Request |
|---|---|
| Baseline | Recorded conditions and operating period |
| Assumptions | Occupancy, schedules and equipment use |
| Verification | Commissioning, measurement and maintenance scope |
A Practical Exercise
Compare two hypothetical proposals using the same building schedule and baseline period. Mark any assumption that differs before comparing their stated saving.
Build a Clearer Shortlist
Use the same brief when you compare companies offering Construction & Property services. Keep the answers, assumptions and exclusions together so that a later decision is based on comparable information. When you are ready to post your requirement, describe the scope and the evidence you need rather than requesting a general promise of results.
