Measure energy performance before promising savings
Gather dated consumption bills, occupancy, operating hours, floor area and equipment specifications to create a comparable baseline. Separate weather, vacancy and changes in use from the effect of an efficiency intervention. Estimate capital expenditure, disruption, maintenance and verified savings using explicit scenarios, not an assumed resale premium. Record who supplied each dataset, its coverage period and how the post-upgrade outcome will be measured; treat unverified certification or savings claims as open questions.
Practical verification checklist
Efficiency assessment: Establish baseline electricity, heating and water use from dated bills and occupancy data before comparing upgrades. Estimate installation cost, maintenance, realistic savings range and payback under stated tariffs; distinguish modeled savings from measured results. Verify product certifications, building compatibility and available incentives at the time of purchase.
