Hotels, shops, offices and other service-sector buildings use energy across several systems with different schedules and loads. Heating, cooling, ventilation, lighting, refrigeration, hot water and controls can each offer savings. A useful CAE assessment separates these end uses, identifies an eligible baseline and prevents overlapping claims. The commercial setting also requires good coordination between the property owner, tenant, operator and party paying for the improvement.
Map energy uses and responsibilities
Create an asset list by building, area and service. Record who owns each system, who pays the energy bill and who is commissioning the work. In a leased office or retail unit, the landlord may own the HVAC plant while the tenant replaces lighting. In a hotel, an operator may control schedules without owning the property.
These distinctions affect access to records and ownership of the savings. Resolve them in writing before assigning rights. The agreement should identify the installations and avoid conflicts with lease provisions, energy-service contracts or prior assignments made by another participant.
Match actions to catalogue measures
Potential tertiary measures may cover lighting, thermal systems, refrigeration, controls, ventilation or other equipment. Useful catalogue references include TER010, TER020, TER030, TER040, TER050, TER060, TER070, TER100 and TER220. Always verify the title, scope and current requirements of the chosen sheet rather than inferring eligibility from the code.
Mixed-use buildings need careful classification. A measure applied to a retail unit, office floors and residential apartments may require separate calculations or evidence. Classify each area by its actual use and the applicable methodology, then reconcile the result with the equipment and invoices.
Handle operating conditions carefully
Tertiary buildings can have seasonal occupancy, changing opening hours and variable service levels. These conditions may affect a singular baseline or the inputs permitted by a standardised sheet. Keep occupancy records, schedules, setpoints and consumption data where they are relevant, but do not substitute operational estimates for prescribed catalogue values.
A hotel renovation carried out during closure, or an office project completed while floors are vacant, deserves particular attention. The savings calculation must follow the applicable rules and should not claim normal-operation savings from unsupported assumptions. Explain exceptional periods and retain the source data used.
Prepare implementation evidence
Before work, photograph representative spaces, plant configuration, equipment labels and controls. Save lighting counts, refrigeration inventories, air-handling details and building-management-system exports where relevant. After work, capture the same views, final labels, installed quantities and commissioning settings.
Checklist for handover: itemised invoices; proof of payment; technical sheets; equipment and serial-number register; installation and commissioning certificates; before-and-after photographs; disposal records if required; calculation workbook; and signed CAE agreement or private energy-savings transfer documents. Assign an owner to every item and audit the package before the contractor leaves.
Assess the claim conservatively
Separate savings caused by new equipment from savings caused by reduced opening hours, lower occupancy or changes in service. Where several measures interact, document calculation order and avoid counting the same load reduction twice. A controls project and a chiller replacement, for example, may influence the same cooling consumption.
Treat early values as estimates. Final recognition may change after technical review, evidence checks or verification. Commercial agreements should explain that possibility and should not promise a universal certificate value, approval date or guaranteed outcome.