The Decarbonisation Options Assessment should lead to the generation of a Decarbonisation Options Assessment Report that summarises the findings of all data analysis and survey outputs.
The surveyor/assessor/auditor should prepare a Report that provides the following items of information for each decarbonisation option being assessed:
> Baseline Summary:
• Context and setting - the building(s) architectural, cultural and historic context , (where appropriate) and its physical setting, including aspect and exposure, access, planning constraints.
• Condition - the building's structural condition (as appropriate to the assessment), and its construction, services and controls, the presence of defects and the need for repairs or maintenance.
• Occupancy - the number of occupants and their pattern of use of the building, including set-points and operational limits of indoor environmental conditions (such as temperatures, air flows, illuminance, noise) and any seasonal variations.
• Energy performance - how much energy the building uses, broken down by uses and fuel type(s), and how its energy performance relates to typical and/or good practice benchmarks - (see sections 7.19 and 7.20).
• Consideration of current energy management, whether through observations of occupant behaviour or review of building control arrangements.
> Project Information:
• Technology type (see sections 7.20 and 7.21).
• Demonstration of Whole Building Approach to technology selection and proposed interactions with other proposed recommendations.
• Conceptual design including system sizes and locations.
• Complexity and difficulty of installation including capability and skills required and potential risks (e.g. presence of asbestos).
• Maintenance requirements including capability and skills required.
• Assumption uses in calculations and resulting accuracy of recommendations.
> Emissions Information:
• GHG Emissions Scope(s) where reductions will be achieved (Scope 1, Scope 2, Scope 3).
• Impact on emissions reduction (often this will be quoted in percentages) ranked in order from greatest to least decarbonisation potential.
• Cost (£) per tCO2e over the lifetime of the technology (£/LT tCO2e).
• How and what would need to be done to ensure that changes in emissions are monitored through sub-metering (see section 7.13).
> Financial Information:
• Expected capital cost ranges.
• Expected operational costs.
> Other Useful Information:
• Additional potential benefits (see section 7.14.2).
There are several useful Annex's within BS EN 16247-2 (2014) that provide checklists for energy audits, and also examples of how energy reports can be structured - these can be applied appropriately to the Decarbonisation Options Assessment.
Appendix 2 includes a template decarbonisation options projects register which logs and records the summarised findings of all data analysis and survey outputs and decarbonisation options.