How to calculate the ENE 04 credit
The aim of the criteria is to recognise and encourage the appropriate use of local energy generation from renewable sources.
One Click LCA helps you to achieve one credit for the ENE 04 LZC (low and zero carbon) technologies: in order to achieve the credit, you must first fulfil the first credit of the assessment criteria.
For the ENE 04 credit, you must use the 'LCA for building elements (BREEAM SE/NOR)' tool. BREEAM requirements for two credits
Criteria 1 to 3 are achieved.
The feasibility study includes a Life Cycle Assessment (LCA) of the carbon impact of the chosen LZC system(s), accounting for its embodied carbon emissions and operational carbon savings and emissions. The LCA study must be completed in accordance with ISO 14044:2006 Environmental Management Life Cycle Assessment – Requirements and Guidelines.
The LCA must consider a 60 year period (a typical assumption for the life of a building) and any necessary replacements/maintenance requirements within this period.
There are a couple of different options available to calculate the credit.
Option 1. Your LZC technology will be an additional installation to reduce e.g. electricity impacts:
Insert your LZC technology in the Building element materials input form (in the 'Building element materials' query), add quantity, the service life of the system (or system elements separately), and transport distance to the building site.
Provide a description to the 'Building element and solution description' detailing what will be included in your report.
Set your calculation period to 60 years.
Fill in the question form 'Building element impact', where you need to input building element impacts at the construction site (construction process impacts), additional transportation (if relevant) and impacts of energy and water use, which can be positive and/or negative.
For the Building element impacts form, you need to enter at least the relevant waste production (packaging of the technology).
If your LZC is a heat pump, enter its electricity consumption as a positive value and heating consumption as a negative value.
Option 2. Your LZC technology is an alternative option for a conventional heating system (e.g. ground source heat pump):
Fill in the information about your LZC technology as guided in the first option.
Fill in the information about your conventional heating system to the new design (create a new design on the project main page by clicking '+ Add a design').
Compare designs in the results page (click 'Compare designs'), to demonstrate how the environmental impacts will be reduced. If the comparison doesn’t show improvement, the installation of the LZC over the service life of 60 years is not justified.
Explain your findings in the documentation. One Click LCA enables you to try out different options. The easiest way to compare different LZC technologies is to create a new design and compare results. In this way, you can find the most optimal solution.