Part L 2021 has introduced significant changes that directly affect mechanical and electrical contractors, particularly around energy efficiency, lighting, controls, and commissioning requirements.
This thread aims to break down what Part L 2021 actually means in practice for MEP contractors working on UK projects.
Topics to discuss:
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Key changes compared to previous Part L editions
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Impacts on lighting design, controls, and SBEM calculations
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Requirements for commissioning, testing and handover
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Common compliance issues seen on site
How are contractors finding compliance in the real world? Are consultants interpreting the requirements consistently?