Improving Energy Performance of New and Existing Buildings Dr Kerry J Mashford, Chief Executive, National Energy Foundation CIBSE Building Performance Conference - October 2014 Improving the use of energy in buildings

NEF – improving the use of energy in new and existing buildings Management – existing buildings Retrofit and refurbishment Making better buildings Procurement – new building Making buildings better Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

Probe exemplar buildings post occupancy – actual twice as much as design The scale of the problem ( 1) 1 Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

Carbon Trust studies – (Low Carbon Buildings Accelerator and Low Carbon Buildings Programme) Indicate actual energy use up to 5 times higher than specified The scale of the problem Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

InnovateUK– Building Performance Evaluation Programme Over 100 new build projects + 3 refurb 49 non-domestic studies, 56 buildings 366 dwellings (developments 3989 dwellings) Completion and early occupation / in-use Energy use typically times predicted Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

Non-Domestic Building types The BPE programme buildings fall into 13 building types. Schools and offices are most prevalent. Courtesy – InnovateUK Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

Composition of the Performance Gap

Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

Emerging themes – courtesy InnovateUK Non-standard hours & unregulated loads (TM22) Commissioning –buildings fully commissioned Sub-meters and reconciliation – not functioning or understood BMS – training, complexity, functionality, commissioning Controls – complexity, operating instructions and labelling Lighting – too much, zoning deficiencies and lack of control Fabric performance – specification and construction HVAC – integration and control of multiple systems Renewables – installation, operation and maintenance Energy strategy not properly implemented …..what do these tell us? Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

What can we do about it? Emerging Themes Root cause analysis Actions to mitigate Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

New Building Process Standards Respond to relevant emerging themes Building Performance Exchange – please share! Address root causes Implement smart mitigation actions Embed in practice; contracts; client ‘pull’ Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

Planning Design Construction Process standards – New Build Construction Design In-use As-built

Improving Energy performance in Existing Buildings - VolDEC Legal & General, Building Energy Solutions, National Energy Foundation Not for profit scheme to benefit whole industry Separates landlord and tenant energy Piloted on 16 multi-tenanted offices – extending to retail next Uses same methodology as statutory DECs with extended G ratings for greater differentiation Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

VolDECs – Why? Provides landlords and tenants with comparative energy performance of the areas they control Highlights building energy performance Provides a clear driver for improving performance Gives reputational and financial value to energy performance Provides a simple soft-start, leading building operators towards more sophisticated benchmarking Encourages greater retrofitting and energy related improvements, resulting in better buildings, economic activity and jobs Aims – to established a consistent methodology and QA across the industry to support the development of improved and relevant building energy benchmarks – e.g. type 4, scenario 5, office. Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

VolDEC - Method and benchmarks Dr Kerry J Mashford, CIBSE Building Performance Conference – October 2014

Improving the use of energy in buildings