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YEPG Events


More upcoming events will be announced both here and on our Eventbrite page. 



Survey: What does zero mean?

The built environment in the UK and around the world is increasingly committed to achieve Net Zero buildings. But what does Net Zero mean?  To deliver real progress, we need to agree on what Net Zero means, in practice and in the detail.

As a step towards this, and building on the work by the UKGBC, in summer 2021 LETI and the Whole Life Carbon Network, supported by the RIBA, produced a set of definitions:

 CIBSE and LETI are now working together to produce a set of FAQs on the definitions, and we are running a survey about it, to make sure the definitions are applied consistently in as many real-life situations are possible, and that they deliver the right outcomes.

CIBSE and LETI are now working together to produce a set of FAQs on the definitions, and we are running a survey about it, to make sure the definitions are applied consistently in as many real-life situations are possible, and that they deliver the right outcomes.

They held an event on 8 November to hear people’s views on key questions on the meaning of Net Zero.

You can watch a summary of the event here: Survey: What does zero mean? - YouTube

We want to hear from you! Please give your views in the survey before it closes on Sunday 28th November.

Please view the draft FAQs here first:  Then please complete the consultation survey here:

In parallel, CIBSE are considering whether to adopt the definitions and are keen to hear views on this.

The survey asks for your opinion on the following:

  • Do you agree with the definitions and their interpretation in the FAQs?
  • Are the FAQs clear?
  • Do you have other questions that you think should be addressed in the FAQs?
  • Do you think CIBSE should adopt the definitions?

Here are some of the questions on operational energy and carbon:

  • Is a space heating target required as well as an energy use intensity (EUI) to meet Net Zero?
  • How are EUIs and associated targets calculated in buildings served by communal or district energy schemes?
  • My building is forced to connect to a community or district energy scheme which uses fossil fuels. Can it be considered NZ Carbon - Operational Energy, as long as it meets the energy target and renewable energy requirements? If not, do I have any other way to acknowledge my building's achievements?
  • The electricity grid is decarbonising, is there a point where renewable energy procurement will no longer be required?
  • Here are some of the some of the questions on operational energy and carbon:

Examples of some of the questions on embodied carbon:

  • Should onsite PV panels be included in a building’s embodied carbon target?
  • Should the embodied carbon of energy infrastructure related to a building be included in the Net Zero embodied definition?


Carbon Bite Night Series 2021

1. Humidity control on Indoor spaces (27/10/21) - Given the recent pandemic, more attention has been shifted towards ventilation practices. However Humidity control in the built environment continues at times to be neglected. The three speakers discuss active and passive measures available, and the following topics: 

  • How can you save energy & cost?

  • How does Humidity affects indoor air quality, comfort & the spread of COVID-19 ?

  • Available technologies for Humidity control?

​Rossella Perniola + Dave Marshall-George + David Black
The slides for the event are available here: Humidity control on Indoor spaces

This was YEPG's first in-person event since the pandemic. Thanks to WSP for hosting!

2. Quality Assurance of Heat Networks (04.08.2021) - The recent update to CP1: Heat Network Code of Practice (CP1 2020) places a much larger focus on verification of heat network performance. To meet these requirements and support the decarbonisation of the sector, it is clear that the role of quality assurance will become more important during the design and delivery of new schemes. This discussion will aim to highlight the importance of heat networks quality assurance and demonstrate quality assurance processes. Our speakers will also discuss the impact of quality assurance of heat networks from a housing developer and mechanical contractor's perspective

Tom Burton + Paul Craig + Ivan Grahn + Ricky Stevens
The slides for the event are available here: CBN2-Quality-Assurance-of-Heat-Networks

1. Demand side response (17.05.2021) - Given that we are moving towards an electricity powered future to achieve Net Zero targets, can our current grids accommodate the emerging demand in electricity as well as the anticipated unpredictability from increased renewable generation? With the increased uptake of storage solutions as well as onsite generation, how can these be utilised and integrated with the grid to decrease electricity bills and better manage the peak electrical loads? Speakers at this carbon bite night discuss the topics above. 
Sam Do + David Watkin 
The slides for the event are available here: Demand side response

Joint Events

1. CIBSE HVAC/FM/YEPG - Innovation in Building Services (15/09/21)
CIBSE HVAC, FM and YEPG are pleased to invite you to our upcoming joint event; Innovation in Building Services. Join us for a panel discussion around all things innovation within the industry, from understanding why the industry may not have been more innovative than it is to how further innovations can help us achieve our future energy targets. Our panel will be made up on industry experts from design, performance, manufacturer and operation with the discussion being lead by members of CIBSE Young Energy Performance Group. The panellists are;
1. Dr Claire Das Bhaumik, Partner at Inkling LLP
2. Greg Langridge, Business Development Manager/Energy Optimisation – Digitalisation at Danfoss
3. Trevor Edwards, GB Business Manager at Greenville Electrical
4. Steve Tomkins, Head of Business Development at SFG20


Carbon Bite Night Series 2020

1. The role of 5DH in the UK's path to net zero (30.04.2020) - 5th generation district heating has gained a lot of attention in the UK industry recently, with improvements in technology and updates to key regulations driving the use of heat pumps. However, design philosophy and implementation of this technology remains unknown to many, as few 5DH networks are currently operational in the UK.
Bruce Geldard + Tom Naughton + Chris Davidson
Watch the video on youtube at YEPG Carbon Bite The Role of 5DH in the UK's Path to Net Zero
The slides for the event are available here: YEPG Carbon Bite The Role of 5DH in the UK's Path to Net Zero

2. Taking commercial offices to net zero carbon (01.05.2020) - The release of the LETI Climate Emergency Design Guide in January and the UK Green Building Council targets for Commercial Offices in April have put Net Zero Carbon front of place in commercial office design. But how do we actually go about delivering Net Zero Carbon commercial office buildings? In this event speakers discussed how to achieve Net Zero Carbon in design, operation, and retrofit of commercial assets.
Jennifer Elias + Khasha Mohammadian + Oliver Lockhart
Watch the video on youtube at Taking commercial offices to net zero carbon

3. The impact of DHW temperatures on energy performance (12.08.2020) -
 Domestic hot water (DHW) temperatures have long been a discussion point in the industry, due to the impact of this set point on resident comfort, energy performance and public health. As the industry focus moves towards electrically generated heat, the impact of DHW temperatures on energy performance becomes increasingly important, and there is increasing momentum to reduce these temperatures. In collaboration with the Society for Public Health Engineers, the three speakers discuss their experiences and expertise on the factors that influence DHW temperatures and current research that will help to shape the conversation going forwards.

Steve Vaughan + Jonathan Gaunt + Andrew Mackay
Watch the video on youtube at The impact of DHW temperatures on energy performance
The slides for the event are available here: The impact of DHW temperatures on energy performance

4. Design to mitigate overheating in the built environment (02.12.2020) 

CIBSE YEPG & EPG Joint Event

Net Zero Carbon: The Short and Long Term (23.01.2019) - Having declared a Climate Change emergency what do we do now? The Committee for Climate Change suggested that all new housing should be off the gas grid by 2025. If we wait until 2025 does that simply make the net zero by 2050 all the more difficult? What practical steps should be taken in the short term and what will happen in the long term? The Energy Performance Group has assembled a top team of speakers including an Architect, an Engineer and a Developer to consider what concrete steps can be taken in the short term to address this issue. The Young Energy Performance Group have done something similar but focused on the longer term issues.

Carbon Bite Night Series 2019

1. Carbon Bite Night 2019 (22.05.2019) - We have discussed the GLA updates on carbon factors and their impact on design for new residential developments.

2. The challenges and the future of district heating in the UK (03.07.2019) - Our speakers have drawn on their experience in the heat network industry and spoken about the challenges that they have faced. 

3. The future of heat pumps (07.06.2019) - With the carbon factor related to electricity dropping considerably, lots of new developments are considering heat pumps as a key aspect for the energy strategy. For this reason, we have explored different solutions for heating and hot water generation, focusing the conversation on the energy efficiency and some critical aspects of the technologies presented.

Carbon Bite Night Series 2018

1. It's All in the Detail: Achieving the Passivhaus Standard (London) (09.05.2018) - The event has offered an introduction to the Passivhaus standard and an overview of all concepts & criteria and presented two case studies that have been recently completed - both of which won the CIBSE Building Performance Award in 2018. 
Christian Dimbleby + Will South + Khasha Mohammadian
Watch the video on Twitter at CBN 1 It's All in the Detail: Achieving the Passivhaus Standard

2. Integrated Building Design - Parametric Modelling (London) (07.06.2018) - An opportunity to hear the opinion of industry experts speaking about the importance of an integrated approach to building design and how Digital Design with parametric modelling is helping to achieve intelligent, smarter and efficient buildings. 

Herman Calleja + Ines Idzikowski + Buro Happold SMART Space team
Watch the video on Twitter at CBN 2 Integrated Building Design - Parametric Modelling

3. Hydrogen as a Fuel for Buildings (London) (13.06.2018) - The CIBSE YEPG has organised an evening of interactive discussions and presentations on Hydrogen and its use in buildings.
The event introduced hydrogen and its current position in energy infrastructure and presented a case study of its application in buildings.

Dr. Stephen Carr, + Bill Ireland
Watch the video on Twitter at CBN 3 Hydrogen as a Fuel for Buildings

4. Post Occupancy Evaluation: Is It All about the Energy? (Bristol) (18.07.2018) - The CIBSE Young Energy Performance Group and YEN South West joined in a collaborative regional Carbon Bite Night in Bristol. The event was focused around the topic of Post Occupancy Evaluation with our speakers questioning whether too much emphasis is placed on energy performance over occupant satisfaction and wellbeing. As well as a general background to POE and its challenges, some case studies will also be presented of its application in buildings, and how results from the analysis can result in buildings with better energy management and more comfortable internal environments.
Dr Michelle Agha-Hossein + Austen Bates

Carbon Bite Night Series 2017

1. The WELL Standard & Building Tour (London)  (29.03.2017) – Hosted at Cundall's Well certified building, this carbon bite night presented an introduction and interactive discussion of the WELL standard followed by a tour of the building.
Kavita Kumari
Watch the video on Twitter at CBN The Well Standard

2. TM54: Modelling in Practice (Bristol) (10.04.2017) 
Dr Anna Menezes + Kevin Couling + Tom McNeil

3. Environmental and sustainable design (12.04.2017) - Exploring the successes and challenges of employing best practice in real world settings, this carbon bite presents how the boundaries of building design are being pushed to reduce their environmental impact.
Simon Wyatt + Joe Jack Williams

Watch the video on Twitter at CBN Environmental and Sustainable Design

4. Energy efficiency in supermarkets (London) (26.04.2017) - With speakers from both academia and industry, this carbon bite presents the strategies supermarkets are employing to improve their energy efficiency.
Salvador Acha + Brian Cairns
Watch the video on Twitter at CBN Energy Efficiency in Supermarkets

5. Demand Response (London) (10.05.2017) - Speakers at this carbon bite examine the contribution that buildings and their systems can play in helping the National Grid manage peak loads.
Ian Rose + Edwin Carter + Maria Spyrou

Watch the video on Twitter at CBN Demand Response

6.  The Future of Decarbonisation - Gas Vs Electricity (London) (24.05.2017) - A break from the usual format for this series of events, this carbon bite night sees industry experts battle to reach common ground in a debate style evening.
Phil Jones + Huw Blackwell + Elliott More + Barny Evans
Watch the video on Twitter at CBN The Future of Decarbonisation

7. Crafting a Practical Passivhaus (Cambridge) (07.06.2017)
Gwilym Still + Matthew Traub

8.  Energy efficiency in listed buildings (London) (07.06.2017) - Speakers at this carbon bite explore the unique challenges presented when trying to improve building energy efficiency and the different strategies employed to overcome them.
Victoria Herring + Laurence Aston
Watch the video on Twitter at CBN Energy efficiency in listed buildings

9.   Optimal Building Performance (Cambridge) (14.06.2017) 
Dr Yeonsook Heo + Tom McNeil 

10.   Transparent Sustainability (Cambridge) (28.06.2017) 
Tom Spurrier + Joel Gustafsson

11.   Future of District Heating (Cambridge) (05.07.2017) 
Marko Cosic + Bill Watts


Carbon Bite Night Series 2016

1. Legal Background of Building Energy Performance Requirements (09.03.2016) – where does all the regulation come from and how much of what we do is driven by it (EPBD, BRUKL, EPC, DEC, ESOS, etc.)
Hywel Davies + Netza Jack
The slides for the event are available here: Carbon Bite Night - Energy Performance

2. District Heat Networks (23.03.2016) – major area of focus in London and many other parts of the UK
Phil Jones + Chris Grainger 
The slides for the event are available here: Carbon Bite Night - District Heating Systems

3. Controls (06.04.2016) - basics & impact of, importance of end user interaction w. building and environment, criticality of good/simple/intuitive design
Nicola Combe + Ben Brakes 
The slides for the event are available here: Carbon Bite Night - Controls

4. Metering (20.04.2016) - sub-metering, TM39, BBP Toolkit, links back to benchmarks, control, understanding of building performance
Quentin Babcock + Peter Tse 
The slides for the event are available here: Carbon Bite Night - Metering

5. Post Occupancy Evaluation (04.05.2016) - importance of end user, understanding what worked previously and how it could be improved in the future
Tom Kordel + Lisa Pasquale 
The slides for the event are available here: Carbon Bite Night - Post Occupancy Evaluation 

6. Energy Performance Benchmarks (18.05.2016) – what's out there, they're really old and need updating, other sources (i.e. not just CIBSE TM46.Guide F), building specific benchmarks for clients
Maria Spyrou + Karim Dada 
The slides for the event are available here: Carbon Bite Night - Benchmarking

7. Carbon Bite Night in Bristol: Behaviour and Energy Management (06.04.2016) - This event was kindly hosted by AECOM and examined the often misunderstood role of behaviour in the energy performance of buildings, as well as the relationship between increasing automation and occupants' satisfaction.
The slides presented by Phil Hampshire (Buro Happold) and Kevin Couling (AECOM) can be downloaded from here: Carbon Bite Night - Behaviour and Energy Management


The great 2014 summer series

1. User Behaviour - Do people matter? (pdf)

2. Performance Gap - Is there really one? (pdf)

3. Future Proofing - Do we need to bother? (pdf)

4. Building Management - Who is in charge? (pdf)

5. Simulation - Are we just ticking boxes? (pdf)

6. Energy Efficient Retrofits - Going beyond a face lift? (pdf)