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Power Hours

This page contains the presentations from our ‘Power Hour’ events. In these fast paced talks we have a panel of speakers each with 8 minutes to present followed by a moderated panel discussion. We have a timer counting down from 1 hour and everything needs to be finished in that time! 

Click the presentation titles to download the slides as PDFs.



Power Hour- How to Predict Energy in Use?
There has been growing demand in recent years for accurate operational energy predictions from initiatives such as Design for Performance and the push for net-zero carbon targets. This has pushed the industry to improve standardised approaches to energy performance calculations and reduce the performance gap.
In this Power Hour, three experts talk on this subject:

  • Dr Nishesh Jain, UCL gives an ‘Overview of CIBSE TM61-64’
  • Richard Tibenham, IES,  provides ‘A software provider’s point of view’
  • Dr Ruchi Choudhary, University of Cambridge gives a case study of ‘Digital twins in the built environment’

Dr Helen Gavin, Ricardo, hosted the event 
You can watch a summary of the event here.
You can see the slides used below:

Dr Nishesh Jain
Richard Tibenham
Dr Ruchi Choudhary

Power Hour- Survey: What does Zero Mean?
22 October 2021

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

This video is a summary of that event.

The survey closed on Sunday 28th November
Watch the session on YouTube

Power Hour - Retrofitting Properties: Where Is The Road Map To Net Zero?
22 October 2021 
Currently, the lack of clear guidance and benchmarks for retrofitting properties with regard to energy efficiencies causes problems and missed opportunities to bring buildings up to the required standard to meet our Paris Agreement commitments.
This is particularly so for historical or listed buildings which may be problematic to retrofit and bring up to modern standards or may be exempt from any efficiency targets.  Given that the majority of UK emissions now arise from the built environment, retrofits are important and urgently needed. There is also  need to consider embodied carbon as well as operational carbon arising from energy use.
We gathered together experts in the field to talk on this subject. After each speaker set out their view there was a question and answer session moderated by Helen Gavin (Ricardo)

Access the presentations:
Geraldine O'Farrell, Historic England: Historic Buildings
Tina Fawcett, University of Oxford:  Residential Retrofit
Matthew Mapp, Sweco: The need to balance operational and embodied carbon and will touch on the potential issue of stranded assets


Do We Need Regulation to Achieve Net Zero Carbon in Offices? 
8 July 2021
With the many, often conflicting factors that need to come together to achieve net zero carbon offices, will we be able to get there by industry leadership alone? Refurbishment contracts currently don’t incentive those involved to ensure good energy performance in use; leases between landlords and tenants are often negotiated without any reference to energy performance requirements; and often buildings have no effective monitoring system to tell them how a building is performing, let alone clear operating instructions. Can all this really change without regulation?
We gathered together experts in the field to talk on this subject. After each speaker set out their view there was a question and answer session using question posed by the live audience moderated by Helen Gavin (Ricardo)

Watch the session on YouTube 

Access the presentations:
Alastair Mumford, Devon City Council: Net Zero in Offices
Carl Brooks, CBRE: A Property Management Perspective on Net Zero

Debbie Hobbs, ISG: The Game & The Players?
Roger Macklin: CIBSE EPG Introduction
Simon Keen, Hogan Lovells: The Legal Perspective
Simon King, Mitie: Net Zero in Buildings Making it Happen
Hydrogen Heating: The Future in the UK - The Good, The Bad and The Ugly
19 May 2021
This is an event jointly hosted by the CIBSE EPG and HVAC Group in which Serene Esuruoso, Chris Train, Richard Lowes, Tom Collins and Heidi Genoni talked about “Hydrogen heating: The Future in the UK– The Good, The Bad and The Ugly.
This event considered the pros and cons of hydrogen successfully displacing natural gas as the primary means of heating buildings in the UK.

View the session on YouTube

Access the presentations:
Serene Esuroso, Carbon Trsut: A brief overview of hydrogen for heating
Chris Train, CT Energy: Gas Goes Green: Decarbonising Heating
Ricard Lowes, Exeter University: Hydrogen for heat: the good the bad and the ugly
Heidi Genomi, Energy Advisory, Programme & Project Management, Arup: Hydrogen for Heating

Low and Zero Carbon Heat Networks: Can it be done? (Online)
21 January 2021

Heat networks currently account for a small proportion of UK heating systems, but low and zero carbon networks have an important role to play in the reduction of carbon emissions from heating. They also provide an opportunity to exploit larger scale renewable and recovered heat sources that otherwise cannot be used.
So what are Low and Zero Carbon Heat Networks? How have Heat Networks evolved? What are 5G heat networks? How will data improve the performance of Heat Networks? What are some examples of best practice currently? What are the associated metering and billing regulations, and what is the direction of government support for heat networks? These questions and more were tackled over the course of the session.
Access the presentations: 
Antony Meanwell, Eon Energy: "Citigen Decarbonisation"
Bhav Patel, Vattenfall: "Performance of Heat Networks"
Henrietta Cooke, BEIS: "Low Carbon Heat Networks - Policy Environment"
Phil Jones, London South Bank University: "Heat Networks"

Q&A summary
Green Tariffs, PPAs, Offsetting and Insetting (Webinar)
25 September 2020

Climate change is changing our planet and society and we need to reduce our emissions fast. One way to do this is to for people to sign up to green energy tariffs, and offset their carbon emissions. Companies and organisations can sign up to renewable energy power purchase agreements and inset their emissions. 

But what do these actions achieve on the ground? What is their impact? Do they create positive change and reduce our greenhouse gas contributions? What are the advantages and disadvantages of acting in this way? Is it lot of greenwash?

View the webinar
Access the presentations
Q&A summary

Covid-19: Energy Use Now and Lasting Legacy (Webinar)
22 July 2020
There is no doubt that the energy performance of buildings has been pushed back further in the agenda of organisations and individuals to prioritise the health and well-being of people. But how can the energy and sustainability professional community reassert the importance of energy use given that we still have climate emergency and net-zero carbon targets to achieve by 2050? This webinar looks at both the challenges around Covid-19 standards and energy use, commissioning, the changes in consumption habits, energy purchasing and more.

View full webinar on YouTube

Responsible Refurbishment (Webinar)
27 May 2020
Many organisations are signing up to net zero carbon targets. However, even if carbon neutrality in operation and the construction process is achieved, we will always be left with 'embodied carbon' in materials. For the first EPG Power Hour to be held online, our guest speakers tackled issues surrounding embodied carbon, and considered at what point you might refurbish a building rather than demolish and rebuild.

Access the PDF presentation

View the meeting on YouTube 


Getting Bristol Off the Gas Grid
18 February 2020
In February 2019 the Committee on Climate Change published a report entitled “UK housing: Fit for the future?” As part of that report they proposed that from 2025 at the latest, no new homes should be connected to the gas grid.
Preceding this, Bristol City Council had already become the first UK council to declare a climate emergency for the city, passing the motion unanimously. Consequently, the city council set an ambitious goal of making Bristol carbon neutral by 2030.
During this meeting - our first in Bristol - a panel of 4 experts gave their Power Hour opinions in short presentations, considering whether these goals are achievable, and how and or what the alternatives might be.


Net Zero Carbon: the short term and long term challenges and solutions
23 January 2020

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.

Come and find out more from our panel of 6 experts giving their Power Hour opinions in short presentations that will consider this challenging issue.

Presentation to follow


Getting Housing Off the Gas Grid
11 September 2019

In February 2019, the Committee on Climate Change published a report, entitled “UK housing: Fit for the future?”. An important part of this report is their proposal that no new homes should be connected to the gas grid from 2025 at the latest. Come and find out more from our panel of 4 expert speakers as they give their Power Hour opinions in short interesting presentations. These Power Hour opinions aim: (1) To provide insights into whether getting housing off the gas grid is achievable; (2) To provide insights into the views of the consultant, developer and utility providers; and (3) To provide insights into how and what the alternatives might likely be in the future. The names, affiliations and presentation titles of our panel of 4 expert speakers are described below:

  • Jake Attwood-Harris, Hawkins\Brown Architects - "Getting Housing off Gas Grid"
  • Kartik Amrania, Sweco - "The Consultant’s View"
  • Aaron Caffrey, Ballymore - "The Developer"
  • John Marsh, Metropolitan - "The Utility Providers View"
The Power Hour presentation slides are available at “Getting Housing Off the Gas Grid” - Slides

The Power Hour presentation commentary is available at “Getting Housing Off the Gas Grid” - Commentary

This Power Hour event was recorded live on Twitter and the recording is available at 
"Getting Housing Off the Gas Grid" - Recording


Fuel Cells - Do They Really Work?!
14 May 2019
With the predicted fall in the carbon intensity of UK grid electricity, is there still a place for fuel cells to provide carbon free heat and power for the built environment? Come and find out more from our panel of 5 expert speakers giving their 'power hour' opinions in short presentations that will give an overview of the technology, a developer's view, what experience has been so far from two operators and what we might see in the future.

This event was recorded live on Twitter. Click here for the video link.

Heat Pumps - Do They Really Work?!
12 Mar 2019
Heat pumps are not a new innovation, however with the predicted fall in the carbon intensity of the grid they are quickly becoming the technology of choice for heating, hot water and cooling applications in buildings across all scales. Before we commit to this on mass in the UK, is it worth pausing and considering the risks and consequences based on what we know so far? Come and find out more from our panel of 4 expert speakers reflecting on their experiences so far and what the future might bring.

This event was recorded live on Twitter. Click here for the video link.
Operational Energy Use - Can Anybody Really Predict It?
15 Nov 2018
Operational energy predictions have long been an elusive task for the industry, challenging even the best designers, clients and operators. With increasing demand for accurate predictions of operation performance at the design stage, including recent changes in BREEAM 2018 and more demanding client briefs, we must ask ourselves the tough question: can we really predict operational energy performance?

This event was recorded live on Twitter. Click here for the video link.

Electricity Storage for Buildings
28 Sept 2018

Battery storage is becoming a regular feature in technical news bulletins with global investment in energy storage expected to reach $550Bn by 2050 and the price of lithium-ion batteries falling by 80% since 2010. This event looks at electricity storage in buildings, the challenges this entails, how it affects the power grid, and how industry, owners and occupiers can help!

This event was recorded live on Twitter. Click here for the video link.


Metering for Fame, Fortune & Happiness
July 12 2018

Can no one get metering right? We have to put them in, but does anyone check they're working or even look at them afterwards? Forget metering for Part L! This event provides essential insight for metering multi-let buildings, as “Part L metering” can be insufficient for tenant billing, particularly in relation to heat networks.
This event was recorded live on Twitter. Click here for the video link.


Resources for speakers

Please download the PowerPoint template including guidance notes here