1. Thinking about Energy Efficiency
David Thorogood
Environmental Strategy & Development Manager
East Herts Council

2. Why energy efficiency?
Check your energy efficiency
Key actions
Community Energy

3. Climate Change
Likely Future trends in Hertfordshire (low to medium scenario):
Daily max summer temp: 3 to 6 degree rise over 30 yr mean
5 day winter rain accumulation : 6 to13mm over 30 yr mean
Max summer typically 30°C. Hottest day around 35°C. Longer heatwaves
Increase extreme events drought / flood/ wind/ snow?
Water Abstraction demand: 150 to 200% of current
(UK Cttee on Climate Change Risk Assessment 2017)

4. Climate Change
Climate Change Act set UK emissions reduction 80% by 2050 (1990 base)
UK has achieved 35% cut but heading off track
Domestic/commercial emissions will need further year on year 3% drop
So significant action needed
Adds to pressure on price

5. Fuel Costs Generally upward price rise in all fuel types over time
Some stability this year
But is this about to change?
Significant rises still looking likely next year

6. What? Need to take stock Review your energy use Look to the future
“If you can’t measure it, you can’t manage or improve it.”

7. How? Audit your energy use Take regular meter readings (Smart?)
Assess overnight energy use
Check your tariff!
Off gas? Oil club
Benchmark & seek advice
Remember the energy hierarchy:
Switch off and save
Tariff/ Insulate/ equipment efficiency
Then consider alternative energy

8. Smart Meters Government mandated installation by energy suppliers of smart energy meters in all domestic and smaller non-domestic premises by 2020

9. Behaviour Change Review heating/cooling time Reduce temp when possible
Stop manual override
Reduce lighting load – switch off and more efficient luminaires
Keep up to date with maintenance

10. Heating Do you have effective/any controls? Check timings
Effective insulation
Reduce thermostat by 1 degree
Check system balanced
Weather dependant time switches
Modern boilers – now 90% efficient
TRV’s
App based control
Cooling?

11. Hot Water Hot water set to 60 degrees check timings
aim for water to run out at end of day
smaller cylinder/ instantaneous?
even the tea urn!

12. Lighting Assess wattage and needs Any incandescent bulbs?
Fluorescent good (T12/T8/T5), but LED much better
50% less energy/ 5-10 times longer (reduced maintenance) /3-7 yr pay back
Use PIRs for infrequent areas
Costly Flood lighting?
- switch to LED

13. Insulation

14. Insulation Loft insulation: £5/m2 = 1-2yrs
Cavity wall insulation: £5/m2 = 2-3yrs
Suspended Floor insulation: £5-£10/m2 = years
Flat roof insulation (internal/external): Expensive and often best done as part of roof refurbishment £15/m2 = 15+yrs
Solid wall internal/external: £20/£45per m2 =12-20 yrs
Double Glazing :Generally only cost effective when replacing old windows £250+/m2 = 20+years
Tank jackets/pipes/draught proofing: always makes sense

15. Thermal Imaging Camera

16. Look to the future Renewables - costs falling;
- range of technologies inc solar; heat pumps; biomass and micro CHP
Battery storage – perhaps the next big thing?
EV charging hubs

17. Grants Carbon Trust: Green Business Fund East Herts Council
Up to £10,000 to put towards the purchase and installation of energy efficient equipment
Expected savings must exceed project costs in 5 years max
Must have charitable status
Equipment should be purchased from Green Business Directory supplier
East Herts Council
Community Capital Grants
Leaf Grants
ACRE
Rural Community Buildings Loan Fund (Loans up to £20K)

18. Community Energy Government 2015 Community Energy Strategy
Collective action to reduce, purchase, manage & generate energy
Emphasis on local engagement, community control, local benefits
3 aims:
Maintain energy security/tackle climate change
Saves people money .
Encourages wider social/economic benefits inc community cohesion

19. Community Energy
“Community energy is all about people and communities working together to save, generate, purchase, and manage energy, with local people benefiting from the power produced or saved.”

20. Community Energy Locally: Herts CE network to bring groups together
Work with schools to promote concept
310 possible community assets for PV in East Herts = possible 119,000kW generating potential
Hertford Energy Now – 3 Mill Meads; Hunsdon; Morgan schools

21. A decade of growth In 2005 fewer than 20 community energy projects
Now 30x that number!
In Germany c.65% of its huge renewable energy capacity is community-owned.
UK community ownership is less than 10%
Total share of electricity generation from renewables over 25%

22. Contact:
David Thorogood