Electrical Contractors

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Electrical Contractors Association
Paul Reeve CFIOSH FIEMA ECA Head of Safety and
Environment Green installation - so whats
working? Jan 2009
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What we are going to cover...

• Case studies
• The application of green measures to existing
  buildings
• - renovation project
• - feasibility exercise
• Outline some pros and cons of various electrical
  installation options

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UK slowly getting to grips with new build
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but what about existing buildings!? the
vast bulk of the buildings that will be standing
in 2020 were built decades agomost 2050
buildings are already standing...
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Demonstration project for existing house

• Victorian (1870)
• A conventional semi
• Solid walled
• No south facing roofs!
• Originally
• - poor insulation
• - six different window types

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Major refurbishment and extension

• Structural repair and extension (loft)
• Re-wiring
• New windows
• Damp-proofing
• Ongoing project aimed at
• Provide data
• Use widely available materials/systems
• Apply/measure as many methods as possible

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• Kitchen sink of green measures
• Heating
• Insulation lots of it
• Windows
• Underfloor heating
• Biomass / condensing
• Solar thermal
• Electrical
• suitable electrics
• controls
• lamps

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Annual CO2 emissions allocation (kgs)
Demonstration Project key outcomes so far
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Demonstration Project key outcomes

• Eco-measures were 15 of total refurbishment cost
• Economic pay-back 7-8 years on average.
• 55 reduction in CO2 from draughtproofing/insulati
  on
• Cost of measures linked to logistics and ease of
  installation
• Good control equipment is important
• Whole house plan works best
• Get the green measures right when doing other
  work

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Contact for the green refurbished house project
Russell Smith info_at_parityprojects.com 0208 296
0863 (www.parityprojects.com)
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Feasibility study- a larger house
All options considered Best for this house
includes Insulation (!) New boiler/solar
thermal Wood burner (local heating) Smarter
energy meter Greener electrics (switches,
wiring, lamps) Better controls
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Annex heated by electric wall heaters
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Air to air heat pump may be one answer
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Hierarchy for reducing a buildings carbon
footprint
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Modifying domestic use Measuring/displaying
energy use Smart meters have been shown to
reduce user consumption Avoid wasting
energy Lighting passive infra-red (PIR) sensors
can stop profligate waste - dont forget
external lighting (sensors)
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Energy efficient lighting

• Lighting technology is moving on apace
• Conventional tungsten lamps on the way out - by
  law!
• It seems likely that lighting manufacturers
• will fill the gap
• Myth you cant use CFLs with dimmer switches
• Yes you can and now
• using some CFLs from reputable names

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What about LEDs?

• Many impediments to using LEDs
• Applications need
• specific situations
• good quality luminaires
• fittings designed for an LED light source
• Domestic customers need to choose
• carefully tends to mean they dont want LED!
• Best potential applications include
• - stairway, hall/landing, bathrooms
• - but not living or dining rooms!
• One for the (nearish?) future

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Energy Efficiency Measures

• Localised instead of general lighting 60-80
• (dimming lights saves energy too and boosts
  lamp life)
• High frequency ballasts for fluorescent lamps
  15-20
• Replace old fluorescents with HF T5 versions
  20-25
• Tri-phosphor coated fluorescent tubes 30 (cf
  basic tubes)
• Lighting controls 20-50
• Use LEDs where appropriate 50-75

savings in energy use
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Electrical opportunities abound so its not
all about PV!

• Insulate first then.
• More efficient use
• Smart metering
• Smart homes
• Efficient use (photo timers/sensors)
• Lighting
• Controls - thermostats and programmables
• Renewable
• PV systems
• Note ME provides even more options...

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PV installation a tale of many projects
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Energy is not just a green issue...

• If you see energy as a supply issue
• - renewables look a lot better!!

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In space renewable options are limited!
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Conclusions

• In the two domestic premises we looked at
• Insulation is king
• Good control of energy use is essential
• Cost of installation is a dominant factor
• Lighting offers quick wins at (relatively) low
  cost

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Safety and reliability is paramount

• Any green installation programme will be at risk
  if
• Installations do not deliver
• Public (and employee) safety is compromised
• This means competent design, installation and
  servicing

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Green installation - so
what works?