Lee Evans Partnership LLP
St. Mary the Virgin Church, Ashford16th September 2014
By John Minter and Patrick Osborne
Lee Evans Partnership LLP
St. Mary the Virgin Church, Ashford16th September 2014
1. The need for refurbishment
2. St. Mary’s before refurbishment
3. Systems installed
4. Monitoring In Use
5. Lessons Learnt and Future Work
Lee Evans Partnership LLP
The need for refurbishment
• Buildings are responsible for around 40% of the UK’s GHG (greenhouse gas) emissions
• There are 1.8 million non-domestic buildings, built at or below current building regulations. These will most likely still be in use in 2050, if not later
Lee Evans Partnership LLP
The need for refurbishment
There are 374,000 Listed buildings in England, and for refurbishment there are associated risks:
• Historical Significance
• Archaeology
• Moisture
Lee Evans Partnership LLP
St. Mary’s before refurbishment
• Consuming 200,000kWh a year for
heating
• Hot water provided by local electric
hot water heaters
• Inefficient lighting system
• Inefficient boilers - on cold days could
only get the church 14°C, and cost
£9,500 a year in gas bills
• Approximate Carbon footprint 38.8
tonnes of CO2 per year
Lee Evans Partnership LLP
St. Mary’s before refurbishment
Lee Evans Partnership LLP
Measures installed
Low Carbon systems include:
• GSHP bore holes
• Rainwater harvesting
• LED Lighting
• Innovative underfloor heating system
Predicted to lead to a Carbon footprint reduction of 33% (to 26.1 tonnes per year)
Lee Evans Partnership LLP
GSHP
Lee Evans Partnership LLP
GSHP
Lee Evans Partnership LLP
Lighting
Low Energy Lighting including LED flood lights
Lee Evans Partnership LLP
Underfloor heating system
Lee Evans Partnership LLP
Boiler Room
Dimplex SI24TE Brine/Water Heat Pump
New Potteron Derwent Compact Plus boiler
Kamstrup Multical 402 Meter
Lee Evans Partnership LLP
Monitoring in use
Sub metering of the GSHP
• Increased use of the space as a venue means it is difficult to
compare the before and after
• Total emissions after refurbishment equate to 39.7 tonnes per
year
• Feedback from the client suggests that the space can be kept at
a comfortable temperature, whilst before the heating system was
inadequate
Lee Evans Partnership LLP
Lessons learnt and future work
• Radial GSHP bores allow difficult sites to have low carbon heating
• The LED lighting is particularly successful – saving money and
energy
• Reviewing systems is important to ensure CO2 savings are
realised
• Further monitoring of the delivered temperature for the
underfloor heating is proposed for Winter 2014
Lee Evans Partnership LLP