cfmd conf edwards greenbldgspay
Post on 05-Apr-2018
218 Views
Preview:
TRANSCRIPT
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
1/28
Green Buildings Pay- the Benefits of GreenDesign: (offices and schools)
Prof Brian W Edwards
Author of books :
Green Buildings Pay Rough Guide to
Sustainability
SustainableArchitecture
Green Architecture
RIBA sustainabilityadvisor 2000-2
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
2/28
Questions addressed in research:
Main Question :How do green buildingsPay?
What measures of benefit should we use
What is the mix of Social, Economic and
Environmental benefits Is it energy use that most matters
What is the relationship between energy
use, wellbeing, health and staff
productivity Do green buildings produce image
benefits for the company
How is a green office defined (BREEAM)
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
3/28
Context
Buildings are responsible for47% of UK energy use(heating, lighting andventilation)
Office buildings areresponsible for 8% of UK
energy use and 15% ofelectricity use
Lighting and ventilation aremain users of energy in UKoffices
Cooling often exceedsheating bills over typicalyear
Staff costs (60-80%) exceedbuilding costs (7-9%) andrunning costs (4-5%) over
lifetime of office building.
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
4/28
Changing Perspectives on Green Office
Design 1980-2008
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
5/28
Research methods
9 (12) case studies of green officesin UK
Problem of defining the green office(used BREEAM)
Triangulation of perspectivesbetween developer, designer anduser
Qualitative and quantitative data UK and international comparisons
UK government, RIBA, BCO funding
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
6/28
Diversity of case studies
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
7/28
Barclaycard, Northampton: Casestudy
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
8/28
The case studies
Building Architect Developer
Helicon Building, London Sheppard Robson Manchester
Assurance
Brindley Place, Birmingham Siddell Gibson Argent Group
Longman HQ, Harlow Conran Roche Longman Group
Mistral Building, Reading Foster and Partners British Gas
PowerGen HQ, Coventry Bennetts Associates PowerGen
British Gas Building, Leeds Foggo Associates British Gas
BRE Offices, Watford Feilden CleggBradley
Building ResearchEstablishment
(BRE)
Barclaycard HQ,
Northhampton
Fitzroy Robinson
and Partners
Barclays Group
Milton Park, Oxford RMJM Landsdown Estates
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
9/28
Case studies: main green featuresMilton Park Renewable energy
Solar shading
Public transport
Natural working environment
Helicon Mixed use
Triple glazing
atrium
Brindley Place Solar design
Natural ventilation
Longman High thermal mass
Solar atriaPublic transport
Mistral Radiant cooling
Facade venting
Water conservation
PowerGen Orientation for cooling
Shallow plan
Thermal mass and atria
British Gas Climatic facades
Stepped atria
Water recycling
BRE Office Recycled construction materials
Integrated solar and wind ventilation
PV electricity
Barclaycard Linear atria with active solar shading
Water fabric cooling and recycling
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
10/28
BRE office, Watford
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
11/28
Helicon Building, London
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
12/28
British Gas Offices, Leeds
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
13/28
Initial issues from researchquestion
Are there different perceptions between
developer, designerand user
What are the key motivations behind the
commissioning of green offices What are the features that matter most to
users of green offices
Do different types of office affect the
approach to green design
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
14/28
The different perspectives:Overall findings
Client wants commercial
advantage through lower costs
Client wants a green image for
marketing purposes
Designerthinks green enhanceshis reputation
Designer is motivated by ethical
concerns Userwants a healthy working
environment
Userwants control of the
workspace environment
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
15/28
Specific benefits of green offices
2-4% increase in productivity of staffin green offices
Enhanced company and tenant
image Enhanced reputation of developer/
architect
Raised ethos of neighborhood
Lower utility bills and less exposure
to rising energy costs
Lower exposure to changing
environmental legislation
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
16/28
What are the disadvantages
Fordevelopersbuildings do not perform aspredicted
Fordeveloperstechnology not reliable
Forusers, temperature ranges too great(forgiveness factor needed)
Forusersit is important that there isrespect for values of building
Fordesigner, extra design time, risk andcost
Fordesigner, extra construction cost anduncertainty
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
17/28
Case Study Example:Barclaycard Headquarters,Northampton, UK 2,600 staff in one building
Social space driven by approach to
environmental design (eg atria)
Holistic approach to sustainabledesign- energy, water, health,
interior landscape, wellbeing
Excellent BREEAM rating Productivity up 4% with utility bills
down 24%
Building used as best practice
example
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
18/28
Barclaycard Building. FitzroyRobinson and Partners
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
19/28
Hidden benefits of green offices
Attraction andretention of best or
committed staff
Reduced stress
through natural
working environment Sends message of
environmental care to
neighbourhood
Improves marketing
of company Widens appeal of
building (to tenants)
Daylight improves
concentration
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
20/28
Reality of performance (BUILDING)
Buildings do not perform aspredicted (5-25% energy gap overBREEAM assessment)
Air-tightness is problem (draughts)
Poor window design, esp internalblinds and external shading
Lack of user responsiveness leadsto sabbatage of controls
Noise, esp in open plan
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
21/28
Realities of performance (USERS)
Users like to control theirindividual workspaceenvironment
Users do not trustcomputerised buildingmanagement systems
Users like natural materials Users like atria for social
reasons
Users tolerate temperaturevariations in green settings
Users more interested inpersonal health than energyefficiency
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
22/28
International comparison: Study of 33 LEEDGreen offices in USA (Gregory Kats at Cap.e)
The higher the environmental standard the
greater the productivity and life-cycle benefits
Natural light and ventilation appear to be mainfactors (in productivity) as long as under usercontrol
Extra construction costs (0-3%) recovered in5-8 years through productivity rather thanenergy cost savings
Image is important commercially (added value)
Main cost benefit is in health and productivity(70%) rather than lower energy costs (11%)and reduced building maintenance (16%)
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
23/28
Green Schools research: Do GreenSchools Pay?
Methodoloy
modelled on
green offices
44 green schools
2 clusters
(Hampshire and
Essex)
10 studied in
detail
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
24/28
Triangulation of environmental,social and economic factors
Green schools defined against
BREEAM methodology
SATS results (quantative)
Ofsted reports and interviews(qualitative)
School data
Control group schools forcomparison
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
25/28
Similar findings to green offices
Green schoolsimprove teachingand learning (3-4%)
Less teacher
turnover andsickness
Better SATS results
Less exclusions
Community benefits
Favourable Ofstedreports
Key factor appearsto be daylight
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
26/28
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
27/28
Factors discouragingconstruction of green buildings
Higher construction costs
Lack of awareness of benefits
Lack of researched case studies
Difficulty in developing researchmethodology
Reliability and secrecy of data
Difficulty in quantifying benefits thatimpress clients
-
7/31/2019 Cfmd Conf Edwards GreenBldgsPay
28/28
top related