Transcript Slide 1

SALIX HOMES RETROFIT STUDY
Alison Ball
Tim Whitley
Salix Homes Retrofit Study commissioned by GM Procure
Study Aims
Viability of an innovative retrofit programme
Most effective low carbon technologies
Job and training opportunities
Behaviour change programme
Methodology for calculating SROI
Funding sources
Replication
Dwelling
Emissions
Methodology
Hot
water
Heating
Fans + pumps
Lighting
Not in SAP Results
• SAP calculations
– Government tool
• Results in kgCO2/m2
• Assumed Occupancy
• Doesn’t include appliances
Included in SAP Results
Methodology
Appliances
+
cooking
+
plug loads
Properties
chosen
Properties
chosen
Type of dwelling
Property name
Number of bedrooms
Number of type in estate
Decade built
Flat
Sycamore court
1
873
1960
Flat
Joule Close
1
50
1980
Mid Terrace
Enville Road
2
28
1950
Flat
Carmel Road
1
36
1970
Mid Terrace
Shakespeare Road
2
120
1930
Mid Terrace
National Drive
3
131
1970
End Terrace
Regents square
4
10
1900
Current
Propertychosen
Condition
Properties
60
50
40
30
20
10
Property name
e
sq
ua
r
s
Re
ge
nt
riv
e
Na
tio
na
lD
oa
d
R
Sh
ak
es
pe
ar
e
el
Ro
ad
Ca
rm
Ro
ad
En
vil
le
Cl
os
e
Jo
ul
e
or
e
co
ur
t
0
Sy
ca
m
New boiler
Double glazed
Some roof insulation
Natural Ventilation
Leaky building
Emission rate (kgCO2/m2year)
•
•
•
•
•
-15.00
e
e
ai
ai
rt
ig
rt
ig
ht
ne
s
ht
ne
s
-10.00
Im
pr
ov
Im
pr
ov
s
s
R
oo
f
e
in
(3
m
(5
m
3/
hm
2
@
5)
1)
3)
5)
50
P
50
P
a)
)
)
Q
a)
pp
Q
/m
2k
ap
p
(a
@
VH
R
(n
ot
w
(U
=1
.
(U
=2
.
(U
=0
.
(U
=0
.
11
s
0.
3/
hm
2
M
VH
R
e
do
w
s
al
ls
al
ls
do
w
w
w
va
lu
w
in
te
te
w
M
U
Im
pr
ov
e
la
la
-5.00
Im
pr
ov
In
su
In
su
% reduction (kgCO2/m2/year)
Results 1 - CO2 reduction
35.00
30.00
25.00
Houses
20.00
Flats
15.00
10.00
5.00
0.00
80.00
70.00
60.00
% reduction (kgCO2/m2/year)
Results 1 - CO2 reduction
90.00
Houses
Flats
50.00
40.00
30.00
20.00
10.00
0.00
Solar Hot water
System
Photovoltaics
Wind turbine
Air to Air Heat
pump
Local woodchip
boiler
Community
heating (gas)
Community
heating
(biomass)
200
150
Houses
Flats
100
Cost of energy saved (£)
Results 2 Running Cost Savings
250
50
0
Insulate
Insulate
walls (U=0.5) walls (U=0.3)
-50
-100
-150
Improve
windows
(U=2.1)
Improve
windows
(U=1.5)
Roof U
value
0.11w/m2k
Mech vent
with heat
recovery
(not app Q)
MVHR (app
Improve
Improve
Q) (MR
airtightness airtightness
XBOX 70)
(5m3/hm2
(3m3/hm2
@50Pa)
@50Pa)
100
Houses
Flats
50
0
Cost of energy saved (£)
Results 2 Running Cost Savings
150
Solar Hot water System
-50
-100
-150
-200
-250
Photovoltaics
Wind turbine
Air to Air Heat pump
Local Woodchip boiler*
20.00
Houses
Flats
15.00
£/kg CO2 saved
Results 3 – Capital cost per kg Carbon
saved
25.00
10.00
5.00
0.00
Insulate walls
(U=0.5)
Insulate walls
(U=0.3)
Improve windows
(U=2.1)
Improve windows
(U=1.5)
Roof U value
0.11w/m2k
MVHR app Q
18.00
Houses
Flats
16.00
14.00
12.00
£/kgCO2
Results 3 – Capital cost per kg Carbon
saved
20.00
10.00
8.00
6.00
4.00
2.00
0.00
Solar Hot water System
Photovoltaics
Air to Air Heat pump
Local woodchip boiler
100.00
Houses
Flats
80.00
£ invested per £energy saved
Results 4 – Capital cost vs. running
cost saving
120.00
60.00
40.00
20.00
0.00
Insulate walls
(U=0.5)
Insulate walls
(U=0.3)
Improve windows
(U=2.1)
Improve windows
(U=1.5)
Roof U value
0.11w/m2k
MVHR app Q
75.00
Houses
Flats
50.00
25.00
£ invested per £ Capital
Results 4 – Capital cost vs. running
cost saving
100.00
0.00
Solar Hot water System
-25.00
-50.00
-75.00
-100.00
-125.00
Photovoltaics
Air to Air Heat pump
Local woodchip boiler
Results
• Flats
– Wall insulation
– Roof insulation
– MVHR systems
Results
• Houses
–
–
–
–
–
Wall insulation
Roof insulation
Biomass – other issues
MVHR systems
NOT air source heat
pumps
Targets
• Houses
• Decent homes standards
typically 25% reduction
• Target 35% reduction in CO2
from Decent Homes standard
• Target £200 running cost
saving
• Max 10:1 invest to save ratio
Targets
• Flats
• Decent homes standards
typically 20% reduction
• Target 35% reduction in CO2
from Decent Homes standard
• Target £60 running cost saving
• Max 10:1 invest to save ratio
Job and Training Opportunities
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•
GMP procure have a robust model
£1m turnover (labour) spend
delivers 2 training places
126 trainees recruited to date
Access to real jobs in construction
Opportunity for unemployed
tenants
Job and Training Opportunities
Possible jobs created
Decent
Homes
level
1
2
3
Description
Ventilation
Bath and Kit
Ass.
electrics
Level 1 +
Heating
Doors
Windows
Roof Ins.
Level 2 +
C. Wall Ins
Dry Line Ins
MVHR
(replaces
level 1 vent)
Job Years
6 months
On site
12 months
On site
2 years
On site
29
58
29
14
49
98
49
24
56
113
56
28
Tenant engagement and behaviour change
Current
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Comprehensive approach
Tried and tested tools
Participation mechanisms
Reward and celebrate
Framework to build on
Tenant engagement and behaviour change
Opportunities
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Tangible opportunity
Repeatable cycle
Awareness about benefits
Train tenants
Monitor change
Feedback findings
Key roles
Behaviour Change Case Studies
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Gentoo Housing - Sunderland
Staffordshire Housing
Greenoak Housing – Surrey and
Sussex
Drum Housing - Hampshire
Places for People - Lancashire
Social Return on Investment - SROI
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Non economic impacts tool
New Economics Foundation
Wider benefit measurement - debt risk,
comfort level, health
Evaluative or forecast
Maximise capital investment benefits
SROI
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–
strategic planning tool
communication impact
attracting investment
evaluate social value
Replicability
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Robust methodology
Evidenced approach
Monitoring
Cross section of Salix dwellings
Representative for North West?