the role of post occupancy evaluation
TRANSCRIPT
1
Making buildings better
The Role of Post Occupancy Evaluation
Saryu Vatal
Sustainable Construction Group
2
Making buildings better
2010 25%
reductions in
CO2 emissions
over 2006
2013 8%
reductions in
CO2 emissions
over 2010
2016 All new dwellings
to be ‘Zero
Carbon’ (regulated
energy)
2019 All non-domestic
buildings to be
‘Zero Carbon’
(regulated energy)
2050 80% reduction in CO2
emissions due to
operational energy use
from 1990 levels in all
buildings
At least 90% of all new
homes meet or perform better
than the designed energy /
carbon performance.
2020
Introduction of the
concept of the Fabric
Energy Efficiency
Standard (FEES)
2009
2006 Change in compliance
method from 3 optional
routes to single route
via SAP calculation for
CO2 emissions only
Clarification of scope
of ‘zero carbon’ to
refer to regulated
energy use only
2011
Private rental
properties to meet
minimum Energy
Efficiency standards
2018
Target energy and CO2 reductions
3
Making buildings better
Occupant impact on energy use
0
20
40
60
80
100
120
140
17 18 19 20 21 22 24 26 27 28 29 30 33 34 35 36 37 38 39 40 41 42 43 44 46 47 48 49 52 53 54 55 56 57 58
184
185
Gas
co
nsu
mp
tio
n (
kWh
/m2)
Plot number
Actual vs predicted gas consumption kWh/m2
Actual gas consumption (Sept'13 to Aug'14) kWh/m2 Predicted gas consumption (Sept to Aug inc.) kWh/m2
4
Making buildings better
Solar thermal installation
for pre-heating
Hot water cylinder to gas-
fired, condensing
combination boiler
Exhaust source heat pump
Complex systems
5
Making buildings better
‘‘The technology re. heating and
ventilation are too complex.’’
‘‘ No ventilation so have to leave
window open over night.’’
‘‘The controls for heating and ventilation
are in a very awkward place..’’
‘‘heating instructions useless -
rest of info ok. No information
on activating solar panels.’’
‘‘Very complex to understand’’
‘‘ It’s a collection of product information
some of which is relevant. Other
information should be issued.
‘‘ Were not shown heating or ventilation control,
had to work out best method ourselves using
manuals and talking to manufacturer..’’
‘‘ A lot was not relevant to our flat, for
example had gas system not electric.’’
‘‘ Very difficult to understand when things go wrong.’’
Complex systems and unfamiliar technologies
6
Making buildings better
Unintuitive controls
7
Making buildings better
Unintuitive controls
8
Making buildings better
Conflicting requirements
Source: NF50 Designing homes for the 21st century
9
Making buildings better
Post-occupancy evaluation
Operation Post-occupancy
evaluation
10
Making buildings better
Commissioning and handover
Seasonal commissioning
Design
Construction
Post-occupancy evaluation Operation
Post-occupancy evaluation
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Making buildings better
• Walkthrough
• Interviews
• Surveys
• Fuel bills
• Meter readings
• Smart meters
• Measurements
• Tests
• Monitoring
• Process/ information
review
Troubleshooting Energy use trends Detailed
investigations
1 2 3 4 5 6 7 8 9 10 11 12
kWh/£
