Optihouse - Optimization of health and
sustainability goals for low income housing:
Delhi
2
To model, design and test housing and/or housing refurbishments for
low income populations that optimize the fulfilment of health
protection needs and environmental sustainability in the context
of climate change and growing energy insecurity.
Aims:
Housing (and
settlements)
linked to health
and well-being.
Energy use in
the home and
for residential
construction
accounts for
sizable GHG
emissions.
Evolving risks
due to climate
change.
Transdisciplinary research collaboration
3
CURE
development
practitioners/ urban
planners/ civil
engineers/ architects/
field facilitators
UCL
environmental design
and engineering/
building science/ social
science/ architects
LSHTM
public health/
epidemiology
Case study setting
4
The housing investigated is a
resettlement colony, Savda Ghevra,
located on the edge of Delhi, developed
by Delhi Urban Shelter Improvement
Board (DUSIB):
•Settlement was initiated in 2006
•Located to the North-West of New
Delhi will be home to 20,000 families.
•Families have been allocated empty
small plots of 12.5m2or 18m2.
•Area is characterized by self-built
incremental housing of varying
quality.
Methodology
5
Implementation,
monitoring and
evaluation
Problem
identification
Design
intervention
strategies
>>
Participatory action research approach
Methods
6
Problem identification
7
Problem identification
8
Self-assessment picture cards
Indoor environmental monitoring
Dwelling surveys
Architecture drawings
Damp Mould Heat
Indoor
pollution
Cold
Asbestos
Over
crowding
Sanitation
Water
Supply Falls Fire
Collision
Structure
Collapse
Electrical
Shocks
Security
Inadequate
Lighting
Noise
Mosquitoes
Pests
Cleanliness
Food
Infestation
Personal
Hygiene
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8 8 12 312 12 2334343624833263
8 8 12 12 12 3 8 12 12 812 812 8 8 8 8 12 12 8 8 12
8 8 12 12 12 12 812 12 8 9 6 12 8 2 8 8 12 12 8 8 12
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22912 12 12 412 9 2 12 26628412 12 8 4 12
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8896994962923424463669
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8 8 12 3698366349622293263
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8 8 12 12 912 612 62946822412 12 8 2 12
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66912 9 3 8 6 3 4 12 46828236466
2 2 12 12 12 6 8 6 6 6 12 69884612 9 4 6 6
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8 8 12 12 12 38612 4 9 4 12 8888912 4 8 6
8 8 12 12 12 3 6 6 3 8 12 83246639486
8 8 12 12 12 6 4 12 12 212 212 8888998812
8 8 12 912 36334923224863283
8 8 12 12 12 12 812 12 412 212 8 4 4 8 12 12 8 8 12
8 8 12 12 12 12 612 12 412 212 8 8 8 8 12 12 8 8 12
8 8 9 6 12 32632323226266426
8 8 12 12 12 12 2 6 3 6 12 86688896426
8 8 12 912 12 212 12 8383268612 12 8 8 12
Problem identification: Survey risk assessment
Problem identification: Self-assessment
Damp Mould Heat
Indoor
pollution
Cold
Asbestos
Over
crowding
Sanitation
Water
Supply Falls Fire
Collision
Structure
Collapse
Electrical
Shocks
Security
Inadequate
Lighting
Noise
Mosquitoes
Pests
Cleanliness
Food
Infestation
Personal
Hygiene
Problem identification: Differing priorities
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Rank
No.
Survey based risk
assessment
Self
-assessment
Consensus after FGDs
1
Heat
Damp/mould
Damp/mould
2
Cold
Mosquitoes
Heat
3
Indoor air pollution
Pest
Cold
4
Mosquitoes
Food infestation
Mosquitoes
5
Sanitation
Heat
Indoor air pollution
6
Personal Hygiene
Electrical shocks
Pest
Designing interventions
12
13
Design approach
Co-designing solutions
Factsheets
Assessed
options
Energy use
estimation:
Building
simulation
Cost
analysis
Health
impact
assessment
Community
workshops
Experts/
stakeholders
Pathways for
implementation
++
Developing design solutions
14
Community workshopsExpert workshops
Fact sheets & physical models
Insulated roof
with reflective
paint
Chimney or
vent for
through flow of
air and escape
of PM
Septic tank,
lined
‘Green
walls/roof’ for
temperature
control
Raised floor for
protection against
water ingress +/-
vectors
‘Fly ash’
blocks for
walls
Cover for
open drain
House design concept
Ventilation
Roof openings
(New build only)
Stove hood
Extract fan
Surface
finishes
Reflect paint
OR lime wash
Mosquitoes
Meshes on
openings
Shading
6
Overhang
7
Louvres OR
Greening on
front
8
Window
shutters
9
Awning
(Over concrete
roof only)
Retrofit options
17
Implementation, monitoring & evaluation
18
Implementation
Supported by:
10 new builds
10 roof repairs
10+ retrofits to existing dwellings
19
Construction of the core structure:
- Concrete columns and beams (structural safety)
- Fly-ash brick walls (low-cost, low-embodied carbon, higher thermal resistance)
20
Implementation of building features:
Mosquito meshes over
openings
Awning, to provide shading over
roofs
21
Implementation, monitoring & evaluation:
Post-intervention monitoring (ongoing):
- Indoor environmental monitoring
- Mosquito counts
- Occupant interviews
Thank you for listening.
22