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Results and Findings:Winrock & EPA Measuring and Understanding Household

Stove Use Workshop and Field Study Series

Michael Naleid and Charity Garland, ETHOS 2017

Objective of the Workshops & Field Studies

To provide implementers working in the clean cooking sector with the

knowledge and skills to comprehensively and effectively assess and

understand patterns of adoption and use of clean cooking interventions,

with the aim of providing valid, robust data to facilitate and guide best

practice.

At the end of the workshop, participants are

equipped to:

• Understand background and context for

evaluating stove use/adoption.

• Plan, develop and execute an informative, high-

quality stove usage study.

• Analyze and use the data collected at a project,

program, company, and/or policy level.

• Share knowledge with others working in this field

to build capacity on a regional level.

Measuring and Understanding Household Stove Use Workshop

and Field Study Series

Location & Date Workshop & FS

Host(s)

Field Study

Intervention Stove(s)

Field Study Details

Malawi 2015 Maeve and the

Malawi Bureau of

Standards

Chitetezo Mbaula

(Maeve)

• Longitudinal cross sectional design

• 1 stove

• 80 hhs, 1 location

• 3 groups (baseline, new acquisition

group, longer-term purchaser group)

• 3 month duration

Guatemala 2016 StoveTeam

International and

Ecocomal

Ecococina and

Ecoplancha

(Ecocomal)

• Before & after design

• 2 stoves

• 80 hhs, 2 locations (ecoplanca

village & ecococina village)

• 2 groups per location (before and

after)

• 7 month duration

Vietnam 2016 SNV Netherlands

Development

Organisation

THX (GreenGen)

and

TM (Tiến Mạnh)

• Cross sectional design

• 2 stoves

• 46 hhs, 2 locations

• 2 groups per location (intervention

and control)

• 2 month duration

Vietnam Results

THX

Stov

e

TM

Stov

e

When was the intervention stove

purchased?

Vietnam Results

THX Stove TM Stove

Extremely

Satisfied

Satisfied

Somewhat

satisfied

Satisfaction Levels of Intervention Stoves

Vietnam Results

THX Location TM Location

Vietnam Usage Results - iButtons

0

0.5

1

1.5

2

2.5

Control TM Stove GroupSto

ve E

vents

Stove Group

Iron Bar LPG TM Stove

0

0.5

1

1.5

2

2.5

3

Control THX Stove Group

Sto

ve E

vents

Stove Group

Iron Bar LPG THX Stove

pe

r D

ay

per

Day

2 weeks

Te

mp

Vietnam - Study considerations

• The users of the TM stove reported slightly higher levels of

satisfaction with the THX stove users

• Reasons for dissatisfaction of the new stoves were poor

cleanliness of pots & pans, smoke production, and inability to fit

different pot sizes and cooking styles

• Higher reported satisfaction also correlated with higher rates of

the new stove being used as the primary stove and greater

traditional stove displacement

• Different demographic makeup of locations means the results of

the two studies can not be directly compared

Malawi Results

Stove Stacking

3 months post-study

onset

• Stove stacking driven by

time and convenience

factors.

• Stacking occurred most

frequently in the morning

and evening when cooking

volume is high and cooks

are in a hurry to feed their

family

Malawi Results

Average time spent cooking on the CM per day by study week

Summary

• Evidence of integration of CM into weekly cooking patterns.

• Usage is rarely exclusive or even daily

• Consistent and continued use, even during the wet season

when wood is scarce and difficult to light, suggests possible

long-term adoption, although longer-term measurements

needed to confirm this

• Seasonal Fuel switching prevalent: firewood is wet and scarce

combined with no separate kitchen means the rainy season

force cooks inside, which is easier and seen as healthier to

use a Kenyan Ceramic Jiko (charcoal)

• ‘Yes, I use the Chitetezo Mbaula most of the time but when it

comes to the rainy season and the rain is falling I use the KCJ

because I don’t have a kitchen’ -Long term purchaser

Considerations for further study

• If stove stacking present prior to study intervention, it may be

unrealistic to expect this to stop on introduction of a new

stove. Consider two stoves or duel fuel stoves in fuel

swapping situations.

• Challenging to accurately compare stove usage traces of

stoves with very different thermal properties. Consider what

tools are appropriate (iButtons, kSUMs, etc.)

• Cooking event observation during stove use monitoring could

guide understand in what different temperature patterns mean

in terms of actual cooking

• Continue the discussion on how best to define cooking using

SUMs

Acknowledgements

John Mitchell, U.S. EPA

Elisa Derby, Winrock International

Katie Gross, Winrock International

Kirstie Jagoe, Berkeley Air Monitoring Group

Michael Johnson, Berkeley Air Monitoring Group

Dana Charon, Berkeley Air Monitoring Group

Jonathan Rouse, HHE Consultant

Maeve

Malawi Bureau of Standards

StoveTeam International

Ecocomal

SNV Netherlands Development Organisation, Vietnam

Workshop Photos

Workshop Photos

VIETNAM RESULTS

THX

Location

TM Location

RESULTS THX – VIETNAM

0

20

40

60

80

100

120

140

160

Control THX Stove Group

Sto

ve D

ura

tion (

min

/day)

Stove Group

Iron Bar LPG THX Stove

0

20

40

60

80

100

120

140

Control TM StoveGroup

Sto

ve D

ura

tion (

min

s/d

ay)

Stove Group

Iron Bar LPG TM Stove

Stove Use: Cooking Events per week

• TEXT

Malawi - Motivation and barriers to buy

• The value proposition of saving fuel and increasing cooking

speed greatest motivation for the long-term purchasers to buy

the stove.

• Availability and affordability main barriers- even with such

inexpensive stove..

• Men seem to drive the purchase of the CM.

• SSI data suggests that when women are the decision makers

they are less likely to have purchased the stove.