Pollution; Exposure
Conditions
Keywords
Ventilation
Brief summary
Our overall goal is to optimize preferred, ventilating windows/apertures/vents in low-income neighborhoods of Dhaka, Bangladesh. We will: I. Collect baseline data on housing types and finalize windows/vents protoypes. II. Measure the impact of improved ventilation on air exchange rates in houses in low-income neighborhoods of Dhaka and characterize the current and potential market for windows/vents in households in low-income neighborhoods of Dhaka, Bangladesh. III. Understand recipients' (tenants and landords) perceived benefits of installed window/vent designs and difficulties faced with adoption of each design
Interventions
OTHERInstallation of ventilation
The intervention is installation of a ventilating structure, in this case a window in the house roof.
Sponsors
International Centre for Diarrhoeal Disease Research, Bangladesh
Johns Hopkins University
University at Buffalo
Stanford University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* 1\) lack cross-ventilation at the time of enrollment * 2\) have obtained landlord permission to make adjustments to their dwelling, * 3\) have a free roof where a window can be installed
Exclusion criteria
* 1\) Household reports receiving dust from nearby machine that pulverizes materials for making roads
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Household air exchange rate - spring (Part 3) | 50 minutes | Repeated household measurements of effective point ventilation to approximate air exchange rates in both treatment and control households will be obtained. Air exchange rates will be reported as air changes per hour for the home as well as liters of air per cubic meter per second per person. |
| Household air exchange rate - summer (Part 3) | 50 minutes | Repeated household measurements of effective point ventilation to approximate air exchange rates in both treatment and control households will be obtained. Air exchange rates will be reported as air changes per hour for the home as well as liters of air per cubic meter per second per person. |
| Household air exchange rate - fall (Part 3) | 50 minutes | Repeated household measurements of effective point ventilation to approximate air exchange rates in both treatment and control households will be obtained. Air exchange rates will be reported as air changes per hour for the home as well as liters of air per cubic meter per second per person. |
| Revealed willingness-to-pay for ventilation (Part 3) | 20 minutes | We will obtain stated willingness-to-pay for the ventilation designs through the BDM auction mechanism, which will be used to trace out a demand curve for ventilation, plotting the number of households that are willing to pay for a window agaist their stated price. |
| Household air exchange rate - winter (Part 3) | 50 minutes | Repeated household measurements of effective point ventilation to approximate air exchange rates in both treatment and control households will be obtained. Air exchange rates will be reported as air changes per hour for the home as well as liters of air per cubic meter per second per person. |
| Number of households that adopt the intervention (Part 3) | 20 minutes | Takeup of the intervention will be defined by whether a household had a ventilation design installed, either by winning the BDM auction paying the full price or by accepting a free installation after previously losing the BDM auction. |
| Concentration of radon gas in house (Part 3) | 7 days | We will assess the concentration gas in a subset of study households. |
| Concentration of indoor particulate matter 2.5 (Part 3) | 48 hours for normal tests; 72 hours for quality control tests. | We will determine the indoor PM2.5 levels in study households, as well as the number of hours with indoor PM2.5 exceeding 50 and 100 µg/m3 during the observation period. A subset of households will have longer tests for quality control. |
| Concentration of indoor particulate matter 2.5 (Part 2) | up to 5 hours | We will determine the indoor PM2.5 levels in study households, as well as the number of hours with indoor PM2.5 exceeding 50 and 100 µg/m3 during the observation period. |
| Concentration of outdoor particulate matter 2.5 (Part 2) | up to 5 hours | We will determine the outdoor PM2.5 levels near the study households. |
| Personal exposure to particulate matter 2.5 - mother (Part 2) | up to 5 hours | We will determine the PM2.5 levels near the mother using a monitor worn on her body. |
| Personal exposure to particulate matter 2.5 - child (Part 2) | up to 5 hours | We will determine the PM2.5 levels near the child using a monitor worn on her body. |
| Number of non-study, neighboring households that adopt the intervention and their willingness to pay (Part 4) | 15 minutes | We will survey households that neighbor enrolled study households to ask if they have installed a window on their own since the enrollment for the randomized control trial. If they did install a window, we will ask how much they paid. |
Countries
Bangladesh
Outcome results
None listed