HealthyFOILNCT07206251
The Effect of the Window Films on Cognition, Perception, and Health
A study testing Foiled Windowed room (foil added) in people with Healthy, run by Maastricht University Medical Center at 1 site in Netherlands.
Trial summary
To enable the Netherlands to reach the 2030 carbon emission goals, older homes need to be renovated to become more energy-efficient and comfortable. This project aims to provide shallow renovations of window films. Read more about this study
- Who is it for?
- Ages 18 to 40 yearsHealthy volunteers can take part
- Conditions the study is for
- Healthy
- What is being tested?
- Foiled Windowed room (foil added)
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 41 participants
- Where
- 1 siteNetherlands
- Study dates
- 26 Jul 2024to 29 Oct 2024
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 40 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Generally Healthy Adult
- Ages between 18-40 years old
- Normal or correct vision (with use of glasses or contact lenses)
- Full vision
- Both males or females
Who cannot join
- No Raynaud's syndrome
- No metabolic or cardiovascular diseases
- No ADHD or cognitive disorders
- No night shift work
- No colour blindness
Trial locations and contacts
1 site in 1 country.
About this study
To enable the Netherlands to reach the 2030 carbon emission goals, older homes need to be renovated to become more energy-efficient and comfortable. This project aims to provide shallow renovations of window films. These shallow renovations can be completed in 1-2 days and cost significantly less than a deep renovation. The study aims investigate how such window films can affect humans (low-e film and thermochromatic) if applicated in real life.
Read the detailed description
This study consists of one screening session (1.5 hours) and two testing sessions (5.5 hours each)
Screening session:
In the screening session, a questionnaire about general information as well as a medical questionnaire that asks about, current health status, lifestyle, morningness-eveningness chronotype, use of contraceptives, and sleep quality are completed. This data is necessary to assess the eligibility and to analyse the collected data with consideration of possible effect of lifestyle.
Testing sessions:
Subjects will be exposed to 2 different conditions (window film vs. no window film) in two days (11:15- 16:45) to assess the window film(s) influence on visual and temperature comfort, sensation and perception. The exposure rooms are low-e film room (film 1) or a thermochromic film room (film 2), compared with no film room (control). These films will be applied to windows. 2 cognitive cognitive tests, 2 vision tasks and fill in questionanires at set times are performed. Also wearable sensors as mentiond in Part 3 section 2 to measure their physiological parametersm suchs as skin temperature, heart rate and physical activity. Lastly, every hour a saliva sample by spitting into a tube to measure the cortisol level in the saliva is provided. Saliva is collected to measure cortisol changes caused by the environment. The samples are then stored immediately in a -20 freezer, after it is transported to the storage lab they will be centrifuged for 2 mins at 1000g and then stored in a
-80 freezer for the duration of the study until analysis. The storage room is secured and only the research team can assess the samples. When the samples are to be analyzed for cortisol, the sample is defrosted and tested by a spectrophotometer to quantify the amount of cortisol. The sample is then discarded after this analysis.
- Conditions
- Healthy
- Being tested
- Foiled Windowed room (foil added)
- Keywords
- Window Foil, Thermoregulation, Thermal Perception, Daylight, Saliva, Cognition
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Foiled Windowed room (foil added)Behavioural
Foiled Windowed room (foil added)
| Study group | Role | What they receive |
|---|---|---|
| Regular Windowed room (no foil added) | No intervention | Regular Windowed room (no foil added) |
| Foiled Windowed room (foil added) | Experimental | Foiled Windowed room (foil added) Receives: Behavioral: Foiled Windowed room (foil added) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Cognitive Performance Scores
Participants completed 2 cognitive battery tests (Creyos) during each test day at 2 different timepoints; one early afternoon, the other late afternon.
Measured: 2 x in 5 hours test session both test days
Secondary outcomes (2)
Skin Temperature
Temperature in celsius
Measured: every 1 min it is collected automatically over 5 hours test day and 2 test days
Visual Scale
Visual perceptual likert scales
Measured: every 30mins to 1 hour over 5 hours test day and 2 sessions in total
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 Oct 2025
- Study start26 Jul 2024
- Primary completion29 Oct 2024
- Study completion29 Oct 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for HealthyStudies of the same condition, open and under way.
- More trials run by Maastricht University Medical CenterThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 41 participants (actual)
Sponsor and investigators
- Lead sponsor
- Maastricht University Medical Center
- Sponsor type
- University, hospital or other
- Collaborators
- Eindhoven University of Technology
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07206251
- Sponsor's protocol ID
- ERB2024BE34
- Acronym
- FOIL
- Status last verified
- Jan 2026
- First submitted
- 20 Mar 2025
- Last updated
- 16 Jan 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Study is conducted by the researchers who will also process and analyse the data set anonymoously.
Study at a glance
From the registry record, last updated by the sponsor on 16 Jan 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of the Window Films on Cognition, Perception, and Health
- ClinicalTrials.gov ID
- NCT07206251
- Acronym / sponsor ID
- FOIL / ERB2024BE34
- Conditions
- Healthy
- Keywords
- Window Foil, Thermoregulation, Thermal Perception, Daylight, Saliva, Cognition
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 41 participants (actual)
- Lead sponsor
- Maastricht University Medical CenterUniversity, hospital or other
- Collaborators
- Eindhoven University of Technology
- Study start
- 26 Jul 2024 (actual)
- Primary completion
- 29 Oct 2024 (actual)
- Study completion
- 29 Oct 2024 (actual)
- First posted
- 3 Oct 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
To enable the Netherlands to reach the 2030 carbon emission goals, older homes need to be renovated to become more energy-efficient and comfortable. This project aims to provide shallow renovations of window films. These shallow renovations can be completed in 1-2 days and cost significantly less than a deep renovation. The study aims investigate how such window films can affect humans (low-e film and thermochromatic) if applicated in real life.
Detailed description
This study consists of one screening session (1.5 hours) and two testing sessions (5.5 hours each)
Screening session:
In the screening session, a questionnaire about general information as well as a medical questionnaire that asks about, current health status, lifestyle, morningness-eveningness chronotype, use of contraceptives, and sleep quality are completed. This data is necessary to assess the eligibility and to analyse the collected data with consideration of possible effect of lifestyle.
Testing sessions:
Subjects will be exposed to 2 different conditions (window film vs. no window film) in two days (11:15- 16:45) to assess the window film(s) influence on visual and temperature comfort, sensation and perception. The exposure rooms are low-e film room (film 1) or a thermochromic film room (film 2), compared with no film room (control). These films will be applied to windows. 2 cognitive cognitive tests, 2 vision tasks and fill in questionanires at set times are performed. Also wearable sensors as mentiond in Part 3 section 2 to measure their physiological parametersm suchs as skin temperature, heart rate and physical activity. Lastly, every hour a saliva sample by spitting into a tube to measure the cortisol level in the saliva is provided. Saliva is collected to measure cortisol changes caused by the environment. The samples are then stored immediately in a -20 freezer, after it is transported to the storage lab they will be centrifuged for 2 mins at 1000g and then stored in a
-80 freezer for the duration of the study until analysis. The storage room is secured and only the research team can assess the samples. When the samples are to be analyzed for cortisol, the sample is defrosted and tested by a spectrophotometer to quantify the amount of cortisol. The sample is then discarded after this analysis.
Study design
- Primary purpose
- Basic science
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Regular Windowed room (no foil added) | No intervention | –Regular Windowed room (no foil added) |
| Foiled Windowed room (foil added) | Experimental | Behavioral: Foiled Windowed room (foil added)Foiled Windowed room (foil added) |
Who may qualify
- Ages
- 18 to 40 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (5 listed)
- Generally Healthy Adult
- Ages between 18-40 years old
- Normal or correct vision (with use of glasses or contact lenses)
- Full vision
- Both males or females
Key exclusion criteria (5 listed)
- No Raynaud's syndrome
- No metabolic or cardiovascular diseases
- No ADHD or cognitive disorders
- No night shift work
- No colour blindness
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Foiled Windowed room (foil added)Foiled Windowed room (foil added) | Behavioural | Foiled Windowed room (foil added) |
Primary outcome
Cognitive Performance Scores
Time frame: 2 x in 5 hours test session both test days
Participants completed 2 cognitive battery tests (Creyos) during each test day at 2 different timepoints; one early afternoon, the other late afternon.
2 secondary outcomes
Skin Temperature
Time frame: every 1 min it is collected automatically over 5 hours test day and 2 test days
Visual Scale
Time frame: every 30mins to 1 hour over 5 hours test day and 2 sessions in total
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Jan 2026.
- Individual participant dataSharing planned: No. Study is conducted by the researchers who will also process and analyse the data set anonymoously.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Foiled Windowed room (foil added) in people with Healthy, run by Maastricht University Medical Center at 1 site in Netherlands.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 16 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Netherlands. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Cognitive Performance Scores (time frame: 2 x in 5 hours test session both test days). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Jan 2026.