Short answer

When designing naturally ventilated spaces, use adaptive thermal comfort models and consider how occupants might naturally adjust to their environment to achieve optimal comfort and satisfaction.

Field: Human Factors
Source: Buildings (2016)
Method: Comparative analysis and user surveys
Evidence: Strong effect

Occupants in naturally ventilated spaces adapt their thermal preferences to their environment, making adaptive comfort models more suitable than static ones. This human factors research insight is drawn from a 2016 study published in Buildings. Using Comparative analysis and user surveys, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing naturally ventilated spaces, use adaptive thermal comfort models and consider how occupants might naturally adjust to their environment to achieve optimal comfort and satisfaction.

Study

Human FactorsHigh ImpactStrong effect

Adaptive thermal comfort models outperform static PMV in naturally ventilated offices.

Occupants in naturally ventilated spaces adapt their thermal preferences to their environment, making adaptive comfort models more suitable than static ones.

Buildings · 2016

Key Findings

01Occupants in naturally conditioned buildings demonstrate a degree of adaptation to their local climate.
02Occupants tend to accept and prefer lower operative temperatures than predicted by the traditional PMV model.
03The adaptive thermal comfort model (CEN Standard EN15251) appears to be a more optimal approach for evaluating thermal comfort in naturally conditioned buildings.

Application

Design takeaway

When designing naturally ventilated spaces, use adaptive thermal comfort models and consider how occupants might naturally adjust to their environment to achieve optimal comfort and satisfaction.

How to apply

When designing or evaluating naturally ventilated buildings, use the adaptive thermal comfort model as a primary tool and supplement with occupant feedback to ensure comfort and satisfaction.

Project actions

01When investigating user comfort, consider how users might be adapting to their typical environment.
02Compare different comfort models to see which best reflects user experience in your specific design context.

Method & Evidence

AimWhich thermal comfort model, the adaptive CEN Standard EN15251 or the traditional PMV, is most suitable for evaluating naturally conditioned office spaces in temperate climates?

MethodComparative analysis and user surveys

ProcedureThe study compared the predictions of the adaptive thermal comfort model (CEN Standard EN15251) and the traditional PMV model against simultaneous occupant satisfaction surveys in a naturally ventilated office. Thermal data was collected to inform the model calculations.

ContextNaturally ventilated office building in a temperate climate zone (Quito, Ecuador).

Variables

IVThermal comfort model used (Adaptive vs. PMV)

DVOccupant thermal satisfaction

CVBuilding type (office), climate zone (temperate), ventilation strategy (natural)

Strengths & Limitations

Strengths

+Direct comparison of two prominent thermal comfort models.
+Inclusion of simultaneous user satisfaction surveys.

Limitations

The specific climate and cultural context of the study might influence occupant adaptation levels, so results may vary in different regions.

Reliability & validity

The use of simultaneous surveys and established comfort models enhances the validity. Reliability could be improved by longer study durations and larger sample sizes across diverse naturally ventilated buildings.

Think critically

To what extent do cultural factors, beyond just acclimatization, influence an occupant's thermal preferences in naturally ventilated spaces?

Design Principles

"Design for occupant adaptation by utilizing dynamic comfort models that account for environmental context and user behavior."

Understanding how occupants adapt to their thermal environment is crucial for designing buildings that promote well-being and productivity. This insight guides the selection of appropriate comfort evaluation methods, leading to more energy-efficient and user-centric designs.

What This Means for Your Design

People get used to the temperature where they live and work, so a 'one-size-fits-all' temperature rule doesn't work well for buildings that use natural airflow. An adaptive model that considers how people adjust is better.

How to use in your project

1.Reference this study when discussing the selection of thermal comfort models for naturally ventilated or passively conditioned spaces.
2.Use the findings to justify the use of adaptive models over static models in your design project's evaluation criteria.

Add to My Project

Quick Cite

Paragraph starter

Research indicates that occupants in naturally ventilated buildings develop adaptive behaviors, leading them to prefer temperatures different from those predicted by static models like PMV. The adaptive thermal comfort model, as outlined in CEN Standard EN15251, better accounts for these user adaptations, making it a more suitable tool for evaluating thermal comfort in such environments.

Source

Buildings

Evaluating Thermal Comfort in a Naturally Conditioned Office in a Temperate Climate Zone

journal · 2016

View source

Questions About This Research

What does the research say about adaptive thermal comfort models outperform static pmv in naturally ventilated offices?: When designing naturally ventilated spaces, use adaptive thermal comfort models and consider how occupants might naturally adjust to their environment to achieve optimal comfort and satisfaction. Evidence: Buildings (2016).
Why does "Adaptive thermal comfort models outperform static PMV in naturally ventilated offices." matter for design?: Understanding how occupants adapt to their thermal environment is crucial for designing buildings that promote well-being and productivity. This insight guides the selection of appropriate comfort evaluation methods, leading to more energy-efficient and user-centric designs.
How can designers apply this research?: When designing naturally ventilated spaces, use adaptive thermal comfort models and consider how occupants might naturally adjust to their environment to achieve optimal comfort and satisfaction.
What were the main findings?: Occupants in naturally conditioned buildings demonstrate a degree of adaptation to their local climate.. Occupants tend to accept and prefer lower operative temperatures than predicted by the traditional PMV model.. The adaptive thermal comfort model (CEN Standard EN15251) appears to be a more optimal approach for evaluating thermal comfort in naturally conditioned buildings.
What research method was used?: Comparative analysis and user surveys.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2016 journal from Buildings.
What should I do differently in my next project?: When designing or evaluating naturally ventilated buildings, use the adaptive thermal comfort model as a primary tool and supplement with occupant feedback to ensure comfort and satisfaction.
What are the limitations?: The study was conducted in a specific location with a particular climate and building type, which may limit generalizability to other contexts.