Short answer

Integrate the Iwan architectural feature into building designs in hot-dry climates to optimize natural light and occupant comfort.

Field
Classic Design
Source
Iranica Journal of Energy and Environment (2023)
Method
Simulation-based analysis
Evidence
Strong effect

Incorporating traditional Iwan architectural elements can significantly improve natural light penetration and visual comfort in adjacent rooms, while mitigating glare and unwanted solar heat gain. This classic design research insight is drawn from a 2023 study published in Iranica Journal of Energy and Environment. Using Simulation-based analysis, researchers explored how this design variable affects real-world outcomes. The key design takeaway: Integrate the Iwan architectural feature into building designs in hot-dry climates to optimize natural light and occupant comfort.

Study
Classic DesignRecentStrong effect

Iwan architectural feature enhances daylighting and reduces glare in hot-dry climates

Incorporating traditional Iwan architectural elements can significantly improve natural light penetration and visual comfort in adjacent rooms, while mitigating glare and unwanted solar heat gain.

Iranica Journal of Energy and Environment · 2023

01

Key Findings

  • 01Iwan depth and window-to-wall ratio (WWR) significantly influence daylight levels in adjacent rooms.
  • 02Iwan depths of 1.5 meters or greater, combined with window WWRs between 20% and 60%, provide suitable daylighting.
  • 03The Iwan design allows for wider windows without causing glare or excessive thermal load.
02

Application

Design takeaway

Integrate the Iwan architectural feature into building designs in hot-dry climates to optimize natural light and occupant comfort.

How to apply

When designing buildings in hot-dry regions, consider incorporating Iwan features and analyze the optimal balance between Iwan depth and window size for effective daylighting.

Project actions

  • 01Investigate traditional architectural features in your local climate.
  • 02Use simulation software to test different design variations.
  • 03Consider both visual comfort and thermal performance.
03

Method & Evidence

AimTo investigate the impact of Iwan proportions and adjacent room window-to-wall ratio (WWR) on daylighting performance in hot-dry climates.
MethodSimulation-based analysis
ProcedureComputer simulations were conducted using Design Builder software to model various Iwan depths and window sizes in residential courtyard buildings. Daylight metrics such as Useful Daylight Illuminances (UDI) and Spatial Daylight Autonomy (sDA) were analyzed.
ContextResidential courtyard buildings in Yazd City (hot-dry climate)

Variables

IV["Iwan depth","Window-to-wall ratio (WWR)"]
DV["Useful Daylight Illuminances (UDI)","Spatial Daylight Autonomy (sDA)"]
CV["Location (Yazd City)","Building type (residential courtyard)","Simulation software"]
04

Strengths & Limitations

Strengths

  • +Utilizes simulation software for controlled analysis.
  • +Focuses on climate-specific design solutions.
  • +Investigates both visual and thermal implications.

Limitations

Physical models may not perfectly replicate complex light interactions. Environmental conditions during testing can vary.

Reliability & validity

The use of simulation software provides a controlled environment, enhancing reliability. Validity is supported by the use of established daylighting metrics (UDI, sDA). However, real-world validation would strengthen these aspects.

Think critically

How might the findings of this study be adapted for different climatic zones, and what other traditional architectural features could offer similar benefits?

05

Design Principles

"Leverage traditional architectural elements for contemporary passive design solutions."

This research demonstrates how historical architectural strategies can be re-evaluated and applied to contemporary design challenges. By understanding the interplay between an Iwan's depth and window proportions, designers can create more sustainable and comfortable built environments, reducing reliance on artificial lighting and cooling.

06

What This Means for Your Design

Old-fashioned covered porches called 'Iwans' can help make rooms brighter and cooler by letting in good light and blocking bad sun.

How to use in your project

  • 1.Reference this study when discussing the benefits of passive design strategies or the reinterpretation of traditional architectural elements in your design project.
07

Add to My Project

08

Quick Cite

Paragraph starter

This research highlights the effectiveness of traditional architectural elements, such as the Iwan, in enhancing daylighting and mitigating glare in hot-dry climates. By analyzing the interplay between Iwan depth and window-to-wall ratios, it provides a quantifiable basis for re-integrating such features into contemporary sustainable design practices, leading to improved visual comfort and reduced energy consumption.

09

Source

Iranica Journal of Energy and Environment

Effect of Window Area and Proportions of Iwan on Daylight in Adjacent Room: An Investigation in Yazd City

journal · 2023

View source

Questions About This Research

What does the research say about iwan architectural feature enhances daylighting and reduces glare in hot-dry climates?
Integrate the Iwan architectural feature into building designs in hot-dry climates to optimize natural light and occupant comfort. Evidence: Iranica Journal of Energy and Environment (2023).
Why does "Iwan architectural feature enhances daylighting and reduces glare in hot-dry climates" matter for design?
This research demonstrates how historical architectural strategies can be re-evaluated and applied to contemporary design challenges. By understanding the interplay between an Iwan's depth and window proportions, designers can create more sustainable and comfortable built environments, reducing reliance on artificial lighting and cooling.
How can designers apply this research?
Integrate the Iwan architectural feature into building designs in hot-dry climates to optimize natural light and occupant comfort.
What were the main findings?
Iwan depth and window-to-wall ratio (WWR) significantly influence daylight levels in adjacent rooms.. Iwan depths of 1.5 meters or greater, combined with window WWRs between 20% and 60%, provide suitable daylighting.. The Iwan design allows for wider windows without causing glare or excessive thermal load.
What research method was used?
Simulation-based analysis.
How strong is the evidence?
Evidence strength is rated Strong effect, based on a 2023 journal from Iranica Journal of Energy and Environment.
What should I do differently in my next project?
When designing buildings in hot-dry regions, consider incorporating Iwan features and analyze the optimal balance between Iwan depth and window size for effective daylighting.
What are the limitations?
The study is specific to the climate of Yazd City and may require adaptation for different environmental conditions. Simulation results are dependent on the accuracy of the software and input parameters.