Peer Review Report For: Enhancing energy efficiency in tiny houses: The role of sustainable thermal insulation materials in Faiyum, Egypt [version 1; peer review: 1 approved with reservations, 2 not approved]

Résumé

Background According to “Data Bridge Market Research”, tiny houses are increasingly popular, encouraging people globally to downsize and minimize their ecological footprint. Egypt ranks as one of the nations listed in the worldwide tiny house industry, with a notable increase in interest from 2022 to 2029. This can be developed using sustainable, energy-efficient materials that enhance insulation and thermal comfort, making them an affordable and environmentally friendly option. The study aims to demonstrate how applying insulation to walls and roofs can facilitate a transition from unsustainable lifestyles to more sustainable, economical living, ultimately benefiting both individuals and the environment. Methods This study focuses on the concept of tiny housing, environmental sustainability, and guidelines that are applicable during any step of the design procedure. Four thermal insulation materials will be assessed with a passive design approach on a 40 square metre tiny house, with the help of “Design Builder” software, applied to the walls and roof to discover which material possesses the greatest energy efficiency while lowering the energy consumptions. Results Results showed that the base case scenario achieved 30.96% of the total hours feeling discomfort, and after applying the four insulative materials on a 40 square meters tiny housing, the cellulose insulation has proved to be the most effective one among the others in Faiyum, Egypt, experiencing 24.49% of the total hours being discomfort, with 20.92% highest reduction. PPD% has been examined as well for all four scenarios, proving that the cellulose insulation with a 52.36 PPD% showed a 12.28 PPD% reduction. Conclusion Given Egypt’s financial challenges, architects must prioritize thermal considerations and insulative materials in construction. This study evaluates thermal performance between a no-insulation case and four scenarios using common insulative materials to enhance thermal comfort in Fayium housing, Egypt.

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