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Portuguese residential ventilation regulations
Portaria n.º 138-I/2021,
de 1 de julho
Energy Performance and Ventilation in Buildings: A Summary of Standards and Regulations
This document presents a summary of the main standards and regulations related to energy performance and indoor air quality in buildings, focusing on Decree-Law 101-D/2020, Ordinance 138-I/2021 and the SCE Manual. Through the analysis of these laws, general obligations, ventilation requirements and energy calculation methodologies are addressed, in addition to the technical standards that guide natural and mechanical ventilation.
Decree-Law 101-D/2020 establishes the legal basis for energy performance in buildings, defining general obligations that include indoor air quality. This decree refers to the Ordinance 138-I/2021, which details the mandatory minimum values for ventilation in homes, and the SCE Manual, which complements the established guidelines.
General Obligations - Indoor Air Quality: The decree emphasizes the importance of maintaining indoor air quality, ensuring a healthy space for occupants.
Ordinance 138-I/2021 defines mandatory minimum values for ventilation in buildings, establishing that there must be at least 0.5 air changes per hour (h⁻¹).
Ventilation Requirements
The SCE Manual complements Ordinance 138-I/2021, offering an energy calculation methodology and technical guidelines for the certification of buildings. This manual is aligned with standards NP 1037-1 and NP 1037-2, which deal with natural and mechanical ventilation, respectively.
Methodology and Guidelines
The standards NP 1037-1 and NP 1037-2 are fundamental for regulating ventilation in buildings.
NP 1037-1: Natural ventilation in homes
NP 1037-2: Centralized Mechanical Ventilation (VMC)
Conclusion
The regulations and standards discussed in this document are essential to ensure energy efficiency and indoor air quality in buildings. Compliance with the guidelines established in Decree-Law 101-D/2020, in Ordinance 138-I/2021 and in the SCE Manual, together with standards NP 1037-1 and NP 1037-2, contributes to the creation of healthy and sustainable environments.
Desempenho Energético e Ventilação em Edificações: Um Resumo das Normas e Regulamentações
Este documento apresenta um resumo das principais normas e regulamentos relacionados ao desempenho energético e à qualidade do ar interior em edificações, com foco no Decreto-Lei 101-D/2020, na Portaria 138-I/2021 e no Manual SCE. Através da análise dessas legislações, são abordadas as obrigações gerais, os requisitos de ventilação e as metodologias de cálculo energético, além das normas técnicas que orientam a ventilação natural e mecânica.
O Decreto-Lei 101-D/2020 estabelece a base legal para o desempenho energético em edificações, definindo obrigações gerais que incluem a qualidade do ar interior. Este decreto remete à Portaria 138-I/2021, que detalha os valores mínimos obrigatórios para a ventilação em habitações, e ao Manual SCE, que complementa as diretrizes estabelecidas.
Obrigações Gerais - Qualidade do Ar Interior: O decreto enfatiza a importância de manter a qualidade do ar em ambientes fechados, garantindo um espaço saudável para os ocupantes.
A Portaria 138-I/2021 define valores mínimos obrigatórios para a ventilação em edificações, estabelecendo que deve haver pelo menos 0.5 renovações de ar por hora (h⁻¹).
Requisitos de Ventilação
O Manual SCE complementa a Portaria 138-I/2021, oferecendo uma metodologia de cálculo energético e orientações técnicas para a certificação de edificações. Este manual está alinhado com as normas NP 1037-1 e NP 1037-2, que tratam da ventilação natural e mecânica, respectivamente.
Metodologia e Orientações
As normas NP 1037-1 e NP 1037-2 são fundamentais para a regulamentação da ventilação em edificações.
NP 1037-1: Ventilação natural em habitações
NP 1037-2: Ventilação Mecânica Centralizada (VMC)
Conclusão
As regulamentações e normas discutidas neste documento são essenciais para garantir a eficiência energética e a qualidade do ar interior em edificações. O cumprimento das diretrizes estabelecidas no Decreto-Lei 101-D/2020, na Portaria 138-I/2021 e no Manual SCE, juntamente com as normas NP 1037-1 e NP 1037-2, contribui para a criação de ambientes saudáveis e sustentáveis.
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