Table 1 National and Shandong provincial policies and technical guidelines for ultra-low energy residential buildings.

From: Parametric analysis of passive ultra-low energy building envelope performance in existing residential buildings

Level

Year

Document title

Key contents

National

2015

Technical guidelines for passive ultra-low energy green buildings (residential)

Defined features of ultra-low energy green buildings; established energy consumption and air tightness indicators; provided technical guidance, acceptance criteria, and evaluation standards

2019

Technical standard for zero energy buildings

Comprehensive regulations for ultra-low energy building technologies, including indoor environmental parameters, energy efficiency metrics, and building air tightness

Shandong

2016

Design standard for passive ultra-low energy residential buildings

Regulated building envelope design, thermal bridge-free design, air tightness design, shading design; provided calculation methods for heating, cooling, and primary energy demand

2023

Guidelines for high-quality residential development in Shandong (2023)

Promoted refined construction and meticulous management; implemented green and healthy, smart technology, and age-friendly development concepts and standards

Qingdao

2020

Special plan for green buildings and ultra-low energy residential development in Qingdao (2021–2025)

Advanced high-quality development of green buildings, ultra-low energy buildings, and prefabricated buildings; outlined development goals and measures