ISO 17772-1:2017

Overview

ISO 17772-1:2017 - Energy performance of buildings: Indoor environmental quality (Part 1) defines the input parameters for assessing and designing building energy performance with respect to the indoor environmental quality (IEQ). Rather than prescribing design methods, this standard specifies the thermal environment, indoor air quality (IAQ), lighting and acoustics parameters and how to establish them for building system sizing and energy calculations. It is applicable where indoor environment criteria are driven by human occupancy (not dominated by industrial processes) and is intended for use in energy simulations, national calculation methods and monitoring.

Why it matters: IEQ choices (ventilation rates, temperature setpoints, lighting levels, noise limits) strongly influence building energy use, occupant comfort, health and productivity. ISO 17772-1:2017 provides a consistent set of input parameters to balance energy performance with occupant needs.

Key Topics and Requirements

• Thermal environment: Input parameters for heating and cooling seasons, treatment of naturally ventilated and mechanically cooled buildings, and local thermal discomfort factors such as draught, radiant temperature asymmetry, vertical air temperature differences and floor surface temperature.
• Indoor air quality (IAQ) and ventilation rates: Methods to establish ventilation design values, guidance for residential and non-residential buildings, filtration/air cleaning and criteria for low/very-low polluting buildings.
• Lighting: Criteria and input parameters for energy calculations and design for both residential and non-residential spaces.
• Acoustics (noise): Indoor system noise criteria for different spaces and their use in energy-related assessments.
• Occupant schedules and usage profiles: Standard occupancy schedules for seasonal, monthly and hourly energy calculations (see Annexes G, N, O).
• Humidity and monitoring: Parameters for humidity control and recommendations for monitoring and display of IEQ variables.
• Annexes: Normative and informative annexes provide recommended criteria (Annex A), IAQ basis (Annex B/I), pollutant criteria (Annex F/M), examples for lighting and noise, and sample occupant schedules.

Practical Applications and Users

Who should use ISO 17772-1:2017:

• HVAC and building services engineers for system sizing and commissioning input
• Energy modelers and simulation analysts who need standardized IEQ inputs
• Architects and façade designers to set envelope and thermal comfort targets
• Sustainability consultants and building certifiers using national or EU EPB frameworks
• Facility managers and building operators for monitoring and performance evaluation Practical uses include establishing simulation inputs, setting design criteria that align occupant comfort with energy targets, defining ventilation strategies, and informing national calculation methods.

Related Standards

• ISO 52000-1 (energy performance of buildings - EPB framework)
• ISO 7730 (thermal comfort standards referenced for basis)
• WHO health-based indoor air guidance (referenced in Annex M) ISO 17772-1:2017 complements existing thermal comfort, ventilation and EPB standards by providing consistent IEQ input parameters for energy performance calculations.