DIN V 18599-1 2018-09 PDF

Full title and description

Energy efficiency of buildings — Calculation of the net, final and primary energy demand for heating, cooling, ventilation, domestic hot water and lighting — Part 1: General balancing procedures, terms and definitions, zoning and evaluation of energy sources (DIN V 18599-1:2018-09).

Abstract

DIN V 18599-1:2018-09 defines the general methodology and balance equations used across the DIN V 18599 series to calculate net energy demand, delivered/final energy and primary energy for building services (heating, cooling, ventilation, domestic hot water and lighting). It provides common terms and definitions, describes the overall balance calculation method, gives guidance on zoning (division of a building into calculation zones) and lists primary energy factors and other factors for environmental assessment. The document serves as the normative basis for the remaining parts of the 18599 series.

General information

• Status: Originally published as a DIN V prestandard (active 2018) and later replaced by the updated DIN/TS 18599-1 published in October 2025 (i.e., the 2018 version has since been superseded by the 2025 DIN/TS revision).
• Publication date: 1 September 2018 (2018-09-01).
• Publisher: Deutsches Institut für Normung (DIN).
• ICS / categories: 91.120.10 (Thermal insulation of buildings), 91.140.01 (Installations in buildings in general).
• Edition / version: DIN V 18599-1:2018-09 (prestandard / vornorm).
• Number of pages: 99 pages (German language edition).

Scope

Specifies general balancing procedures and central equations used to assess building energy performance within the DIN V 18599 family. It covers definitions, the overall calculation method for net, final and primary energy demand, zoning rules (how to divide buildings into calculation zones), and the assessment of energy carriers (primary energy factors and CO2-equivalents). It is intended to be used together with the other parts of the DIN V 18599 series that provide detailed procedures for specific energy uses and systems.

Key topics and requirements

• Standardized balance equations for computing net, delivered (final) and primary energy demands for building services.
• Definitions and common terms used across the DIN V 18599 series to ensure consistent calculations.
• Zoning methodology — rules for dividing buildings into calculation zones and assigning internal gains and usage profiles.
• Specification of primary energy factors and factors for environmental assessment (CO2-equivalents) for energy carriers.
• Distinct provisions and notes for residential versus non‑residential building calculations (reference procedures and exceptions).
• Normative references and structure to be used with subsequent parts (net energy for heating/cooling, ventilation, DHW, lighting, system-level delivered energy).

Typical use and users

This part is used by energy modelers, building physicists, HVAC engineers, energy consultants, architects and authorities performing energy performance calculations, compliance checks and energy labeling. It is used as the foundational reference when implementing the DIN V 18599 calculation chain in software tools or when performing hand calculations that feed into the other parts of the series. It is also referenced in professional training, energy audits and regulatory compliance where the 18599 methodology is required or chosen.

Related standards

Part 1 is the general (foundation) part of the DIN V 18599 suite. Other related parts include (but are not limited to) Parts 2–10 which address net energy demand for heating/cooling, air conditioning, lighting, domestic hot water, and final energy of plant and system components. The 2018 V‑series was updated to DIN/TS versions in October 2025, replacing the 2018 prestandards across multiple parts. Users commonly consult the corresponding DIN/TS 18599 parts (2025) and complementary national and European standards used for building energy performance assessments.

Keywords

energy efficiency, building energy, net energy demand, final energy, primary energy, heating, cooling, ventilation, domestic hot water, lighting, zoning, primary energy factors, DIN V 18599, energy balance, building services.

FAQ

Q: What is this standard?

A: DIN V 18599-1:2018-09 is Part 1 (general procedures) of the DIN V 18599 family of prestandards for calculating net, final and primary energy demands of buildings; it defines the basic balance methods, terminology and zoning rules used across the series.

Q: What does it cover?

A: It covers the overall balance equations and calculation methodology, common terms and definitions, zoning (how to subdivide a building for calculation), and the assessment of energy carriers (primary energy factors and CO2-equivalents). It does not by itself contain the full detailed procedures for each technical system — those are provided in the other parts of the series.

Q: Who typically uses it?

A: Energy modelers, HVAC and building services engineers, consulting energy assessors, architects involved in compliance and certification, software developers implementing 18599 calculation engines, and regulatory bodies that reference the 18599 methodology.

Q: Is it current or superseded?

A: The 2018 V‑version was a valid prestandard when published (1 September 2018) but has been superseded by a revised DIN/TS 18599 series published in October 2025; users doing regulatory compliance or new assessments after that date should check whether national regulations or clients require the newer DIN/TS 18599 (2025) texts.

Q: Is it part of a series?

A: Yes — it is Part 1 of the DIN V 18599 suite; related parts (Parts 2–10 and associated supplements) specify the detailed procedures for heating/cooling, air‑conditioning, lighting, DHW, system-level final energy and more. The entire series was updated to DIN/TS editions in October 2025.

Q: What are the key keywords?

A: energy balance, net energy demand, final energy, primary energy, building zoning, primary energy factors, heating, cooling, ventilation, domestic hot water, lighting, DIN V 18599.