A more recent version of this data set exists in the database.
Process information
| Key Data Set Information | |
| Location | GB |
| Geographical representativeness description | UK |
| Reference year | 2025 |
| Name |
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| Technical purpose of product or process | Ceiling swirl diffusers in air conditioning systems create a swirl to supply air to rooms. The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and room air. Ceiling swirl diffusers allow for large volume flow rates. The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone. Type SDW ceiling swirl diffusers have adjustable air control blades. The air pattern can be manually adjusted to meet different local requirements. Horizontal air discharge is one-way, two-way or omni directional. Vertical air discharge is possible but only for heating. The supply air to room air temperature difference may range from –12K to +10 K. To give rooms an aesthetic, uniform look, Type SDW diffusers may also be used for extract air. Air control blades are not required for extract air applications. QL border: 595x595 diffuser face suitable for exposed grid suspended ceiling systems (lay-in). Diffuser face made of galvanised sheet steel with polyester powder-coat finish from RAL Classic color range. For installations with constant and variable air flows up to 35 air changes per hour with a row of several diffusers, minimum distance between diffusers of 0.9 m (between central points). High induction, which leads to a rapid reduction in the temperature difference and air speed, ideal for comfort installations. This EPD includes the environmental data of the product series SDW-QL. The following represents a representative dataset of the most sold variant in the declared sales year (SDW-QL-Z/600x24/0/0/P3) with factors for alternative sizes. |
| Classification |
Class name
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Hierarchy level
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| General comment on data set | Data quality: Specific data for the product composition are provided by the manufacturer. The data represent the production of the declared product and were collected for EPD development in the year of study. Background data is based on EPDs according to EN 15804 and different LCA databases. The data quality of the raw materials in A1 is presented in the table below. Allocation: The allocation is made in accordance with the provisions of EN 15804. Energy, water and waste production in-house is allocated equally among all products through mass allocation. Effects of primary production of recycled materials is allocated to the main product in which the material was used. The recycling process and transportation of the material is allocated to this analysis. Cut-off criteria: All major raw materials and all the essential energy is included. The production processes for raw materials and energy flows with very small amounts (less than 1%) are not included. These cut-off criteria do not apply for hazardous materials and substances. |
| Copyright | Yes |
| Owner of data set | |
| Quantitative reference | |
| Reference flow(s) |
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| Biogenic carbon content |
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| Time representativeness | |
| Data set valid until | 2030 |
| Time representativeness description | 2025-10-13 - 2030-10-13 |
| Technological representativeness | |
| Technology description including background system | Nominal diffuser sizes: 300x8, 400x16, 500x24, 600x24, 600x48 Minimum volume flow rate, with dTz = -6K: 7 – 52 l/s or 26 – 186 m³/h. Maximum volume flow rate, with LWA 50 dB(A): 80 – 300 l/s or 288 – 1080 m³/h. Supply air to room air temperature difference: -12K to +10 K. For more technical data see: https://www.troxuk.co.uk/downloads/d50520965324a783/SDW_PD_2023_02_GB_en.pdf?type=product_info |
Modelling and validation
| Subtype | specific dataset | ||||
| LCA methodology report | |||||
| Data sources, treatment and representativeness | |||||
| Documentation of data quality management | |||||
| Data source(s) used for this data set | |||||
| Completeness | |||||
| Validation | |||||
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| Compliance Declarations | |||||
| Compliance |
Compliance system name
EN 15804+A2
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Approval of overall compliance
Fully compliant |
Nomenclature compliance
Fully compliant |
Methodological compliance
Fully compliant |
Review compliance
Fully compliant |
Documentation compliance
Fully compliant |
Quality compliance
Fully compliant |
| Compliance |
Compliance system name
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Approval of overall compliance
Fully compliant |
Nomenclature compliance
Fully compliant |
Methodological compliance
Fully compliant |
Review compliance
Fully compliant |
Documentation compliance
Fully compliant |
Quality compliance
Fully compliant |
| Compliance |
Compliance system name
|
Approval of overall compliance
Fully compliant |
Nomenclature compliance
Fully compliant |
Methodological compliance
Fully compliant |
Review compliance
Fully compliant |
Documentation compliance
Fully compliant |
Quality compliance
Fully compliant |
Administrative information
| Data generator | |
| Data set generator / modeller |
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| Data entry by | |
| Time stamp (last saved) | 2025-10-13T17:37:38 |
| Data set format(s) | |
| Publication and ownership | |
| UUID | 4be55df3-e6d6-4fcb-9c4d-0bc0d10c9453 |
| Date of last revision | 2025-08-22T12:26:58.5320733Z |
| Data set version | 00.03.000 |
| Registration authority | |
| Registration number | NEPD-12149-12121 |
| Owner of data set | |
| Copyright | Yes |
| License type | Free of charge for all users and uses |
| Access and use restrictions | None |
Environmental indicators
Indicators of life cycle