What is BS EN 12412-2 – Thermal transmittance of frames about?
BS EN 12412-2 is the second part of the BS EN 12412 multi-series on calculation and measurement methods for the design and evaluation of the thermal performance of buildings and building components.
BS EN 12412-2 specifies a method, based on ISO 8990 and ISO 12567-1, to measure the thermal transmittance of frame and sash components of windows and doors, including mullions and transoms.
The thermal bridging effect of window or door components (handles, hinges, closing devices, etc.) is included.
The test procedure is designed to take into account the whole developed area of the frame or sash surface, but excludes the influence of the thermal bridge introduced through the spacer in sealed glazing units.
The measurements are performed under defined conditions to facilitate the comparison of measured values.
Note: Edge effects occurring outside of the perimeter of the specimen are excluded. Furthermore, energy transfer due to solar radiation is not taken into account, and air leakage is excluded.
Who is BS EN 12412-2 – Thermal transmittance of frames for?
BS EN 12412-2 on determining thermal transmittance of window frames by hotbox method is useful for:
- Architects
- Civil engineers
- Real estate developers
- Interior designers
Why should you use BS EN 12412-2 – Thermal transmittance of frames?
Thermal transmittance is the quantity that indicates the quantity of thermal power exchanged by a material per unit of surface and the difference in temperature. Components with low thermal transmittance contribute to energy saving within the apartment as they exclude less heat from the room.
BS EN 12412-2 helps you to perform the hotbox method for determining the thermal transmittance of frames by providing you with a detailed account of its necessary apparatus requirements and step-by-step procedure. The method given in BS EN 12412-2 provides data on frames that can be used in calculations of the overall thermal performance of windows and doors.
In conclusion, by enabling you to determine the thermal transmittance of frames, BS EN 12412-2 helps you to improve the overall thermal performance of buildings and building components.