BS EN 12412-2:2003 – Thermal performance of windows, doors and shutters — Determination of thermal transmittance by hot box method — Part 2: Frames

1 Scope
This European Standard specifies a method, based on EN ISO 8990 and EN 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.
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.
The measurements are performed under defined conditions to facilitate the comparison of measured values.
Information on the design of the calibration transfer standard is given in EN ISO 12567-1.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments).
EN 1946-4, Thermal performance of building products and components – Specific criteria for the assessment of laboratories measuring heat transfer properties – Part 4: Measurements by hot box methods.
prEN 12519:1996 : , Windows and doors – Terminology.
EN 12664, Thermal performance of building materials and products – Determination of thermal resistance by means of guarded hot plate and heat flow meter methods – Dry and moist products of medium and low thermal resistance.
EN ISO 7345:1995, Thermal insulation – Physical quantities and definitions (ISO 7345:1987).
EN ISO 8990:1996, Thermal insulation – Determination of steady-state thermal transmission properties – Calibrated and guarded hot box (ISO 8990:1994).
EN ISO 9288:1996, Thermal insulation – Heat transfer by radiation – Physical quantities and definitions (ISO 9288:1989).
EN ISO 12567-1:2000, Thermal performance of windows and doors – Determination of thermal transmittance by hot box method – Part 1: Complete windows and doors (ISO 12567-1:2000).
BS EN 12412-2:2003 – Thermal performance of windows, doors and shutters — Determination of thermal transmittance by hot box method — Part 2: Frames