Retractable door seal, Kältefeind Allround, Athmer
- Protection against cold, draught and vermin
- Reduces light leakage
- smoke control
- Fire resistance
- Safes energy of air conditioning systems (see following example)
Area of application
Example calculation of energy savings:
Door width 960 mm,
pressure difference between indoor and outdoor 10 Pa,
room temperature 25°C and relative humidity of 90 %,
outdoor temperature 35°C and relative humidity of 70 %,
floor gap 7 mm
Without seal: leakage rate approx. 41 m3/h
With seal: leakage rate under 2 m3/h
The area of application in which the door is used is mainly governed by the sealing profile material (PVC or silicone). High quality, self-extinguishing silicone seals are used for fire resistant and smoke control doors.
Retractable door seals are available with single-side or double-side release mechanism. Seals with single-side release (with double doors) are released on the hinge side or on the lock side, depending on the model. Double-side release always means release at the hinge side and at the lock end. With double-side release seals, the sealing profile is raised and lowered faster, which prolongs its life time considerably.
The sealing profile is pressed automatically against the floor or engages with a threshold as the door is closed.
Automatic door seals can be distinguished between retractable door seals and sill seals.
Sill seals are always used in combination with a threshold, it is, however, recommended to use retractable door seals also in combination with a threshold in case of carpet fitted floors or butt joints with different floor coverings.
Automatic door seals can be fitted in different ways depending on the model and application.
Full mortice fitted, With mounting bracket
Full mortice fitted and face fixed
Plug-fitted and/or glue fixed (glass)