
The external unit is hooded to prevent weather ingress; the internal unit is inverted to deflect air supply upwards.
Boxes of 50
The 5000 GB Gas Board window slotvent has been designed specifically to meet the requirements for BS 5440 Part 2:2000 (specification for the installation of ventilation of gas appliances) which requires permanent supply of combustion air for heat producing appliances.
The external unit is hooded to prevent weather ingress; the internal unit is inverted to deflect air supply upwards.
Data sheet
Specific References