Frame heaters are used for air heating in ventilation and air-conditioning installations. The heaters consist of:
-inner frame with collars fitted for connection with ventilation channels -heating elements with rolled aluminium ribbing with external diameter of an element D=28 mm and ribs spacing s=2,8 mm

Series of types of the heaters includes 6 sizes with intake surface from 0,157 m² to 1,6 m², offered as two- or three- row heaters.The construction of the heaters allows for joining them in four-, five- row sets.
The heater consists of:
- internal frame with collars fitted for connection with ventilation channels
- heating elements made of bimetallic highly-ribbed pipes, i.e.
- steel pipes with aluminium ribbing rolled in a spiral way
- collectors with connectors

Heaters are used for air heating in ventilation and air-conditioning installations.