Low noise level
Adjustable voltage control
Supply-air unit with heater
Easily removable inspection cover
A compact unit consisting of a fan, heater and filter in a galvanised sheet steel casing insulated inside with 50 mm of mineral wool. Rubber-sealed sleeve couplings. Neoprene sealing strips and toggle locks. Note that the fan must always be connected to 230 V. Fan run-on is not normally required. (Lowest air velocity 1.5 m/s). Max. output air temperature: 40 °C. The fan may be adjusted by either a transformer or a thyristor.
The heating element is most effectively controlled by a power regulator, pulser and duct sensor.
The filter should be checked regularly and replaced at least twice a year.