Gælder det den nemmeste ind- og udluftning, er her tale om de helt rigtige rørventilatorer.
 
- plastikindkapsling
- styrbare omdrejningstal
- mororbeskyttelse via indbyggede termokontakter
- rør- og slangemontage
- driftssikker og nem et holde

The RVK series is designed for installation in ducts.The fans have backward-curved blades and external rotor motors. The FK mounting clamp facilitates easy installation and removal, and prevents the transfer of vibration to the duct. The fans can be speed-controlled via a stepless thyristor or a 5-step transformer.
The RVK fans have integral thermal contacts with automatic reset. The casing is manufactured from fibreglass reinforced plastic.