Sample calculation thermal loss:
Diameter: 520 mm
Insulation: 50 mm
Surface: 18,84 m²
Duct length: 10 m
Temperature difference: 30 K
| VENTAFLEX PUR rigid foam insulation | Spiral duct mineral wool insulation | Spiral duct rubber insulation | |
| Thermal transmission coefficient: | 0,022 W/mK | 0,038 W/mK | 0,040 W/mK |
| Thermal loss | 249 W | 430 W | 453 W |
Thermal loss = Thermal transmission coefficient x surface x temperature difference/ material thickness
At a glance
Structure of the material, insulation and thermal transmission value.
Download comparison of VENTAFLEX with conventional duct
Download topic heat permeability
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All air duct products, technical details, supplies and installation instructions can be found in our general catalog.
• Installation of VENTAFLEX air ducts with VENTASNAP and VENTAFIX
• Glueing of VENTAFLEX air ducts
• Installation of a compensator for the expansion compensation
• Laying the air ducts
• Length adjustment of air ducts
• Installation LAVANTUS ring seal
• Installation LavantusGrip