Non-insulated air ducts Thermovent series

Semi-flexible stainless or galvanized steel spiral seam air ducts with high aerodynamic and strength characteristics.

Made of incombustible, corrosion-resisting stainless steel or galvanized steel band.
Increased thermal resistance (up to 700°С).
Superdense high-quality triple locks ensure high seam tightness and total air tightness of the ducts.
Low dynamic losses.
Low weight and easy mounting.

Applied in residential and industrial ventilation, air conditioning and heating systems with the maximum pressure 10 000 Pa.
For supply and exhaust ventilation.
Applied in the systems of hot air removal from boiler houses and smoke exhaust systems.

Item	Thermovent N, Zn	Thermovent N	Thermovent S
Diameter range [mm]	80/100/110/120/125/130/140/150/160/180/200/250/315
Material	Galvanized steel	Stainless steel	Stainless steel
Number of layers	1	1	1
Total thickness [μm]	80	80	100
Operating temperature range [°C]	-30 +700	-30 +700	-30 +700
Maximum air speed [m/s]	30	30	30
Maximum operating pressure [Pa]	10000	10000	10000
Minimum bend radius [mm]	3хD	3хD	3хD
Length [m]	1; 2; 3; 6	1; 2; 3; 6	1; 2; 3; 6

Select a curve that matches the air duct diameter [mm], 200 mm in this case.
Find the intersection point of this line with the vertical line of the required air flow in m³/h, 500 m³/h in this case.
The horizontal line that shows the pressure loss in Pa per 1 m straight air duct crosses this intersection point.
Multiply pressure loss value (2.4 Pa/m at 20°С) by total air duct length to get the total pressure loss value. To calculate pressure loss in case of bends consider each bend as extra air duct meter.