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Benefits of 4-Seasons

High quality formply

Opens in 2 stages

Perfectly insulated

Rolling air effect

Common models

Type Installation dimensions Net surface Capacity
W H D 10 Pa 20 Pa 30 Pa
VIER3000 600 mm 330 mm 200 mm 1410 cm2 2100 (m3/hr) 3000 (m3/hr) 3700 (m3/hr)
VIER4000 700 mm 360 mm 200 mm 1860 cm2 2800 (m3/hr) 4000 (m3/hr) 4900 (m3/hr)
VIER5000 800 mm 390 mm 200 mm 2370 cm2 3600 (m3/hr) 5000 (m3/hr) 6200 (m3/hr)

Air control with 4 Seasons side air inlet

The 4 Seasons side air inlet is characterized by a fixed hinge point. The body is made of high quality formply and the vent is well insulated and has absolutely no cracks. This makes the 4 Seasons side air inlet a very solid, simple and reliable side air inlet that has been proving its worth for 20 years.

The vent of the 4 Seasons side air inlet opens at the top first and sends the air straight into the barn. When the upper part of the vent is open 10 – 15%, the lower part will also open. This deflects the incoming air downward, creating a gentle rolling effect and optimally directing the air to the right part of the barn.

4 Seasons side air inlet installation dimensions

All 4 Seasons side air inlets have a formply body and are available in any size. The opening in the wall should be 6 mm larger than the formply body. For concrete barns, we make custom-made embedded frames.