The 4-Seasons air inlet is robust, simple and reliable and serving Tulderhof already for more than 20 years.
The 4 Seasons air inlet is robust, simple and reliable and serving Tulderhof already for more than 20 years.
The frame is constructed out of the highest quality plywood. The valve has a fixed hinge point and is very well insulated with 15 mm insulation foam. This foam also ensures a proper closing at the edges. Therfore the 4-Seasons air inlet is absolutely draught free.
The air flow is as following: when the valve opens, the air can only pass above. This way it steers quite straight into the house. After 10 to 15% the valve opens underneath as well. The air is then deflected downwards, creating a nice rolling effect.
| Type | 4S – 3000 | 4S – 4000 | 4S – 5000 |
|---|---|---|---|
| 10 Pa – m3/u | 2,100 | 2,800 | 3,600 |
| 20 Pa – m3/u | 3,000 | 4,000 | 5,000 |
| 30 Pa – m3/u | 3,700 | 4,900 | 6,200 |
| Surface cm2 | 1,410 | 1,860 | 2,370 |
| Width – mm | 600 | 700 | 800 |
| Height – mm | 330 | 360 | 390 |
| Depth – mm | 150 | 170 | 170 |
Installation size
All 4 Seasons air inlets are made of the highest quality plywood and therefore deliverable in many different sizes. The hole in the wall should be 6 mm bigger than the outer size of the frame.
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