Roof fans - Troges
Roof fans - Troges
Roof fans - Troges
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NDH 71<br />
RF Fans<br />
Accessories<br />
Air pressure losses of all NDH roof adaptors<br />
Δp - Air pressure loss [Pa]<br />
4<br />
52<br />
5<br />
<br />
3<br />
7,7<br />
V - Air flow rate [m 3 /h]<br />
4500<br />
1<br />
<br />
<br />
2<br />
NDH 40<br />
NDH 56<br />
NDH 100<br />
v - Air flow velocity between splitters [m/s]<br />
The nomogram of pressure losses is valid for all NDH roof adaptors. For the selected air flow rate , the air<br />
flow velocity between the splitters of the NDH roof adaptor can be read in the lower graph, and then<br />
the corresponding air pressure loss of the NDH roof adaptor at the known velocity can be determined in<br />
the upper part .<br />
Example: At an air flow rate of 4,500 m 3 /h, the velocity of the air flow between the splitters of the NDH 60<br />
roof adaptor will be 7.7 m/s. The air pressure loss for the above-mentioned air flow rate will be 52 Pa.<br />
23
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