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<p class="MsoNormal">This document specifies performance tolerances and the technical data presentation for fans of all types. It does not apply for fans designed solely for low-volume air circulation, such as those used for household or similar purposes (ceiling and table fans, extractor fans, etc.). For jet fans, refer to ISO 13350.</p>
<p class="MsoNormal">The upper limit of fan work per unit mass is normally 25 kJ/kg, corresponding to an increase of fan pressure of approximately 30 kPa for a mean density in the fan of 1,2 kg/m3. For higher values, agreement is to be reached between the supplier and the user.</p>
<p class="MsoNormal">This document applies the five installation categories defined in ISO 5801:</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>A<span style="mso-tab-count: 1;"> </span>free inlet, free outlet;</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>B<span style="mso-tab-count: 1;"> </span>free inlet, ducted outlet;</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>C<span style="mso-tab-count: 1;"> </span>ducted inlet, free outlet;</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>D<span style="mso-tab-count: 1;"> </span>ducted inlet, ducted outlet;</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>E<span style="mso-tab-count: 1;"> </span>free inlet and free outlet without a partition.</p>
<p class="MsoNormal">The performance of a fan can vary considerably with the installation category it is operating within. Therefore, these categories form an important part of the definition of the fan’s technical data presentation.</p>
<p class="MsoNormal">NOTE<span style="mso-tab-count: 1;"> </span>International acceptance of the five installation categories provides the opportunity to base a contract on the most appropriate fan category for the end user and the system designer. Correspondingly, the likelihood of the fan providing the agreed performance, without compromise or concession, is enhanced.</p>
<p class="MsoNormal">The efficiency scaling procedures described in 8.1.5 apply to centrifugal fans and axial fans within the specific speed ranges shown in Table 4. To date, there is no experimental data to confirm how they apply to mixed flow fans, having specific speeds in between.</p>
<p class="MsoNormal">Category E fans are treated in Clause 7.</p>
Reģistrācijas numurs (WIID)
87615
Darbības sfēra
<p class="MsoNormal">This document specifies performance tolerances and the technical data presentation for fans of all types. It does not apply for fans designed solely for low-volume air circulation, such as those used for household or similar purposes (ceiling and table fans, extractor fans, etc.). For jet fans, refer to ISO 13350.</p>
<p class="MsoNormal">The upper limit of fan work per unit mass is normally 25 kJ/kg, corresponding to an increase of fan pressure of approximately 30 kPa for a mean density in the fan of 1,2 kg/m3. For higher values, agreement is to be reached between the supplier and the user.</p>
<p class="MsoNormal">This document applies the five installation categories defined in ISO 5801:</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>A<span style="mso-tab-count: 1;"> </span>free inlet, free outlet;</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>B<span style="mso-tab-count: 1;"> </span>free inlet, ducted outlet;</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>C<span style="mso-tab-count: 1;"> </span>ducted inlet, free outlet;</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>D<span style="mso-tab-count: 1;"> </span>ducted inlet, ducted outlet;</p>
<p class="MsoNormal"><span style="mso-spacerun: yes;"> </span><span style="mso-tab-count: 1;"> </span>E<span style="mso-tab-count: 1;"> </span>free inlet and free outlet without a partition.</p>
<p class="MsoNormal">The performance of a fan can vary considerably with the installation category it is operating within. Therefore, these categories form an important part of the definition of the fan’s technical data presentation.</p>
<p class="MsoNormal">NOTE<span style="mso-tab-count: 1;"> </span>International acceptance of the five installation categories provides the opportunity to base a contract on the most appropriate fan category for the end user and the system designer. Correspondingly, the likelihood of the fan providing the agreed performance, without compromise or concession, is enhanced.</p>
<p class="MsoNormal">The efficiency scaling procedures described in 8.1.5 apply to centrifugal fans and axial fans within the specific speed ranges shown in Table 4. To date, there is no experimental data to confirm how they apply to mixed flow fans, having specific speeds in between.</p>
<p class="MsoNormal">Category E fans are treated in Clause 7.</p>
