| Contrast of Air Duct Performances with Economic Indicators |
| Contrast of Air Duct Performances with Economic Indicators |
Unit |
Wide Extrusion Molding Phenolic Foam Air Duct |
Sheet iron Air Duct |
Glass Fiber Composite Air Duct |
Polyurethane Composite Aluminum Foil Air Duct |
| Heating conductivity |
w/m.k |
0.020-0.035 |
0.035-0.043 |
0.033 |
0.02-0.032 |
| Applicable temperature |
℃ |
-140——+150 |
-50——+80 |
—— |
-50——+120 |
| Volume Weight |
kg/m2 |
1.4(20mm thick) |
sheet iron 0.8mm thick, glass wool 25mm thick |
4~7(20mm thick) |
1.4(20mm thick) |
| Fireproofing Performance |
—— |
Grade B1 |
Glass wool grade A、rubber and plastic grade B2 or B1 |
Grade B1 |
Grade B1 or B2 |
| Oxygen Index |
% |
36~43 |
Rubber and plastic 20~32 |
32 |
≤32 |
| Grade of Smoke Density |
SDR |
4 |
Grade B1 60~75 |
—— |
50~75 |
| Material Water Absorption Rate |
% |
<0.5 |
1.5-3.0 |
1.5-3.0 |
<0.5 |
| Quantities |
m2/day |
20-30 |
4.0-5.0 |
15 |
20-30 |
| Mechanical Loss Rate |
% |
1 |
2.60 |
1 |
1 |
| Recycle Rate |
% |
60-80 |
0 |
60-80 |
60-80 |
| Service Life |
year |
20~30 |
Glass wool |
10~30 |
15-20 |
| Safety and Health |
—— |
Non-toxicity and innocuity, double-face composite Aluminum foil, used for cleaning air-conditioner |
Air duct is easy to rust and generate bacteria |
Easy to generate bacteria, adhered with adhesive, glass fiber fallen off, influence on air quality |
Non-toxicity and innocuity, double-face composite aluminum foil, used for cleaning air-conditioner |
| Manufacture and Installation |
—— |
Short construction cycle, high space utilization rate, convenient exposed and concealed installation and on-the-spot change |
Long construction cycle, low space utilization rate, complicated installation and difficult on-the-spot change |
Bad strength, most of them needs being reinforced, complicated installation and high space utilization rate |
Short construction cycle, convenient exposed and concealed installation and on-the-spot change |
| Repair and maintenance |
—— |
Convenient repair, optional pipe cutting, applicable toon-the-spot change and little waste |
Difficult repair, incapable of being reused during scheme modification after installation and serious waste |
Convenient repair, optional pipe cutting, applicable to on-the-spot change, glass fiber fallen off during cutting, pollution caused |
Convenient repair, optional pipe cutting, but bad rigidity, deformation after long-term use and bad repair result |
| Application Place |
—— |
Widely used for the places such as civil building, hotel, hospital, office building, marketplace, etc. |
Widely used, but short service life under high temperature environment |
Inapplicable to the places with dust control requirements, such as hospital, foodstuff processing shop, etc. |
Because it is difficult to reach fire control requirements, its use range is strictly restricted |