Features
and Benefits
Reduce Installed Cost By UpTo 20 Percent
TheTrane Model Q™ fan, with all its precision and quality, is still a cost effective fan. When all necessary system components are considered, it provides substantial installation cost savings. In addition, its small size and variable mounting positions allow more freedom to the designer and installer.
First Cost Comparisons
True first cost is the total cost of an operable installation. With theTrane Model Q, this consists of only the fan, drive and isolation. By comparison, the airfoil centrifugal typically requires these three components, plus an
Lower Installation Costs
TheTrane Model Q fan has fewer components to install and the advantage of lighter weight. With only half the weight of airfoil and tubular centrifugals, it requires less manpower for rigging and setting the fan in place. The result is reduced labor, with corresponding dollar savings on the typical job.
Lighter weight also reduces inertia pad requirements. With the Model Q, a pad has to be considered only on large
Class III fans. Airfoil and tubular centrifugals, because of greater weight, often require pads for Class I and II to minimize the effect imposed by normal vibration.
Combined Saving Significant
A comparison of average total installed cost is shown inTable
integral base. In addition, cost of isolation for the airfoil is greater because it is typically twice as heavy as the Model Q.
The common vaneaxial also requires more components in most applications. Besides the fan, drive and isolation, an inlet bell and diffuser are frequently necessary to meet cataloged performance. A sound attenuator is also required to reduce noise to a level equivalent to a Model Q fan without attenuation.
Table
| Standard | Trane | Tubular |
|
Item Required | Centrifugal | Model Q | Centrifugal | Vaneaxial |
First Cost Requirement |
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Fan | X | X | X | X |
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Belt Guard | X | X | X |
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Integral Base | X |
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Inlet Bell |
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| X |
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Attenuation |
|
|
| X |
Spring Isolators | X | X | X | X |
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Installation Cost Requirements |
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Rigging | X | X | X | X |
Install Attenuation |
|
|
| X |
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|
|
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Mount Motor (Etc.) | X |
| X |
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|
|
Install Isolation | X | X | X | X |
Average Total Installed Cost | X | +5 | +15 | |
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|
|
Comparison is based on equal size fans of similar capacities. The airfoil centrifugal fan is used as base (100%) for comparative purposes. Figures are based on estimates by experienced installing contractors.
Arrangement 9Trane Model Q fan requires purchase of motor, motor rails, belt guard and isolation in addition to the basic fan.
Arrangement 3 airfoil centrifugal fan requires purchase of motor, belt guard, motor slide rail, isolation and subbase in addition to basic fan.
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