The quotations for FFU with the same specifications are quite different. Which configurations should be compared when purchasing?

It is also a 1200×600mm FFU. Why are there obvious differences in the quotations of different manufacturers? Some buyers found that the two quotations both said 'HEPA filtration, adjustable speed, rated wind speed 0.45m/s, but the prices were different. The problem is usually not that one manufacturer is necessarily better, but that 'same specifications' may only refer to external dimensions or surface parameters, and may not necessarily mean that the fan operating point, filter resistance, box structure, control function, testing content and delivery scope are completely consistent.

If you only sort by unit price, you may compare products with different technical conditions as the same configuration. For procurement projects involving hundreds, thousands or even tens of thousands of FFUs, this difference will be further amplified by installation, operation, inspection and long-term maintenance.

It is recommended to check the quotation according to the 'same technical working conditions → the same component configuration → the same control range → the same testing standard → the same delivery conditions' and finally compare the prices.

1. If the quotation of FFU with the same specifications is different, you must first confirm what 'same specifications' means.

The 'specifications' in the manufacturer's quotation sometimes only include the overall dimensions, power supply and filtration level, but what really needs to be compared when purchasing is the complete machine configuration under the agreed operating conditions. For example, two FFUs with the same cabinet appearance and H14 filters are equipped with H14 filters. If the rated air volume and initial resistance of the filters are different, the required working points of the fans and motors may be different. In addition, due to different control methods and testing requirements, the quotations should not be directly equivalent.

Aili Industrial supporting advantages: Aili Industrial's FFU selection communication will coordinate the target air volume, static pressure, filter resistance, installation structure and control method under the same project conditions, making it easier for buyers to clarify the actual comparison boundaries. For product introduction, please refer to: [Aili Industrial FFU fan filter unit](https://ailigy.com/ffu.html )

2. Why do fans and motors affect FFU quotations?

Fans and motors: Compare operating points, not just power

Fans and motors not only affect the purchase cost, but also affect whether the FFU can achieve the target air volume under the specified resistance, as well as the input power, speed range, noise and operating status. You cannot judge whether two solutions are equivalent based on 'how many watts' or 'AC or EC'.

·        Rated operating conditions: Confirm the air volume and static pressure when the FFU complete machine is equipped with the specified filter, not the no-load maximum air volume of the fan.

·        Drive configuration: The specific drive, control and energy consumption performance of AC, DC, and EC solutions should be compared under the same operating conditions.

·        Operating gear: For the two modes of work/duty, confirm the air volume and power requirements of different gears.

·        Subsequent replacement: Confirm the spare parts specifications and maintenance responsibilities of fans, motors and drives.

Aili Industrial Supporting Advantages: Aili Industrial has the capability of independent R&D and manufacturing of motors and independent R&D and production of fans. It can check the complete machine plan based on the fan working point, filter resistance and target wind speed. When purchasing, you can ask each manufacturer to submit air volume, power and operating status data under the same working conditions to avoid judging the price of the quote based on motor power alone.

3. If H14 is also marked, does the HEPA/ULPA configuration have to be the same?

Filter Comparison: Rating, Resistance, Sealing & Testing

uncertain. Filter rating is only one of the criteria. For the same H14 configuration, the rated air volume, initial resistance, filter material, frame, thickness, sealing structure and inspection documents should also be checked. If the project is changed to U15 or higher, the filter resistance change and fan matching must also be confirmed simultaneously.

Aili Industrial Supporting Advantages: Aili Industrial has the ability to manufacture HEPA/ULPA air filters and complete FFU/EFU machine supporting capabilities, and can simultaneously check filter resistance, size, sealing and fan parameters. Related filter products: [Aili Industrial HEPA/ULPA Filter](https://ailigy.com/HEPA-ULPA-air-filter.html )

4. How do the cabinet material, installation interface and maintenance methods affect the price?

Box, seal, installation interface and maintenance methods

For clean projects, the box material and installation structure are not just different in appearance. For example, conventional cabinets and stainless steel cabinets, ordinary installation and flanged structures, top inspection and bottom-down maintenance may involve differences in materials, sheet metal, assembly and sealing costs. Non-standard hole positions, special surface treatments and height-restricted designs also need to be checked separately.

·        Box material: galvanized steel plate, stainless steel, etc. The actual grade, thickness and surface treatment conditions need to be stated.

·        Connection method: Ceiling installation, flange size, mounting hole position, and sealing interface must be consistent with the drawings.

·        Maintenance methods: The direction of filter disassembly and assembly, top inspection space and subsequent replacement methods must be included in the quotation range.

·        Equipment-side products: Ultra-thin EFU, small-size structures, etc. should be evaluated individually based on the air inlet clearance and equipment installation conditions.

Aili Industrial supporting advantages: Aili Industrial has sheet metal processing and complete machine assembly capabilities, and can check the structure, interfaces, filter installation and fan configuration based on equipment drawings. For equipment-side requirements, please refer to: [Aili Industrial EFU equipment-side products](https://ailigy.com/efu-fan-filter-unit.html )

5. The control methods are different. Why can’t the two FFU quotations be directly compared?

Control scheme: single machine speed regulation and group control range

Single machine switching or speed regulation, regional centralized control, computer group control and special equipment linkage involve different electrical and software work scopes. Some quotations only include the FFU body and basic speed control, while the group control controller, communication accessories, wiring, software or debugging may be priced separately. Therefore, when inquiring, you should clarify 'which functions are included, which equipment is included, and which services are not included.'

It should be noted that RJ45 only describes the interface form and does not automatically prove that the communication protocol is consistent; the group control solution cannot only judge the technology and quotation range based on the words 'support centralized control'.

Aili Industrial supporting advantages: Aili Industrial has the ability to develop FFU control system software and hardware, and can discuss suitable solutions based on project scale and control functions. Related system pages: [Aili Industrial FFU Group Control System](https://ailigy.com/ffu-group-control-system.html )

6. Differences in testing and quality records will also cause differences in quotations.

The consistency of inspection items and batches cannot be based solely on verbal promises.

For FFUs that are also marked 'factory qualified', the test items, data records and acceptance basis provided by the supplier may be different. You need to first confirm which agreed testing and quality documents are included in the quotation before judging the unit price. Verification at the prototype stage, factory inspection of batch products and on-site system acceptance in clean rooms should be distinguished and cannot be confused.

·        Air performance: Whether the air volume, wind speed, power and test conditions are clear.

·        Filter and seal: Filter inspection data, installation status inspection and whether the boundaries of special leak detection are clear.

·        Electrical and control: How to verify start-stop, speed regulation, communication and agreed functions.

·        Quality traceability: Whether batch identification, inspection records and key configuration version management are included in the requirements.

Aili Industrial supporting advantages: Aili Industrial covers core component manufacturing, complete machine assembly and corresponding testing links, and can discuss prototype verification, factory inspection and delivery document requirements during the technical confirmation stage; the specific execution scope is subject to the confirmed specifications and technical agreement.

7. Bulk purchasing cannot only compare single unit quotations, but also depends on delivery and subsequent use costs.

For hundreds, thousands or larger FFU projects, the quotation not only involves the equipment itself, but may also include prototypes, non-standard designs, batch packaging, logistics, group control supporting equipment, on-site debugging and subsequent spare parts. For clean rooms with long running times, power differences and filter replacement methods may also affect long-term use costs. However, whether energy saving should be based on actual measurements or valid technical data under the same working conditions, rather than general publicity.

Total procurement cost verification idea: equipment purchase price + clear ancillary control and engineering costs + transportation and installation + energy consumption under agreed operating conditions + maintenance and spare parts.

This is not a requirement that buyers must calculate all life cycle costs at once, but rather a reminder of items that are clearly not included in the technology comparison and contract boundaries.

Aili Industrial Supporting Advantages: Aili Industrial has a 30,000 square meter manufacturing base. The manufacturing system covers motors, fans, control systems, air filters, sheet metal and complete machine assembly. It can collaboratively evaluate batch supporting solutions based on specific models, control scope and delivery requirements. The actual production capacity, delivery time, energy consumption and price are subject to the project verification results.

8. FFU quotation comparison table that buyers can directly copy

Verification of quotations with the same conditions: technical deviation, delivery scope and total cost

It is recommended that different manufacturers quote quotations based on the same version of technical parameters and the same delivery conditions, and require separate items that 'conform', 'deviate', and 'not include'. This makes it easier to find differences than directly asking each manufacturer to quote a minimum price.

9. Frequently Asked Questions (FAQ) about FFU quotation comparison

1. The appearance and dimensions of FFU are the same, why are the prices different?

Because the fan motor, filter resistance, material, control, testing and after-sales range may be different. You should first unify the working conditions of the entire machine and then compare prices.

2. Both FFUs write H14, can I compare prices directly?

Not recommended. Also check rated air volume, initial resistance, filter media, size, sealing and testing requirements.

3. Is EC FFU definitely more energy efficient than AC FFU?

Don't draw conclusions based on the driver name alone. It is necessary to compare the input power of the whole machine under the same air volume, static pressure and operating mode, and consider the specific drive configuration.

4. Does the quote 'support group control' mean that the control system is included?

Doesn't mean. It needs to be clarified whether the controller, communication hardware, software, wiring and debugging are included in the quotation.

5. How to avoid subsequent additional fees when purchasing FFU in bulk?

Clarify the technical version, testing requirements, non-standard interfaces, delivery batches and excluded items before the contract, and compare the solutions under the same conditions.

6. Can Aili Industrial provide a quotation for FFU packages?

The selection and matching of FFU/EFU can be discussed based on the drawings, air volume, filtration level, control method and quantity. The specific price and delivery date are subject to the confirmed plan.

10. Why can buyers include Aili Industrial in the price comparison range of FFU suppliers?

Aili Industry is an enterprise engaged in the research, development and manufacturing of clean air equipment, with a manufacturing base of 30,000 square meters. The business manufacturing system covers motor R&D and manufacturing, independent R&D and production of fans, control system software and hardware development, HEPA/ULPA filter manufacturing, sheet metal processing, and FFU/EFU complete machine assembly and testing.

The value of these manufacturing supporting capabilities is that buyers can coordinate the fan working point, filter resistance, box structure and control functions around the same set of technical conditions, and check non-standard solutions, prototype verification, batch testing and delivery scope according to project requirements.

If you are comparing quotations from different FFU manufacturers, it is recommended to provide the same version of the technical parameter table, installation drawings, target air volume, filtration level, control requirements and purchase quantity. Aili Industrial can discuss applicable configurations based on these conditions and clarify project quotation boundaries.

Related products: [FFU fan filter unit](https://ailigy.com/ffu.html ) · [EFU equipment side fan filter unit](https://ailigy.com/efu-fan-filter-unit.html ) · [HEPA/ULPA air filter](https://ailigy.com/HEPA-ULPA-air-filter.html ) · [FFU group control system](https://ailigy.com/ffu-group-control-system.html )

Aili Industry - From core components to FFU complete machines, it provides selection and technical support for clean room projects, semiconductor equipment and bulk purchase projects.