| 1. Collection technology | Technology offered, such as an electrostatic precipitator (ESP), a mechanical filter, or a combined system; include the intended particle and process type. | Check that the proposed technology matches the smoke or particulate characteristics. ESP performance can be affected by particle resistivity, gas temperature, moisture, and gas-flow distribution. |
| 2. Design airflow | Rated airflow in m³/h or CFM, operating range, inlet conditions, and the number of operating hours assumed in the design. | Compare suppliers using the same stated operating conditions. Confirm the equipment is sized for the actual process flow, including expected peak loads. |
| 3. Removal performance | Guaranteed inlet and outlet particulate concentrations, stated in mg/Nm³ where applicable, plus the test method, sampling location, and operating conditions. | Compare outlet concentration and test basis rather than relying on an efficiency percentage alone. Ask for project-specific guarantees and documented test results. |
| 4. Pressure drop and energy use | Clean and operating pressure drop in Pa, fan power, and the electrical consumption of the collector, controls, and any high-voltage supply. | Consider total system energy, not just collector power. Pressure drop and fan demand can vary with system design, dust loading, and maintenance condition. |
| 5. Emissions compliance support | Applicable project or jurisdictional emissions limits, proposed testing approach, and documentation the supplier will provide for commissioning. | Verify requirements for the specific site and process. For stationary-source dust measurements, EN 13284-1 is one recognized gravimetric measurement method; confirm its suitability with the project’s compliance specialist. |
| 6. Materials and operating conditions | Housing and electrode materials, design temperature, corrosion protection, and any limits for humidity, corrosive gases, or abrasive particles. | Match materials and operating limits to the actual gas chemistry and temperature. Request written confirmation for any corrosive or high-temperature service. |
| 7. Dust handling and maintenance | Hopper or collection-bin capacity, discharge method, cleaning method, expected inspection tasks, and access requirements. | Check that collected dust can be safely removed and handled at the site. Compare maintenance tasks, access needs, and the effect of cleaning or shutdowns on production. |
| 8. Electrical and process safety | Electrical supply, control-panel details, interlocks, isolation provisions, and the safety documentation supplied for installation and operation. | Confirm compatibility with local electrical codes and site safety procedures. For ESP equipment, review high-voltage isolation and safe-access arrangements. |
| 9. Installation and commissioning | Scope split for equipment, duct connections, foundations, wiring, commissioning, operator training, and performance testing. | Compare a complete scope of supply and identify exclusions before comparing prices. Confirm who is responsible for commissioning and documenting results. |
| 10. Global service and commercial terms | Service coverage by region, spare-parts availability, response arrangements, warranty terms, delivery schedule, and language of technical documents. | Assess support for the installation location and the expected equipment life. Compare warranty conditions and spare-parts lead times in writing rather than relying on general assurances. |