ALF150 Duct Leakage Tester


Our Duct Leakage Tester is a low cost, compact, light-weight and totally self-contained unit. Commissioning engineers are provided with a high quality duct leakage tester with everything needed to test duct work systems for leakage under both Positive and Negative pressure. It is capable of developing static pressures from -2500Pa to +2500Pa, and flow rates of 1 to 150l/s. This provides approximately 140l/s of air flow for Class A leakage tests and up to 70l/s for Class C/D leakage tests. A single all in one instrument means that this duct leakage tester is not only simple to use, but also removes the complexity that might be associated with operating a duct work leakage tester and other forms of testing equipment.

[ – ] More Info

There are three models of the ALF150:

  • The ALF150
  • The ALF-PID
  • The ALF+

The ALF-PID provides a closed loop PID control feature that allows you to run a closed loop controlled leakage test. The user can setup a test to SMACNA, Eurovent 2/2 and DW/143. They can enter the size of the duct, the test pressure, duration, class of ductwork and the ALF controller will then calculate the allowable max leakage for the test. The controller will then run the test and pressurize the ductwork to the set pressure and monitor the leakage rate.  Based on the performance of the ductwork, the controller will indicate if the ductwork passed the test.

The ALF+ model offers greater accuracies with the inclusion of an ambient conditions module which will automatically measure the ambient temperature and barometric pressure for you. From these measurements, the real time air density will be calculated.

Both ALF150 models utilize the same three conical inlet nozzles designed to ISO5801:2007 and each unit is supplied with a fully calibrated instrument. The lightweight design and compact size of the unit mean that it can be lifted by one person and fit in even the smallest of hatchback boot compartments with room to spare for the accessories! With the ALF150, you can test and commission an installation to the following standards:

Standards the ALF150 allows you to test too include:

  • EN12237 Ventilation For Buildings
  • EN1507 Ventilation For Buildings
  • Eurovent 2/2

[ – ] Specifications

Standards BS EN 1507, 12237 (DW/143, Eurovent 2/2, SMACNA)
Volume Flow Measurement 1 l/s to 150 l/s over nozzle ranges
Pressure Measurement Range ± 2500 Pa
Typical Duty Points 70 l/s at 2000Pa, 140 l/s at 500Pa
Pressure Measurement Accuracy ± 1% of reading ± 1 digit
Leakage Flow Accuracy ± 2.5% of reading ± 1 digit
Resolution 1Pa
Sensor Damping 0.5s – 7.5s
Power 400W
Voltage 230Vac 50/60Hz (or 110Vac 50/60Hz available)
Unit Size 35 (W) x 46 (D) x 80 (H) cm
Unit Weight 20kg
Carry Case (c/w Accessories) Size 45 (W) x 45 (D) x 55 (H) cm
Carry Case (c/w Accessories) Weight 10.5kg
Clip on Trolley Size 38 (W) x 20 (D) x 94 (H) cm
Clip on Trolley Weight 6.7kg

[ – ] Applications

  • Duct Leakage Testing
  • Chilled Beam Testing
  • AHU Testing
  • End Of Line Testing