Retrotec DucTester 341 - Manual (Page 77)

Page 77 of 83
©Retrotec Inc. 2014
Appendix E: Using a generator for power
Retrotec recommends a generator with inverter type AC power output. Size the generator capacity
above the maximum power required in order to reduce distortion of the AC power waveform. The
higher the rated power output, the better. Suggestions for minimum generator output sizes are 3000W
for Blower Doors and 500W for DucTesters.
Table 13: Acceptable generator power output.
Fan Operating
Voltage
Max Operating
Current (Watts)
Max Inrush
Current
Minimum Generator
Power Output
Model 300 Series DucTester
120VAC 2A (240W) 2.5A (300 W)
500 W
208VAC N/A N/A
Model 300 w/2350 Fan Top
120VAC 2A (240W) 3A (360W)
208VAC 0.9A (187W) 1.2A (250W)
When selecting the generator, look for key words and phrases including:

“inverter output”

“utility-grade AC power”

“suitable for sensitive electronics”
Table 14: Portable generator AC power output types.
Type of AC Power Output
Comments/Expectation
Inverter
Best; Compatible Recommended
AVR – Automatic Voltage Regulation
Questionable; May not perform Not Recommended
Brushless
Worse; May not perform Not Recommended
CycloConverter
Worst; May not perform Not Recommended