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For Smoke system, whether to use 2 speed lift/stair pressurization fans or to use fans with VFD?

Ventilation
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Question added by Sameh El-Assaad , Mechanical - Sr. Project Engineer - HVAC , China Construction Installation Engineering Co., Ltd - CCIE/CSCEC Middle East
Date Posted: 2015/11/12
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NIZAR AHAMED
by NIZAR AHAMED , Product Marketing Engineer , Euroblast

Use VFD is better than 2 spped option.

Petre Florea
by Petre Florea , Senior Long Term Planning Engineer , Newmont

VFD would give you more options.

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