Dedicated​ E864​ Elevator Hoistway Pressurization System UL864​ Listed to​
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 The Elevator Hoistway Pressurization System (EHPS) uses the E864 controller from LFSystems to maintain a constant positive pressure in a high-rise building elevator/hoistway. The E864 includes up to three pressure differential transducers per controller to monitor and control pressure in the pressurized zone.

System features include:
- Supply Air Fan Control & Monitoring
- High & Low Pressure Warnings
- Dedicated Input for FACP/FSCS
- Modbus Communication Protocol
- Optional listed power supply
- Can be used with any variable speed fan rated for Smoke Control
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