Variable Frequency Drives (VFD)
Replacement Phase-2
C800978 | N06567
Trevor Emtman
AV-PMG
Item No. 8g
December 10, 2024
Item No. 8g_supp
Meeting Date: December 10, 2024
Project Scope
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Replacement of the oldest and obsolete VFDs that are beyond their useful lives.
VFD (Variable Frequency Drive) is an energy conservation device that modulates the
HVAC fans, pumps, cooling towers, etc. and allows for better occupancy comfort.
Project Justification
• The VFDs are obsolete and are no longer supported by the manufacturer.
• Failure of a VFD will cause HVAC or plumbing system to become non-operational,
resulting in loss of ventilation air flow, temperature control, or water flow.
• Manual HVAC control (VFD failure) will result in poor passenger comfort and
increased energy consumption, as well as security issues if building pressurization
affects door operation.
• The VFDs with the highest risk of failure have been prioritized for this project.
• VFDs save energy by modulating motor speeds to meet real-time demand.
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Schedule
4
20262025202420232022
Q3Q2Q1Q4Q3Q2Q1Q4Q3Q2Q1Q4Q3Q2Q1Q4Q3Q2Q1
PLANNING
SD EXECUTED
DESIGN
CONSTRUCTION
Cx Design
Cx Construction Substantial Completion
Requested Authorization
AmountProject PhaseAuthorization
$2,615,000Notebook + DesignPrevious Authorizations
$7,885,000Construction + CloseoutCurrent request for Authorization
$10,500,000Notebook + Design +
Construction + Closeout
Total authorizations, including this
request
$0N/ARemaining amount to be authorized
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Note: There has been no change to the project budget since design authorization (06/27/2023)
Cone of Certainty
6
We are here
Requesting
• Commission authorization for $7,885,000 to execute
construction contract and use PORT crews for abatement work.
• Approval to increase the total project authorization to a total
estimated $10,500,000.
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QUESTIONS?
8
