Concourse C Temporary Air Handling Units
Seattle-Tacoma
International Airport
Item No. 8e_supp
Meeting Date: April 12, 2022
Concourse HVAC Concerns
• Most Air Handling Units
(AHUs) on Concourse C are
operating at full capacity.
• Future project to upgrade
and replace the AHUs and
add smoke control will take
several years to complete
because of complexity.
2
Project Location
Project Scope
• Add two, 5-10 year temporary AHUs
– Provides additional air required to
support existing ADR tenant leases
that are soon to be constructed
– Supports increase turnover rate of air
for new restrooms that are currently
under construction to improve
passenger experience
– Minimizes impact to operations by
connecting to existing ductwork
3
Temporary AHUs
Additional Funding
• Material Costs
– Inflation and supply chain issues has increased costs on multiple
components needed for the project
– AHUs have more than doubled in cost
• Additional Piping
– Longer runs needed to provide adequate heating and cooling water
to units then initially planned
– Piping costs have gone up along with needed insulation to meet
energy requirements
4
Project Schedule
• Q2 2022: Finalize design and go out for Bid
• Q3 2022: Start construction
• Q4 2022: AHUs in-use
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