Does the seasonal saving justify the plant premium?

A 12,000 m² office needs new chilled-water plant. Both options meet peak demand. Compare their seasonal energy use, maintenance and renewal costs over 20 years.

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Equipment arrangement · Mercer House chilled-water replacement

YOUR ROLE

Cost manager · Building services

Floor area: 12,000 m²
Peak cooling: 900 kW
Annual cooling: 1,500,000 kWh thermal
Operating hours: 3,000 hours/year
Continuity: Replacement during winter closure
Appraisal: 20 years

AConventional chiller package

BHigh-efficiency chiller package

Brief → evidence → calculation → recommendation

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Method references and project data

Original teaching projects and cost schedules prepared for Scope Economics. Prices, operating profiles and allowances are exercise data, not supplier quotations. Apply the method using verified project inputs in practice.

US DOE · Cooling efficiency definitions ›NIST · Life-Cycle Costing Manual ›

Exit lesson HVAC plant selection20 min · Learn

Mechanical services / Mercer House chilled-water replacement