4-Pipe Heat Pump Chiller vs. Standard Chiller + Boiler

Factor	Standard Chiller + Boiler	4-Pipe Heat Pump Chiller
Equipment count	2 systems	1 system
Compressors to maintain	1 (chiller only)	1
Fuel source	Electricity + on-site fossil fuel	Electricity only
Heat from cooling process	Rejected to atmosphere	Recovered as usable hot water
Typical payback vs. dual-system CapEx	— baseline —	3–5 years

Heating + cooling demand overlap

Primary project driver

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