100% fresh air (no recirculation) requires full conditioning of all supply air through heating, cooling, and humidification coils, making it energy-intensive compared to recirculation strategies.

factualpending

Speaker

Unidentified Speaker — Fundamentals of HVAC - Basics of HVAC [klggop60vlM]

Evidence Quote

it's really expensive to do that, so if you imagine if you if you didn't have this connection here then All that air that you bought in brought in would have to be filtered heated and then cooled

Source

Fundamentals of HVAC - Basics of HVACThe Engineering Mindset
Created: 8/13/2026, 4:57:53 AM

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