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Cake day: June 13th, 2023

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  • Large commercial HVAC package units often have an option called an “economizer”. It’s just one or more dampers that allow the unit to exchange inside air with outside air. A typical use case is when the unit gets a call from the thermostat for AC and outside air temp is lower than the room temp.

    It’s more for heating and cooling efficiency than air quality. Its also very rare for homes to have this kind of setup due the added cost and the fact that, at least in the US, package units are much rarer in residential installs. Fresh air circulation systems are a custom job which means $$$.