PTACs – Knowledge and References

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HVAC Basics and Indoor Air Quality

Published in Ed Bas, Indoor Air Quality, 2020

According to the Air-Conditioning Refrigeration Institute (ARI), a P-TAC consists of a wall sleeve with a separate unencased combination of heating and cooling assemblies specified by the builder and mounted through the wall. In this system’s air-source heat pump, a heat exchanger passes inside heat to outdoor air when cooling and extracts heat from outdoor air when heating. PTAC units are installed on an exterior wall and are primarily for commercial use to heat and cool a single room or zone.

Quantifying the nationwide HVAC energy savings in large hotels: the role of occupant-centric controls

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Journal Information

Published in Journal of Building Performance Simulation, 2021

Zhihong Pang, Yan Chen, Jian Zhang, Zheng O’Neill, Hwakong Cheng, Bing Dong

It is noted that some hotels, especially some mid-priced full-service hotels, tend to use the packaged terminal air conditioner (PTAC) for heating and cooling of the guestrooms. Such a system usually takes in a fixed amount of outdoor air and has no damper to flexibly adjust the amount of outdoor air supply. The HVAC controls and available occupant-centric controls for such a system would be very different compared with the VAV system and DOAS system, and will not be discussed in this study.