What is Packaged terminal air conditioner?
[[File:Packaged terminal air conditioner removed.jpg|thumb|A removed PTAC unit showing it's components.]] A '''packaged terminal air conditioner''' ('''PTAC''') is a kind of self-contained heating and [[air conditioning]] system. It is commonly found in hotels, motels, senior housing facilities, hospitals, condominiums, apartment buildings, add-on rooms & sunrooms. Many PTACs are designed to be installed in a wall. They have vents and heat sinks both inside and outside. Different standard dimensions are found in the market including 42×16 inches, 36x15 inches, and 40x15 inches.<ref>{{Cite web|title=Daikin Comfort Technologies Recalls Amana Packaged Terminal Air Conditioners and Heat Pumps Due to Burn and Fire Hazards (Recall Alert)|url=https://www.cpsc.gov/Recalls/2023/Daikin-Comfort-Technologies-Recalls-Amana-Packaged-Terminal-Air-Conditioners-and-Heat-Pumps-Due-to-Burn-and-Fire-Hazards-Recall-Alert|access-date=2025-02-24|website=U.S. Consumer Product Safety Commission|language=en}}</ref><ref>{{Cite web|last=Odom|first=J. David|date=2018-08-27|title=The 3 myths of PTAC units|url=https://www.bdcnetwork.com/home/blog/55150666/the-3-myths-of-ptac-units|access-date=2025-02-24|website=Building Design+Construction|language=en}}</ref><ref>{{Cite web|date=|title=How to Repir Air Conditioners?|url=https://www.repair-hub-kuwait.com/|access-date=|language=ar}}</ref><ref>{{Cite web|date=2021-06-24|title=LG Packaged Terminal Air Conditioners Prematurely Corrode in Hawaii Due to Environmental Conditions, Class Action Says|url=https://www.classaction.org/blog/lg-packaged-terminal-air-conditioners-prematurely-corrode-in-hawaii-due-to-environmental-conditions-class-action-says|access-date=2025-02-24|website=www.classaction.org|language=en}}</ref> The older units usually use mechanical control with mechanical push buttons to select the mode of operation and fan speed control. Another rotary knob is used to set the desired temperature of the unit. This was the most cost-effective and simplest method of control in the past. The de