| Heat pump in an air-conditioner is man’s best | | | | frozen and directly blocks the airflow over the |
| friend during the winter. With this pump installed in | | | | coil, making this pump being inefficient in such |
| an air-conditioner, the refrigeration cycle in the | | | | circumstance. To overcome this matter, the |
| air-conditioner can be reversed, where heat is | | | | system must be able to switch back the |
| produced in the room instead of cool air. This | | | | evaporator coil back to condenser coil temporarily |
| pump is normally referred to and known as a | | | | regularly for the outdoor unit in order to heat and |
| reverse cycle air conditioner. It is generally a more | | | | de-froze the coil. Therefore, an electric resistance |
| reliable pump as compared to electric resistance | | | | heating is formed and at the same moment, the |
| heating as this pump has higher efficiency. Some | | | | unwanted cold air from is being supplied into the |
| people prefer to have a heat pump system | | | | room. The icing issue hence is more often being |
| installed in their air-conditioner, where it enables | | | | encountered in cases with lower outdoor |
| the reverse refrigeration cycle to be reversed | | | | temperatures, which make heat pumps installed |
| during winter. By enabling the heat pump, coil | | | | replaced with natural gas or oil furnace in more |
| changes its role to become a condenser coil that | | | | extreme winter. |
| produces heat rather than being an evaporator | | | | Some air conditioner has heat pump while some |
| coil that generates cool air. | | | | do not. However, when it comes to air conditioner |
| This system is more popular in mild winter | | | | with “heat” function does not necessary |
| climates that have temperatures in the range of | | | | mean that there is a heat pump in that air |
| 4 to 13ºC. It is mainly because in places with | | | | conditioner as it might be other device like electric |
| extreme winter, the coil of the outdoor unit | | | | resistance heat. |