The Quaternity system produces more sensible capacity and better dehumidification than a standard split system allowing in some instances a smaller nominal capacity system to be selected.
If we compare the sensible cooling capacity of a nominal 9MBH Quaternity system we can see that it has 164% of the equivalent 9MBH Standard Split Systems capacity and 121% when compared to the 12 MBH.
This is consistent throughout the range of Quaternity and can be seen above when comparing the 15MBH Quaternity to the 15MBH standard Split System it has 120% of its capacity and the same sensible capacity when compared to the 18MBH.
It is not only the sensible capacity where the Quaternity unit excels, when you look at the moisture removal rate the Quaternity also exceeds most of the equivalent standard split system and one size up.
Thermal comfort is maintained when the heat generated by human metabolism is allowed to dissipate, thus maintaining thermal equilibrium with the surroundings. It has been long recognized that the sensation of feeling hot or cold is not just dependent on air temperature alone.
Humans are sensitive to humid air because the human body uses evaporative cooling as the primary mechanism to regulate body temperature. Under humid conditions the rate that perspiration evaporates from the skin is lower than it would be under dry conditions. Because humans perceive the rate of heat transfer from the body rather than the surrounding temperature itself we feel warmer when the relative humidity is high than when it is low.
Under conditions of high humidity, the evaporation of sweat from the skin is decreased and the efforts to maintain an acceptable body temperature may be significantly impaired which causes us to feel sticky or start to sweat.
DEHUMIDIFICATION
without lowering the temperature
Dehumidification has many beneficial effects on comfort levels. During the summer, where there is an infiltration of high humidity ambient air, even during mild ambient conditions, the room can feel very hot and stuffy. With "Quaternity controlled dehumidification" the system controls the indoor humidity level by mixing the cool dry air with warm air via its intelligent indoor heat exchanger technology. Also, this feature prevents inefficient overcooling, which helps to save on energy use.
Room temperature 77°F
Humidity 80%
UNCOMFORTABLE
Hot and stuffy with high humidity.
Humidity 45-50%
COLD DRAFT
The room is over cooled down to 70 °F to achieve satisfactory dehumidification. It results in an uncomfortable cold sensation.
Room temperature 77°F
Humidity 50%
COMFORTABLE
Decreasing humidity while
maintaining the temperature
increases comfort.
How is the Quaternity Dry Operation Achieved?
The evaporator of the indoor unit is divided into two sections and solenoid valves are provided in between. In cooling mode, the expansion valve between the condenser and the evaporator works to send low-pressure refrigerant to the indoor side, but in Quaternity Dry Operation, the expansion valve is kept open and a part of the indoor unit is used as a condenser by working the solenoid valve.