For Users’ Comfort Cooling

Conventional air conditioners are built to blow cold air downwards and directly at people to cool them instantly. However,
when in direct contact with cold air for too long, some people experience discomfort and dry skin.

Inspired by the cooling effect of caves, Doctor Naoshi Kakitsuba investigated the benefits of RADIANT COOLING. He found that this gentler and more even cooling method results in a greater feeling of comfort and wellbeing.

Photograph of Dr. Naoshi Kakitsuba
DR NAOSHI KAKITSUBA
Dept. Of Environmental Science and Technology, Meijo University Japan

The Principle of Radiant Cooling

Conventional Cooling

Conventional cooling heat absorption by breeze diagram
Heat is absorbed by the breeze on the skin, resulting in a cool feeling.

Radiant Cooling

Radiant cooling heat absorption by cooled surrounding diagram
Heat is absorbed by the cool surrounding walls and ceiling, resulting in a cool feeling.

Conventional Cooling

Conventional cooling direct to human body diagram
The breeze directly contacts the body for cooling.

Radiant Cooling

Radiant cooling cools wall and ceiling diagram
The breeze cools the walls and ceiling, which absorb the body heat.

Cools Gently and Evenly

The SKY Series makes the room evenly cool, even though no airflow feeling.
The cooling system of SKY Series gives comfort based on the principle of RADIANT COOLING.

Temperature Distribution

Temperature distrubition of conventional cooling

Temperature Distribution

The temperature in all areas of the room can be evenly set at a comfortable level.

Temperature distrubition of radiant cooling

Air Velocity Distribution

Air velocity distrubition of conventional cooling

Air Velocity Distribution

Comfortable in living space with no wind
(less than 0.2 m/s meter per second)

Air velocity distrubition of radiant cooling

Test conditions: Measured in stable operation at 25˚C cooling  with fan speed set at "HI."

Radiant Cooling Removes Heat From Ceiling And Walls

SKY Series makes people comfortable because the radiant heat from ceiling is less.

Radiant Heat From Roof Top & Ceiling

Radiant heat from roof top and ceiling of conventional cooling

Radiant Heat From Roof Top & Ceiling

Radiant heat from roof top and ceiling of radiant cooling

Sensation evaluation

Sensation evaluation of conventional cooling

Sensation evaluation

Sensation evaluation of radiant cooling

Measured in stable operation at 25˚C cooling with fan speed set at "MEDIUM."
The actual average room temperature is the same.

The globe temperature is about 0.8˚C higher (=About 1.1˚C higher in terms of how people feel comfortable). The globe temperature is a composite temperature used to estimate the effect of temperature, humidity, and solar radiation on humans.

The Benefits of Radiant Cooling

SKYWING angles upwards to cool without direct airflow, thus preventing overcooling
and maintains skin moisture.

Skin Moisture After 60 Minutes

Moisture content quantity after 60 minutes of conventional cooling

Skin Moisture After 60 Minutes

Moisture content quantity after 60 minutes of radiant cooling

Measured in stable operation at 25˚C cooling with fan speed set at "HI."

Disclaimer

*Applicable to ELITE INVERTER only.
*All test results are based on internal test.