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Air Handling Unit DongKuk Greentec leads the "environment-friendly industry!"
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Indoor Environment Design Condition Remark (Building Standard Law)
Temperature Summer 25~27˚C
Winter 20~22˚C
17~28˚C (temperature difference between outdoor and indoor space: above 7˚C)
Relative Humidity Summer 50~60˚C
Winter 40~50˚C
Air Current Speed 0.1~0.2 m/s Less than 0.5m/s
Airborne Dust - 0.15 mg/㎥
Co Concentration - Less than 0.01% (Less than 10ppm)
Co2 Concentration - Less than 0.1% (Less than 1000ppm)

Item Devide Functions
Heat Source Equipment Refrigerator, Boiler, Heat Pump Making heat source for cooling and heating (cool water, hot water, refrigerant, steam warm current of air, et cetera)
Heat Exchange Equipment Air Conditioner, Heat Exchanger Adjusting and blowing temperature/humidity, cleanliness of air sent to the air conditioning space. Making heat source to be sent to the air conditioning space
Heating Medium Transfer Equipment Blower, Pump, Duct, Pipe Sending heat sources (air, water) to the air conditioning space and air conditioner
Indoor Unit Outlet, Inlet, Fan Coil Unit, Catalysis Unit, Package-type Unit, Radiator, Multi-unit Air Conditioner Converting the air in the air conditioning space to conditioned air or supplying conditioned air
Automatic Central
Control Equipment
Automatic Controller, Central Control, Remote Control Automatically controlling humidity and flux and inspecting equipment for rational operation of the equipment above

System Details
Air System
* Single DUCT System
* Multi ZONE System
* Dual DUCT System
Uses air only as heating medium
* Single DUCT sends cold air or hot air.
* Multi ZONE sends air at different temperature.
* Dual DUCT sends cold and hot air to each room or each zone.
Water+Air System
* Fan-coil Unit System
* Induction Unit System
Supplies water (hot and cold) and air to room as heating medium
* Equipped with fan. air is used in separate system.
* Entices indoor air with high-pressure air.
Water System Uses water only as heating medium
* Equipped with fan. Outdoor air intake is available from outer wall at the backside
Package System Air conditioner equipped with refrigerator
- Water Heat Source , Air Heat Source
- Duct System, Indoor Installation System
- Heat Source Water System, Refrigerant System (Multi)
Direct Heating System
* Hot Water Heating
* Steam Heating
* Radiant Heating
(Panel Heating)
The system that performs heating (does not use air conditioner.)
* Convection (natural, forced) system, Radiator system
* Convection (natural, forced) system, Radiator system
* Set MRT high through radiant (ceiling panel, floor panel, wall panel)

Classification Ⅱ
System Comparison Details
Central Type and Zone Type *Central System - Operating the whole building or large zone with one air conditioner
*Zone System - Installing air conditioner by each floor, purpose of use and load pattern
[Key Point]
* Equal control of temperature * Energy saving * Machine room space * Distribution performance of air
Single Duct and Dual Duct * Single Duct has variables (reheat, booster coil)
[Key Point]
* Individual (each room) control of temperature * Energy saving * Duct space * Economy * Mixed * Reheat loss
2-piping, 3-piping, 4-piping Type * 2-piping (supply+ventilation), 3-piping(cold water supply+hot water supply+common ventilation), 4-piping(cold water supply, ventilation+hot water supply, ventilation)
[Key Point]
* Individual (each room) control of temperature * Energy saving * Duct space * Economy * Mixed * Reheat loss
Water Cycle and Air System * As water has 1,000 times more heat supply per unit area than air, water is better option to treat concentrated load
[Key Point]
* Ventilation (air filtering, air supply) * Load treatment * Duct * Pipe space * Cost
Constant Flow Rate and Variable Flow Rate * Difference between changing temperature gap (constant flow rate) and changing flow rate (variable flow rate) for load change
[Key Point]
* Load change * Energy saving * Ventilation (air purity, air supply) * air distribution * Control features
Whole System and Part System * Whole System - Air conditionoing the whole space
* art System - Air conditionoing task space and residential space
[Key Point]
* Energy saving * Temperature distribution * Limiting temperature/humidity in non-task space
Convection and Radiation [Key Point]
* Comfort * Ventilation * Work * Energy saving
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