HVAC systems are used in many commercial and industrial applications to control temperature, humidity, and air quality. There are different types of air conditioning systems including window units, ductable split units, package units, direct expansion (DX) systems, and chilled water systems. When selecting an HVAC system, factors such as heating and cooling loads, efficiency, noise levels, installation requirements, and cost should be considered. Heating and cooling loads are calculated based on outdoor conditions, building materials, sunlight exposure, occupancy levels, ventilation needs, and other sources of heat gain or loss.

1. HVAC
Heating Ventilating Air Conditioning

2. Applications of Air Conditioning
Department stores
Coliseums
Grocery warehouses
Commercial Complex
Theaters
Offices
Food processing industries
Semicon industries
Hospitals
Etc...

3. Tons of Refrigeration (TR)
1 TR is the amount of heat to be
removed from the atmosphere to
melt one metric ton of ice in 24
hours.
1 TR = 12000 Btu/hr = 3025 kcal/hr

4. Functions of Air Conditioning
Control air temperature to provide
thermal comfort
Control air moisture content
Maintain proper air movement
Control air contamination and odor
within acceptable limits

5. Basic Cycle and Components of
Air Conditioning

6. Types of AC Systems

7. Window Type AC Units

8. Ductable Split AC Units

9. Package Type AC Units

10. DX System

11. Chilled Water AC System

12. Things to consider in AC system
selection
Heating load requirement
Air distribution system or ducting
system
Efficiency of the AC System
Noise level
Water distribution system
Economic viability of the system
Space requirement

13. Things to consider in
calculating heating load
Outside and indoor conditions
Room dimensions and height
Construction materials
Sunlight heat gain
Glass transmission heat gain
Infiltration heat gain
Heat from occupancies
Cubic feet of fresh air required
Heat load from outside sources
Room sensible heat
Room latent heat
Outside heat