This presentation would surely help you buy the right AC for yourself or for recommending your friend or relative.

1. What does an AC do?
What is an Air Conditioner?
Air Conditioner is a HEAT TRANSFERRING DEVICE
The refrigerant inside the air conditioner absorbing the heat from the indoor
air and transferring it to outdoor in cooling operation.
Air Temperature
Air Humidity
Air Flow
Air Purity
Air Odour

2. How does an AC work?
Evaporator Coils
Condensor Coils Compressor Expansion Valve Fan Motor
(Including Capillary Tube)

3. How Air Conditioner Works?
What is a Refrigerant?
A refrigerant is a compound used in a heat cycle that undergoes
a phase change from a Vapour to a Liquid and back
Difference between R22 & R410a?
R22 R410a
Non CFC Free CFC Free
R410a has 50~70% more pressure than R22,
Hence, a better cooling efficiency
R410a has a higher boiling temperature than R22,
so can easily operate in high ambient temperatures
CFC: Chloro Fluoro Carbons

4. How Air Conditioner Works?
Condensor Coils
High Temperature &
Liquid Vapour
High Pressure
Fan Motor
Expansion Valve Compressor
Capillary Tube
Liquid Vapour
Evaporator Coils
Hot Air

5. Basic Terminology
Non Star Rated System
1 Ton = 12000 BTU (British Thermal Unit)
1.5 Ton = 18000 BTU (British Thermal Unit)
2 Ton = 24000 BTU (British Thermal Unit)
Cooling Capacity (In Watts) = Cooling Capacity (In BTU).
3.413
Star Rated System
1 Ton = 12000 BTU = 3516 Watts
1.5 Ton = 18000 BTU = 5274 Watts
2 Ton = 24000 BTU = 7032 Watts

6. Basic Terminology
To Calculate the Tonnage, if Cooling Capacity is given in Watts
Tonnage = Cooling Capacity (In Watts)*3.413
12000

7. Basic Terminology
Tonnage Calculator
Tonnage Recommended Room Size
0.75 TON Below 80 Sq. ft.
1.0 TON Up to 110 Sq. ft.
1.25 TON Up to 150 Sq. ft.
1.5 TON Up to 160 Sq. ft.
2.0 TON Up to 210 Sq. ft.
2.5 TON Up to 265 Sq. ft.
3.0 TON Up to 315 Sq. ft.
Under Standard Condition
1. Ceiling height is not more than 9.5 feet to 10 feet
2. AC is not installed East facing
3. Not more than 1 Glass Window

8. Why Split Air Conditioner?
1. Powerful outputs to cool large areas
2. Quiet operation
3. More features and function
4. Attractive designs
5. Good air distribution of the same size
6. No obstruction of Window Space
7. Better EER

9. STAR RATING
(By BEE (Bureau of Energy Efficiency))
What does more stars mean?
Ans. More Energy Saving

10. STAR RATING
(By BEE (Bureau of Energy Efficiency))
EER (Energy Efficiency Ratio) = Cooling Capacity (In Watts)
Input Wattage (In Watts)
Star Rating Slab# From 2012 Star Rating Slab*
EER (W/W) EER (W/W)
Star Rating Star Rating
Min. Max. Min. Max.
1 Star ★ 2.30 2.49 1 Star ★ 2.50 2.69
2 Star ★★ 2.50 2.69 2 Star ★★ 2.70 2.89
3 Star ★★★ 2.70 2.89 3 Star ★★★ 2.90 3.09
4 Star ★★★★ 2.90 3.09 4 Star ★★★★ 3.10 3.29
5 Star ★★★★★ 3.10 ↑ 5 Star ★★★★★ 3.30 ↑
#Still Applicable for 2012 & 2013 Window AC *Applicable for 2012 & 2013 Split AC
3 Star 1.5T Split AC (EER: 2.90) is more energy efficient than 3 Star 1.5T Window AC (EER: 2.70)
3 Star 1.5T Split AC (Input Wattage: 1800Watts) 3 Star 1.5T Window AC (Input Wattage 1950Watts)
Savings: 0.15 Units/hour>>>Savings Per Day@10hour operation: Rs.7.5/->>>Savings Per Month: Rs.225/-

11. How to Increase Star Rating?
To Increase Star Rating i.e. Save more energy
EER is to be Increased
There are two ways to increase EER
1. Reduce Input Wattage i.e.
Energy Efficient Compressor that takes less current
2. Increase surface area of Condenser Coils*,
this would dissipate the heat faster, and
the cooling would be faster
Compressor would cut off early
Save Electricity
This is reason why Outdoor Unit of 2 Star, 3 Star and 5 Star differ in size
2 Star 3 Star 5 Star
* Applicable only for Copper Condenser and not Micro Channel Condenser

12. Application of 5 Star Rated AC
Which is Best Application Area for a 5 Star Rated AC?
Bed Room or an Area where AC runs for Long Periods (Max. 8 to 10 Hours)
For Eg.
1.5 Ton 5 Star Model Consumes 1520W i.e. 1.52 unit/Hour
1.5 Ton Non Star Model Consumes 2120W i.e. 2.12 unit/Hour
Savings with 5 Star AC is 0.6 Unit /Hour
Per Unit Cost = Rs. 5/-
Savings with 5 Star AC Rs. 3/Hour
Savings with 5 Star AC if run for 10hours/day is Rs. 30 Per Day
Savings with 5 Star AC Per Month (30 Days) is Rs. 900 Per Month
Savings with 5 Star AC Per Year if is operated for 8 Months in a year
Rs. 7200/-
In Next Five Year you would get your money back, rest is all savings

13. Inverter Technology: Energy Saving
Just like a diesel car, Inverter AC too have a bit higher initial cost but pays for itself with time.
More you use it, more you save.

14. Inverter Technology: Cost Saving
4 Times of
Running Current
Current
Current
Variable Running Current
Running Current
Time Time
For 1.5Ton Non Inverter, 4KVA Stabilizer is recommend due to high current requirement initially
For 1.5Ton Inverter, Stabilizer is not required in areas where fluctuations are not there Only 2KVA
max. load requirement is there.
Taking Scenario of 100% Power Back Up for 3BHK Property, which means 4 ACs

15. Inverter Technology: Less Noise
1
2
3

16. Inverter Technology: Faster Cooling

17. Inverter Technology: Comfort
Non Inverter
Room Temperature
320C Compressor Working
Big Temperature Variation
Set
Temperature
260C
Time

18. Inverter Technology: Comfort
Room Temperature
320C
Inverter
Compressor Working
Very Minimal
Temperature
Variation
Set
Temperature
260C
Time