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Saturday 12 November 2016

Energy Cost Of Residential Airconditioners (Single Phase Power)



Air conditioner is one of the electrical appliances which consumed high amount of energy at home. In order to save on energy bill in the long run, it is recommended to install an energy efficient airconditioner at home. Below is a list of brand of airconditioners which are available in the Singapore Market for home use. It shows energy cost per year and also the price to install a system 3. 

A properly maintained airconditioner should last at least 7-8 years on average taking into consideration the compressor which is the most expensive component has a 5 years warranty.

Comparison Table for System 3 

Annual Energy Cost is derived from 8 hours usage daily and Energy Tarrifs of 19.13 cents per kWh


Brand Model Green Ticks Cooling Capacity (kW) Full Load COP1,2 Part Load COP1,2 Weighted COP3 Annual Energy Consumption (kWh)4,5 Annual Energy Cost ($)4,6 CU Height Standard HDB Price found online
Daikin MKS65QVMG 5 6.15 5.07 6.36 5.84 2342 448 695 mm S$3,220.00
Daikin 3MKS71FSG 3 6.89 3.82 4.66 4.32 3522 674 735 mm S$2,925.00
Fujitsu AOAG20LBTA3 4 5.78 4.37 5.72 5.18 2564 490
S$3,299.00
Fujitsu AOAG24LAT3 2 7 3.7 5.5 4.78 3440 658 700 mm S$2,635.00
Hitachi RAM-68Q9 2 6.92 3.4 4.64 4.14 3837 734 750 mm S$2,709.00
LG A4UQ26GFA0 3 7.86 4.05 5.79 5.09 3457 661 655 mm S$2,817.00
LG A4UQ26GFA2 5 6.47 5 5.84 5.5 2523 483 655 mm S$3,269.00
LG A3UQ26GFA0 2 7.74 3.67 5.75 4.92 3673 703 655 mm S$2,575.00
LG A4UQ26GFA1 4 7.18 4.5 5.52 5.11 3031 580 655 mm S$3,299.00
Midea M3OA-21CDN1-QC4 2 5.83 3.44 4.27 3.94 3183 609 700 mm S$2,019.00
Midea SMKY-21-O-04 4 5.78 4.46 5.51 5.09 2529 484 700 mm S$2,723.00
Mitsubishi Electric MXY-3G28VA 5 6.12 5.01 6.43 5.86 2295 439 710 mm S$3,461.00
Mitsubishi Electric MXY-3A28VA, MXY-3A28VA-R7 2 7.31 3.36 5.17 4.45 3924 751 710 mm S$2,834.00
Mitsubishi Heavy Industries SCM60ZJ-S1 3 6.19 4.17 5.38 4.9 2803 536 640 mm S$2,742.00
Panasonic CU-3XS27RKZ 3 5.81 3.99 5.39 4.83 2716 519 695 mm S$2,990.00
Panasonic CU-3S27MKZ 2 7.44 3.41 5.11 4.43 3936 753 695 mm S$2,614.00
Samsung AJ21FCJ3EC 2 6 3.4 4.55 4.09 3300 631 638 mm S$2,581.00
Sharp AU-X3M24RV 2 6.99 3.53 5.26 4.57 3539 677 710 mm S$2,737.00
Toshiba RAS-3M20SACV 2 5.8 3.42 4.48 4.06 3241 620 695 mm S$2,531.00
York YPH3YC021BAMSA-X 2 6.06 3.52 4.32 4 3358 642 695 mm S$2,188.00
1. Coefficient of Performance (COP) means the ratio of the total cooling capacity expressed in Watts to the total effective input power expressed in Watts.
2. Full load COP means the COP at 100% load, while Part load COP (applicable for inverter air-cons only) means the COP at 50% load.
3. Weighted COP = 0.6 x Part Load COP + 0.4 x Full load COP. Weighted COP is used to calculate the annual energy consumption and annual energy cost for inverter air-conditioners.
4. Annual energy consumption and annual energy cost include the standby energy consumption.
5. The actual annual energy consumption depends on factors such as room temperature, thermostat setting, frequency of maintenance etc.
6. The estimated annual energy cost may vary from the actual annual energy cost.
7. kW is approximately 3412 BTU/hr.


Brands Comparison of Energy Efficiency can be found on NEA's Website


https://e-services.nea.gov.sg/els/pages/search/publicsearchproduct.aspx?param=goods&type=p



Based on lastest energy Tarrifs from EMA website










https://www.ema.gov.sg/Residential_Electricity_Tariffs.aspx