The best split system air conditioners in 2021

Best 2kW split system air conditioner units

For the very small split system air conditioning units, the top two energy-efficient Mitsubishi Electric models are also the lowest in price. They are affordable and great value for money. The Daikin and Panasonic model is less energy efficient, but much higher in price. Fujitsu offers a great value cooling the only model for around half the price of the top Mitsubishi Electric models.

BrandModel NoCool StarsCool Output (kW)Heat StarsHeat Output (kW)Purchase Price
MitsubishiElectricSRK20ZSXA-W7.027.02.70$445
MitsubishiElectricSRK20ZMXA-S6.025.52.5$457
Fujitsu ASTG07CMCA/AOTG07CMCA5.52.10$240
MitsubishiElectricDXK06ZSA-W5252.7$554
Daikin FTXM20P/RXM20P52$234
Panasonic CS-Z7RKR/CU-Z7RKR52.0552.7$548
Daikin FTXM20P/RXM20P5252.70$571

Best 2 to 2.5 kW split system air conditioners

For small split systems, the Daikin model comes out on top. It has an amazing 7 star energy efficiency rating and a lower purchase price than all the other brands. The other brands offer their top models with less energy efficiency and a higher purchase price.

BrandModel NoCool StarsCool output (kW)Heat StarsHeat Output (kW)Purchase price
Daikin US7 FTXZ25NV1B/RXZ25NV1B72.573.5$594
Daikin FFA25A2/RXS25L35.52.533.2$777
SamsungAR09KSWSWKN52.553.2$625
MitsubishiMSZ-GL25VGD/MUZ-GL25VGD5.52.553.2$657
PanasonicCS-Z25TKR/CU-Z25TKR52.55.53.2$640
Fujitsu ASTG09KNCB/AOTG09KMCB5.02.553.2$662

Best 3.5 kW split system air conditioners

With the small/medium split system air conditioning units, Daikin again comes out on top for the best value for money. Its model holds an energy efficiency of 5.5 stars and a purchase price, similar to the other brands. The other brands however offer a lower energy efficiency rating score. Interestingly, the Samsung model was the least energy efficient with 3 stars and had the highest purchase price.

BrandModel NoCool StarsCool output (kW)Heat StarsHeat output (kW)Purchase price
Daikin FTXZ35N/RXZ35N5.53.55.55$954
Panasonic CS-RZ12RKR/CU-RZ12RKR43.553.7891/457
Panasonic CS-Z35TKR/CU-Z35TKR43.53.54.3$994
MitsubishiSRK35ZSA-W43.54.53.7$931
Daikin FTXM35P/RKM35P3.53.553.7$954
Fujitsu ASTG12KMCB/AOTG12KMCB3.53.54.53.7$954/491
Mitsubishi MSZ-FH35VE-A3.53.554.00$948
Samsung AR12KSFSAWKN/AR12KSFSAWKX33.53.54.00$1039

Best 5 kW split system air conditioners

In the medium split system unit range, Panasonic, Daikin and Mitsubishi Electric all had models with the same energy efficiency rating of 4 stars and a similar purchase price. Samsung again reflected the worst value for money, with two of its models having extremely low energy star ratings and high purchase prices.

BrandModel NoCool StarsCool Output (kW)Heat StarsHeat Output (kW)Purchase price
PanasonicCS-RZ18RKR454.61456
Daikin FTXM50P/RXM50P4546$1485
MitsubishiElectricMSZ-GL50VGD/MUZ-GL50VGD44.83.55.8$1450/714
Fujitsu ASTG18KMCA/AOTG18KMCA3.553.56$1507/697
Samsung AR18KSFSAWKN/AR18KSFAWKX2.5536$1622
Samsung AR18KSFTAWQN/AR18KSFTAWQX252.56$1804

Best 7kW+ split system air conditioners

In the large air conditioner group, all of the five brands had a model with a 3 star energy efficiency rating. All also had a similar purchase price except for Samsung, which again had a much higher purchase price. Samsung also has another model with a 2 star rating, with the highest purchase price than all of the other models listed.

BrandModel NoCool StarsCool Output (kW)Heat StarsHeat Output (kW)Purchase price
Samsung AC071KN4PEH/AC071KXAPEH37.1382238
Fujitsu ASTG22KMCA363.57.2$1919
Panasonic CS-Z21RKR/CU-Z21RKR363.57.2$1919
Daikin FTXM60P/RKM60P363.57$1867
Daikin FTXM60P/RKM60P36$885
MitsubishiElectric MSZ-GL60VGD/MUZ-GL60VGD363.56.8$1861
Fujitsu ASTG24KMCA/AOTG24KMCA2.57.138$2358
Daikin FTKM71Q/RKM71Q2.57.103.58.1$2233 
Samsung AR24KSFSAWKN/AR24KSFSAWKX27.128$2518

Best 9kW+ split system air conditioners

For extra large units, Panasonic has the highest energy efficiency rating with 3.5 stars and the lowest purchase price, offering value for money. Samsung again had one of the highest purchase prices, alongside Fujitsu.

BrandModel NoCool StarsCool Output (kW)Heat StarsHeat Output (kW)Purchase price
Panasonic S-100PU2E5A/U-100PE1R5A3.5104.511.20$2615
Samsung AC100KN4PEH/AC100KXAPEH3103.511.20$3078
Mitsubishi SRK95ZRA-W/SRC95ZRA-W2.59.5kW3 stars10.3kW$2895
Fujitsu AUTA36LCLU/AOTA36CTL2.010.002.511.20$3380

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