Good air conditioning can be used for ten years, and the price is not low. Therefore, buying Air Conditioners must not be cheap, buy air conditioners depends on the quality of the products: 1. Whether to use a brand-name compressor, the compressor is the heart of the air conditioner, a good heart is of course important. 2. Whether to use high-quality and efficient heat exchangers, such as hydrophilic membrane trapezoidal aluminum sheets, internal thread copper tubes, etc. 3. Whether to use the unequal cross-flow wind blade and the stepper motor to drive the wind swing to achieve ultra-quiet design. 4. Whether it is super cooling (heat), quickly reach the set temperature. 5. Whether the shape of the product is beautiful, whether it is in harmony with the home environment. 6. The amount of cooling (heat) of the product, and select the appropriate amount of cooling (heat) according to the area of ​​the room. 7. Whether the product saves electricity. Generally speaking, the higher the cooling (heat) quantity, the lower the input power, the more power-saving the product. 8. The length of life. Whether to use microcomputer fuzzy control to achieve non-stop operation, whether it can automatically defrost. 9. Look at the noise indicator of the product. 10. Is there a low voltage automatic compensation function and a wide voltage working range? In addition, when purchasing the air conditioner, it is necessary to see that the ribs of the evaporator and the condenser are arranged neatly, the flap is not damaged, and the ribs are tightly coupled with the Copper Tube, and are not loose. Check the operation of the air conditioner, start the air conditioner to see if there is abnormal noise in the compressor operation; the fan runs normally, the difference between high, medium and low speed is obvious, the noise is small; the appearance is smooth, beautiful, and the quality of the plated parts is good. 11. Try to choose low-carbon air-conditioning to reduce carbon emissions, implement low-carbon environmental protection, and protect the earth. Vacuum Pump,Vacuum Pump Hvac,Vacuum Pump For Refrigerant,Hvac Vacuum Pump LONG TERM ELEC. CO., LTD , https://www.longtermhvac.com