Second, look at the compressor. At present, the best compressor in China is the American grain compressor. Of course, Asia's air energy industry is also at the forefront of Japan. At present, the brands used by Michael Cool are all American grain compressors, which can help you understand the production process. At present, Maiku manufacturers can provide air energy installation technical training and negotiation training. This is the agent's first choice, and customers can provide more assured advertisements to help you.

Third, look at cop, energy efficiency ratio = heating capacity ÷ rated power. Here, we compare the cop of the top ten products, conduct a sampling survey, and extract product data from official website.

Fourth, listening to the noise can judge the stability of the compressor operation, and the noise of the main engine will also affect the normal rest.

Fifth, look at the insulation effect/insulation technology in winter. At present, the air energy water heater is very intelligent. As long as it reaches the set temperature, it will automatically stop heating, and as long as it drops to a specific temperature, it will automatically start heating. So heat preservation is the key to saving electricity and comfort. It is not recommended to buy too small air energy, such as wall-mounted air energy. The smaller the water quantity, the faster the heat dissipation (what is the physical principle? ) It will be a bit embarrassing to keep warm badly in winter. Michael's cold water tanks have insulation walls, which can keep warm for a long time.

Sixth, looking at the water tank is actually looking at the leak-proof performance and thermal insulation performance of the water tank. If it is leak-proof, it depends on the water quality. If the water quality is not good, it is recommended to buy a water tank with an enamel liner. There is still a difference between north and south. At present, most domestic manufacturers have begun to eliminate stainless steel liners and replace them with enamel liners. As long as the porcelain is not exploded (in layman's terms, the enamel on the liner falls off due to violent collision), there is no problem in using the enamel liners for more than 15 years.