Zhigao is a designated procurement brand of the central state organs, and its products have been successively adopted by major global projects such as "Athens Olympic Games", "Shanghai World Expo", "World Universiade" and "Rio Olympic Games". It is mainly engaged in air conditioning business and is the main brand of low-end air conditioners. Because there are many similarities in the principle of air conditioning and air energy water heaters, Chigo also has a good performance in air energy water heaters.
 
Chigo has launched four series of brands, including KF60, KF100, KFD70, KJRSD four series of heat pump water heaters. Of these, only the KJRSD is an all-in-one design with a level 4 energy efficiency. The KFD has an electric-assisted function, but it only has an efficiency of 5 and a performance coefficient of 3.4, which is the lowest in the industry. KF60 and KF100 are not much different, both are level 2 energy efficiency, KF60 has two options of 150L and 200L for smaller size, and KF100 has two large-capacity options of 260L and 320L, with a performance coefficient of 4.
 
The coefficient of performance (COP) is the most important parameter of an air energy water heater and determines the energy efficiency level of the product. As a porter of ambient heat, air energy water heaters can generally carry 3-5 times the heat with one piece of electricity, so they will be more energy-saving than electric water heaters that produce one heat for one electricity. The coefficient of performance represents the ratio of heat production to electricity consumption, which can be simply understood as saving several times more electricity than an electric water heater, so there is a big difference between the level 5 energy efficiency with a COP of 3.4 and the level 1 energy efficiency with a COP of 4.2. It is not recommended to purchase a low coefficient of performance product such as Chigo's KFD series.
 
KF60 is an ideal choice, the 150-liter capacity of KF60-150L products is priced at about 4,000 yuan, and only Chigo has achieved level 2 energy efficiency among similar price products. The product adopts an externally wound copper tube heat exchanger, with a compact inner tank design and uniform heating exchange, and this water and electricity separation structure can also greatly reduce potential safety hazards. The water heater is 50 decibels quieter, which is slightly higher than the hum of a refrigerator when it is running, and is in the middle of the industry. The working environment of the heat pump host is -7~45°C, and it cannot be started if it exceeds this range, so the northern family can only install it on the indoor balcony. Chigo air energy water heater is guaranteed for 6 years, and enjoys the service of delivery to the home and township.