Air conditioning and heating how many degrees the most appropriate - human health Temperature 1. indoor and outdoor temperature should not be too large, the winter is best to keep indoor air temperature is set higher than the outdoor 8 ℃. If the indoor and outdoor temperature difference is too large, people in the cold and hot environments, easy to colds; for the elderly and people suffering from high blood pressure in the central air-conditioning manufacturers, indoor and outdoor temperature not to be too large. Because the indoor temperature is too high, the body vasodilation, and then if suddenly to the outside, suddenly shrink blood vessels, the elderly and patients with hypertension disorder causes the occurrence of cerebral blood circulation, easily induced stroke. 2. doors and windows closed when the air conditioning, a long time can cause central air conditioning indoor hypoxia Which is good, bacteria, virus will take the opportunity to build up a lot, so the air conditioning every time to open more than two hours should be stopped, and windows ventilation. Owners in the choice of home central air conditioning central air conditioning installation, we must note the following: according to their own chamber structure, choosing the right home central air conditioning. Depending on the space matching supply 220V or 380V, for home central air conditioning. According to the purpose and function of the room for home central air conditioning energy control. Note that the brand home central air conditioning units, one to choose a production base of manufacturers, so that the service is guaranteed. Design and installation of home central air conditioning, home decorating effect must be considered, so beautiful and coordination. Design and distribution of home central air conditioning system, air conditioning professionals must check central air conditioning prices, central air conditioning Shiquan, Xi'an Hao Hao Electrical and Mechanical Services provided by Xi'an Electrical and Mechanical Technology Limited. Xi'an Hao Electrical and Mechanical Technology Co., Ltd. (www.029hfkt.com/)(www.029hfkt.com) strong, credible, in Xi'an in central air-conditioning industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Electrical and Mechanical Xi'an Hao into the brilliant and you work for a better future!