Is the management and maintenance fee of Times International Air Conditioning reasonable?

Central air conditioning is different from household air conditioning. When general household air conditioners are sold, the warranty period is 3-6 years, but the general warranty period for central air conditioners is 1-2 years. Because the central air-conditioning system is more complicated and there are many easily damaged parts, after the general warranty period, the users of central air-conditioning, that is, the owners, will sign maintenance contracts with air-conditioning manufacturers or distributors. This is paid for, so there will be a charge. In return, the service is the maintenance and maintenance of air conditioners, as well as the cleaning of air conditioning pipes and air conditioners. It is not surprising that this fee is ultimately shared by all owners, but the property fee is paid every month, and this fee is usually paid by signing a contract once a year. If this item is included in the property fee, it is a double charge.