Is a separate room required for the UPS room?

It's needed. For the relevant specifications, refer to: Design of heating, ventilation, and air conditioning systems for batteries – Code for Design of Heating, Ventilation, and Air Conditioning in Civil Buildings GB 50736 - 2012, 6.3.2. The placement of air intakes in a building’s overall exhaust system shall comply with the following requirements: 1. For air intakes located in the upper part of a room, unless they are used to exhaust hydrogen-air mixtures, the distance from the upper edge of the intake to the ceiling surface or roof shall not exceed 0.4 m ； 2 When used for exhausting mixtures of oxygen and air, the distance from the upper edge of the intake opening to the ceiling surface or roof shall not exceed 0.1 m; 3 When used for exhausting harmful gases with a density greater than that of air, for the exhaust openings located in the lower part of the room, the distance from their lower edge to the floor shall not exceed 0.3 m ； GB50058-2014, Code for Design of Electrical Installations in Explosive Atmospheres, 4) A confined area can be considered to have good ventilation if it provides at least 0.3 m3 of air per square meter of floor area per minute, or if the air is refreshed at least 6 times per hour. This ventilation rate can be achieved through natural ventilation or mechanical ventilation. GB 50055-2011, Code for Design of Power Distribution of General Electrical Equipment, 6.0.8—3: The charging area shall be well-ventilated; when natural ventilation is insufficient, mechanical ventilation shall be used, with at least 8 air changes per hour. Explanation of the provisions: According to the current national industry standard \"Code for Design of Telecommunication Special Buildings\" YD/T 5003, in a battery room equipped with explosion-proof acid batteries, the ventilation rate should be no less than 5 air changes per hour. With reference to the above provisions, and considering that more corrosive gases and hydrogen are generated when the battery is charged to a higher level, this specification stipulates that the ventilation rate should be no less than 8 times per hour. 【Non-hazardous area: Based on the calculation of hydrogen emission amount mentioned above, to reach 10% of the lower explosive limit, the battery needs to be charged continuously for over 33 hours.】 Typically, the charging time for a battery is 8 hours, so it is easy to meet the standards for non-hazardous areas. The regulations do not require ventilation here on an hourly basis; assuming that ventilation occurs once per hour, it is still possible to keep the hydrogen concentration below 10% of the lower explosive limit. 】 The requirements specified for the frequency of ventilation are unreasonable in the operating environment of data centers. 】 Code for Construction and Acceptance of Batteries in Electrical Installation Works GB50172-2012 3.0.7 The battery room shall be equipped with explosion-proof lighting fixtures and ventilation motors; the indoor lighting wires shall be installed concealed within pipes, and no switches or sockets shall be installed inside the room. Electrical design between batteries: \"Code for Construction and Acceptance of Storage Batteries in Electrical Installation Projects\" GB50172-2012, 3.0.7. The battery room shall be equipped with explosion-proof lighting fixtures and ventilation motors; the indoor lighting wires shall be installed concealed within conduits, and no switches or sockets shall be installed inside the room.

Generally, those in the higher power range have a separate UPS room

A separate UPS room is usually set up. SHT 3006-2012 Code for Design of Petrochemical Control Rooms: The main purpose is, firstly, electromagnetic isolation ； Secondly, the maintenance personnel for UPS and cabinets are also different, falling under electrical and instrumentation management respectively. It facilitates separate management.

The UPS must be in a separate room for easy management and maintenance.

For capacities of 10KVA and above, a separate power supply room is recommended – as specified in HG/T 20509-2014

I’m not very knowledgeable; may I ask what 10KVA refers to on that piece?

Where did I see the rule that it must be two characters?