Section 3(4) in Technical Specifications of HVAC Ordinary Bus
4.0(A)HVAC System .- 4.1 The bus shall have heating, ventilation and air-conditioning system of appropriate size, type and capacity as prescribed under Para 4.9 and as per the operating/environmental conditions given at Para 2.3 and 3.2 for carrying up to 72 passengers. The nominal temperature of 23 to 25 degree centigrade must be achieved in the saloon before boarding of the passengers.
