I am planning to purchase a single AC that would operate on my Diesel generator. My Generator is a 5kVA , 8 HP air cooled one. I want to know that If I have to run only one AC on the generator shall I install a 2 Ton Split AC or a 1.5 Ton Split AC? Also I Want to know the diesel consumption by the generator per hour. closed as off-topic by jippie, Scott Seidman, uint128_t, Daniel Grillo, PeterJ This question appears to be off-topic. The users who voted to close gave this specific reason:"Questions seeking recommendations for specific products or places to purchase them are off-topic as they are rarely useful to others and quickly obsolete. Instead, describe your situation and the specific problem you're trying to solve." – jippie, Scott Seidman, uint128_t, Daniel Grillo, PeterJIf this question can be reworded to fit the rules in the help center, please edit the question. The cooling capacity is not relevant. The power consumed is important, but you also need to know the current.

AC motors need more current than the minimum required for the power consumption. You also need to make sure you have the right voltage and whether you need single-phase or three phase. The KVA for a motor that consumes 1438 watts will probably be between 1.7 and 2.6 KVA. Watts = VA X Power Factor It is customary for engine generator sets to be designed for 0.8 maximum power factor so 5000 VA X 0.8 = 4000 W would be expected. Power Consumption and cooling capacity. Which one determines the value I am interested in? For an Air conditioner of 1.5 ton ,the power consumption is 1438 wattt and cooling capacity is 5,050 W. Your air conditioning unit works on the principle of a "heat pump". In your case electricity is used to drive the pump. According to the rating plate it will consume 1,438 W of energy while pumping 5,050 W of heat. It is common to quote the coefficient of performance (CoP) for heat pumps as \$ \frac {heat~moved}{electrical~input} = \frac {5050}{1438} = 3.5 \$ which is reasonably good.