S9(14TH) is 1372W gives you 4681BTU/h or 1372J/s or 0.39TR (Tons of Refrigeration) of cooling load.

but using air-conditioning unit will use a lot of electricity which will add up to your operating cost of the miners. You might end up losing money due to electricity cost. It will be better to vent it out of your room using a fan and/or inducing colder air to your miner.

S9 gives you around 250cfm of hot air.