Flo man really I didn't pull that number out of my ass so here is my source. Here it is.. My assesetment is that Ac wastes 70 percent cooling air... fuck it read
...The Ice Box is a safe and effective way to water-cool the air leaving your reflectors without adding a/c or more fans. It uses a water to air heat exchanger to water cool the hot air your reflectors produce. Water-cooling is much more effective and efficient than air-cooling, here's some science to prove it: Water has a thermal conductivity of 0.6 W/ (m*K) which is much higher than the thermal conductivity of air which is only 0.03 W/(m*K). Water also has a much higher specific heat capacity than air. What that means is water can absorb and remove from your garden 4 times the heat nearly 20 times faster than air! We aren't just talking about air cooling your reflectors, this goes for your air conditioning system too. Once heat is released in to your room the ability to efficiently remove that heat is lost. Air is only cooled with electricity whereas water can be cooled in dozens of ways with little or no energy. Further only 30% of the energy used in air conditioning is converted into usable cooling power, the rest is wasted. It doesn't take a rocket scientist to figure out that water-cooling will reduce your electric bill
Anyway enough said. Much success..