No, it doesn't get that warm. Water has a very high heat capacity, and it only heats a few degrees above ambient when used in a heat exchanger for an AC unit. Certainly not at a temperature where the difference would be useful to heat water.
I'd point out that the additional resistance of the heat exchanger coil in the hot water heater would also put a strain on the raw water pump for your A/C system, and that most are undersized as it is and would lead to them failing sooner.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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Still—DON'T READ THAT POST AGAIN.