[out_of_protocol]

I blessed to live in a country that uses kilowatts. That works wonderfully (and advertised as such) for AC units

[quickthrowman]

One ton (HVAC unit) is 3.5kW of heat moved for each 1kW of input power under relatively ideal conditions, assuming a max COP of 4. The unit chosen to represent the amount of heat that can be transferred is irrelevant, you get the same information.

[dzhiurgis]

So it's a gallon of kilowatts?

[anotherhue]

Four imperial kiloquarts.

[Ekaros]

Kilowatts as in power consumption or as in refrigeration or heating power? AC is somewhat not straightforward.

[Gigachad]

It is pretty simple and standardized. The spec sheet will list the cooling and heating output in kW, and then also the input in kW. The number they have displayed most prominently is the cooling output while the others will be in the specs.