On non-Inverter ACs, I only need to use the power input (e.g. 800W) to calculate my energy cost for a 12-hour usage. (800*12/1000 = 9.6kW-hr)
On Inverter ACs though, I know they don’t operate at 100% all the time, and most of the time the only information I get is their cooling capacity (e.g. 1hp ≈ 746W) and their EER (e.g. 12.2 kJ/hW).
How do I use these to get a rough estimate of the energy cost?
A power meter is like 10 bucks. If you really want to know, that’s probably the easiest way.
Too many variables. Energy usage isn’t constrained to efficiency of the hvac.
What’s the energy consumption of your current unit? compare that equipment to a newer model to get an idea.
Depends on your cooling requirements? Full blast it is the same as before. Anything less proportionally less.
https://en.wikipedia.org/wiki/Seasonal_energy_efficiency_ratio
Wikipedia is almost LMGTFY for this type of thing.
