General > General Technical Chat
Air Conditioner power ratings.
james_s:
Very roughly speaking you can assume the electrical consumption to be pretty close to 1kW per ton of refrigeration capacity. 1 ton = 12,000 btu/hr = 3.5kW. As someone already mentioned, it's just a units thing, you're not getting free energy, you're just measuring different things.
G7PSK:
I have tree air conditioners/heat pumps. two are rate at 3.5Kw output and one at 15 KW out. Not measured the power consumption of the larger unit as it was installed by an air con company just a couple of weeks ago and is hard wired in with the power supply outside. The two smaller units have 13 amp plugs fitted as supplied and I installed them myself. I have used them with a killawatt power plug and they vary between 400 watts to a 1000 watts consumption and typically use around 1.5 to 3 units of power over an 8 hour period, they are rated by the manufacturer as having 1KVA input the large unit is rated at 5KVA input come the summer when I can safely run it with the cover off the power supply I will use a clamp meter to check on actual power draw.
From what I have read you can expect about three and half time the heat power equivalent out for that put in.
james_s:
The power consumption will vary with head pressure, which will vary depending on the temperature of the condenser. The colder it is outside when heating or the hotter it is outside while cooling, the higher the power consumption will be.
G7PSK:
--- Quote from: james_s on December 18, 2020, 06:54:05 pm ---The power consumption will vary with head pressure, which will vary depending on the temperature of the condenser. The colder it is outside when heating or the hotter it is outside while cooling, the higher the power consumption will be.
--- End quote ---
also varies according to fan speed on the units I have as the units are inverter powered the fan speed is fully variable.
Ground_Loop:
My 4 Ton heat pump is pretty clear about the electrical requirements.
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