# Thread: help calculating Cooling Rate (Units/Hour)

1. Regular Guest
Join Date
Jul 2010
Posts
25
Post Likes

## help calculating Cooling Rate (Units/Hour)

Rate = Voltage * Current / 1000

Example:

With the A/C system running, the voltage is 223 VAC and the current is 21.3 Amps, the Cooling Rate is 4.75

Can someone tell me what voltage and current is used by my AC unit?

Thanks

2. New Guest
Join Date
Aug 2010
Posts
1
Post Likes
Well the "rate" you've specified is power, and the units it's going to return is kilowatts (kW). The voltage the unit will see will vary somewhat, but should be around 208. However, the amp draw will vary depending on the load, particularly with the compressor (your fan motor should have a relatively constant resistance).

Are you looking for the peak power for the unit? Or are you actually looking for the rate of cooling (btu/hr) that the unit will be able to provide?

3. Regular Guest
Join Date
Jul 2010
Posts
25
Post Likes
I need to get kW/h for my AC system to enter in to my thermostat. (baycontrols)
With the existing value (3.432kW/h)and electricity rate of \$0.15 it shows, that it costs me \$4-\$5 a day to run the system. I think the 3.432kW/h is too low, so wanted to get a professional opinion.

Thanks

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•

## Related Forums

The place where Electrical professionals meet.