water source heatpumps

jay_3

i'm looking to replace existing 10.9 eer water source heatpumps w/ 13.6 eer units. is there a formula to calculate the operating cost savings we should expect.(%)
thanks in advance for the feedback.

jay.

Wayco Wayne_2

I believe

that the EER is how many btu's of cooling an A/C can provide for each KW of electricity used. The math should be pretty simple to figure out your savings.

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JimGPE_2

Pretty much....

EER is BTU/hr output divided by Watts input. Not kW. That would have been pretty obvious when you went to do the math, but I thought I'd mention it.

Anyway, EER1/EER2 = Watts2/Watts1, assuming the BTUH output is the same.

Now all you need to do is figure out how many BTU's you go through in a given year, convert it to kWh, convert that to dollars and you've got it.

Provided you say it really quickly like that, it sounds easy.

jay_3

jim based on what you're saying. the savings would be 20%
10.9 eer/13.6 = .80. is it that straight forward?

thanks, jay