[RE-wrenches] offgrid system question

[jay peltz]

Hi Travis,

thanks for the great insite, this helps a lot.

So the higher the SEER number the more efficient the unit is.


thanks,

jay
On Aug 22, 2008, at 7:40 AM, Travis Creswell wrote:

> 1 ton = 12,000 BTU's
>
> SEER = how many BTU's per kW (Since you asked about "rough  
> electrical load"
> for this equation we're going to ignore the complexities for EER  
> vs. SEER,
> COP at varying outdoor temps and so on.  We'll leave that for  
> someone else
> to discuss if they desire)
>
> Plus you'll want to add approximately 150 watts per ton for the air  
> handler
>
> Assuming a 13 SEER AC unit the math is;
>
> 2.5 tons x 12,000 BTU's = 30,000 BTU's
>
> 30,000 BTU's/13 SEER= 2.3 kW
>
> 2.5 tons x 150 watts/ton for air handling = 375 watts
>
> For a total running kW of ~2.7.
>
> That's how I do it.  Doesn't mean it's the right or only way.
>
> Best,
> Travis Creswell
> Ozark Energy Services
>
>
>
> -----Original Message-----
> From: re-wrenches-bounces at lists.re-wrenches.org
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of jay  
> peltz
> Sent: Friday, August 22, 2008 9:23 AM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] offgrid system question
>
> Can someone tell me how to convert AC "tons" to rough electrical load?
> or is there a way?
>
> I've got a customer who is wanting to install a AC unit and they tell
> me its a 2.5 ton and uses 9000 watts.
> ( they haven't given me make or model yet)
>
> thanks,
> jay
>
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