[Greenbuilding] FW: Takagi Water Heaters and Lime

[Lawrence Lile]

Here is what Takagi has to say.  There was an attachment that won't go
out to the List, if you want to see it I'll send it offlist.  Here is
the relavant paragraph about hard water:
 

			B. Water hardness is a serious concern in a
Flash Tankless Heater due to heating water at such a fast rate. The
process is causing scale to fall out in the water at a rate that Tank
Hot Water Heaters hold a lead of lasting longer. 

			
		1.	a. Hardness range from 1gpg to 10gpg is a
concern to have a water softener installed. It takes as long of a period
of time for a water softener to remove hard water scale as it took to
build up. 

					b. Hardness range from 10gpg
to15gpg should have an advanced 

					lab water analysis done. Other
elements in the water that can be a concern. 

					c. Hardness range from 15gpg and
above is recommended to have an advanced lab water analysis. 

 
They recommend water softeners if your water is harder than 1 grain pr
gallon.  That's pretty soft water!  On the other hand they seem to
indicate that a water softener can "fix" a limed up tankless heater,
presumably only up to a point.  
 
--Lawrence
 

________________________________

From: tech [mailto:tech at takagi-usa.com] 
Sent: Wednesday, September 06, 2006 2:25 PM
To: Lawrence Lile
Cc: 'Jun Aiso'; 'Koji Matsumura'
Subject: RE: Request for Assistance from the Technical Department



Lawrence,

            Yes hard water can cause the heat exchanger to fail. If you
are worried about hard water I would recommend looking into a water
treatment system of some sort. I have attached a document for you about
water quality to better assist you in the requirements that we have for
the heaters.

 

Contact us again if any further assistance is needed. Thank you.

Takagi Industrial Company, Inc USA

5 Whatney

Irvine, CA 92618

888-882-5244

949-770-3171 (fax)

www.takagi.com
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Data\Microsoft\Signatures\www.takagi.com> 

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Data\Microsoft\Signatures\www.takagi.com>