[Greenbuilding] [BULK] Tankless HW and hard water

[Keith Winston]

Hmmm, I can't find any links to that, are they still in business? 
Interesting strategy. Is it one with a pump that constantly (or often) 
circulates water? I saw a tank/tankless combo that works like that, 
sorta interesting...

Keith


Dr. C.F. Vasile wrote:
> Keith: The tankless I own has 3 copper heat chambers and 3 commercial 
> heating elements; an Acutemp Model C-150. The elements expand & 
> contract to loosen lime deposits that are continually flushed away. I 
> too had my doubts, so I bought 3 element for back-up. They're still in 
> the box. Carmine
>
> ----- Original Message ----- From: "Keith Winston" 
> <keith at earthsunenergy.com>
> To: "Greenbuilder list" <greenbuilding at listserv.repp.org>
> Sent: Wednesday, September 06, 2006 1:43 PM
> Subject: Re: [Greenbuilding] [BULK] Tankless HW and hard water
>
>
>> It's not obvious to me why this would be so. Anyone care to share
>> thoughts? Lime formation won't tend to happen below, I think, about
>> 160F. But surely in a tankless there are hot spots that exceed that?
>> Maybe that's the answer right there? Or perhaps it doesn't form well in
>> a stainless steel environment...
>>
>> Keith
>>
>>
>> Dr. C.F. Vasile wrote:
>>> Yes. I've been heating my house and water with a 15 kW Tankless 
>>> electric
>>> heater since 1996. I live in Patchogue, NY where cold water 
>>> temperatures
>>> drop below 45F in January. We have very hard water and have had no 
>>> problem
>>> with calcification. In contrast, the tankless coil in our obsolete oil
>>> burner used to "lime-up" in 6 months or so. When it did, its 1.5 
>>> gallon per
>>> hour firing rate (oil) couldn't sustain a low flow shower and its
>>> water-heating efficiency dropped below 25%.
>
>
>
>
>

-- 
Keith Winston
Earth Sun Energy Systems
3927 Madison St.
Hyattsville, MD 20781
301-980-6325
keith at earthsunenergy.com
www.EarthSunEnergy.com