[Greenbuilding] Max Temp Storage Water Heaters+TemperatureSensors

[Clarke Olsen]

I have had good results with Eemax. I installed a 95XT (9.5kw) where  
it is used for showers with incoming ice cherry cold town water,
and it works fine. In another location, I tried a 65XT (6.5kw), and  
it is a tad light. "T" models are temperature selective.
What you want to look for is the lowest actuating flow, like 1/2 gpm.
Clarke Olsen
373 route 203
Spencertown, NY 12165
USA
518-392-4640
colsen at fairpoint.net




On Feb 2, 2011, at 12:59 PM, elitalking wrote:

> Can you recommend a brand of electric tankless heater.  I am  
> looking to be able to get 120F.  I could probably make due with  
> less.  This would not allow me to mix cold creek water during  
> draught conditions.  Therefore, I would need to use only cistern  
> water.  The ambient water temp is 55F.  To get to 120, I need a  
> rise of 65F.  I suppose I could slow the flow rate to get a higher  
> temperature.  The normal flow rate is likely around 3 gpm.
>
> Thanks for your input.
>
> Eli
> ----- Original Message -----
> From: natural building
> To: Green Building
> Sent: Wednesday, February 02, 2011 11:04 AM
> Subject: Re: [Greenbuilding] Max Temp Storage Water Heaters 
> +TemperatureSensors
>
> Eli, this begs the question: if you are already replacing the water  
> heater, why not get an on-demand electric tankless system that  
> supplies water to the bathroom only when you want it?  More compact  
> than any tank so you can put it somewhere convenient and it would  
> eliminate virtually all the unavoidable standby losses associated  
> with a tank?
>
> Regards,
> Steve Satow
>
> www.naturalbuildingsite.net
> naturalbuilding at shaw.ca
>
> On 2-Feb-11, at 7:41 AM, elitalking wrote:
>
>> I am replacing a water heater that is in a location that is  
>> inaccessible for servicing.  We have been in the practice of  
>> turning the heater on when we are getting ready for a bath to  
>> avoid the standby heat losses
>> (Energy $$) from continually heating the water.
>> I want to know the maximum temp that typical storage electric  
>> water heater can safely accommodate.  Since we are not storing the  
>> heat, the higher temperature is not an energy penalty.  The higher  
>> temp allows for a smaller tank.  We are separating the kitchen use  
>> from the bathroom.  Tank will located next to the bathtub.  We  
>> will have an on off switch at the tank.
>> Does anybody know of a heat sensor and or sound indicator when the  
>> water reaches a set temperature? Currently we allow more time than  
>> is necessary because we want to avoid being too cool.  It sure  
>> would be nice to know what is going on.
>> We could use a 20 gal tank for 20 gal bath and set at temp for  
>> bath.  However, we use a cistern.  During dry spells (most of the  
>> time) we mix creek water in bath to reduce water usage off of  
>> cistern.  Results of my spread sheet below show that 20gal bath  
>> can be supplied with 10gal HW tank at 185F.  Can a normal  
>> temperature relief valve store that kind of pressure-temperature?
>
>
>
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