[Greenbuilding] hot water

[Clarke Olsen]

With a .25 actuation, Hubble sounds great. The downside is that a  
whole house unit skips one of the positive aspects of demand
heaters: you can put them right next to the use, saving all that  
water that cooled off in the pipe. With a smaller unit, like the Eemax,
you can put a $210 unit in each bath rather then one $900 unit in the  
hall closet or basement.
Clarke Olsen
373 route 203
Spencertown, NY 12165
USA
518-392-4640
colsen at fairpoint.net




On Feb 2, 2011, at 1:56 PM, natural building wrote:

> Personally, I would recommend the Hubbell heaters ( http:// 
> www.buytankless.com ) but they may be more than you need in your  
> situation. I have been using the biggest (28 kW whole-house) unit  
> for a couple of years now. It is extremely well designed and, for  
> the most part, operates very well. It can easily handle 120F or  
> more and can be set to whatever outlet temp you want (within reason).
>
> The reason I suggest that it might be more than you need is because  
> it has the most accurate and sensitive flow meter of all the  
> different manufacturers ( 0.25 pgm where most others are either .5  
> or higher). This may not be of any use in a bathroom application.  
> It also is one of the few units that can accept modulated input  
> water temperature, so you can use it in a re-circ system and it  
> will adjust its output to suit the input. If your input temp is  
> always the same, then this might be redundant.
>
> It also has some other very intelligent design features that, IMO,  
> make it stand out from the crowd. Things like 16" mounting hole  
> spacing (you'd be amazed at how few of the others have thought of  
> this) and 'Sharkbite' connectors for the inlet and output pipes,  
> which make it very easy to install and maintain.
>
> The downside with tankless systems is that they cannot 'buffer' the  
> water temperature, so if the demand changes, the temperature  
> changes, albeit briefly as the system adjusts. But, for a single  
> bathroom this may not be a problem.
>
> Regards.
> Steve Satow
>
> www.naturalbuildingsite.net
> naturalbuilding at shaw.ca
>
>
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