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Greenbuilding Archive for April 2002
237 messages, last added Tue Nov 26 17:26:51 2002

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[GBlist] Solar Hot Water, On Demand Water Heaters, and Hydronic Heating



Hello all.
This subject has been much debated on these lists but I'm going to inquire again.
I'm working on a second-story master bath addition in Seattle.  I'm exploring options for providing the upstairs heat with radiators or fan-coil units in the bedroom and closet areas and radiant floor in the bathroom, and looking at ways to provide that hot water and efficiently use it.  I'd like to get some feedback/recommendations/war stories/suggestions regarding the best way to approach this.
Right now, the components I'm considering are:
evacuated tube solar hot water vs. typical freeze-protected units
twin-coil electric storage tank and/or on-demand water heater
retrofit radiant floor on wood joists in bathroom 150sf
new fan-coil units, radiant panels, or salvaged hot water radiators for bedroom, closet, and study, total 700sf
GFX unit on bathroom shower (which has two showerheads)
There is also a 90-gal 2-person tub.
 
Note that I'm not trying to engineer anything, only recommend a system to my client.
 
So what's the best system combination?  This is my first time to tackle these questions, and being an architect not an engineer I'm feeling more in the dark than I thought I was. 
 
Also, any contacts regarding radiant systems in the Seattle area would be greatly appreciated.
 
Thanks,
Kristian
 
 
Kristian Kicinski, Assoc. AIA
LEED Accredited Professional
VELOCIPEDE architects
206.529.2731