thermomax vs flat plates [RE-wrenches]

[Brad Bassett]

All of the systems I've installed in the past 10 years have used a PV 
direct pump, El Cid mostly. I've used both external heat exchangers, 
made myself but similar to the hot rod, or stainless tanks with internal 
exchangers which is fine with the clean water we have here. The 
stainless tanks are expensive but should last just about forever. The 
two manufacturers of stainless tanks were in Canada, one's gone, but now 
I know of some in the US also. Viessmann (which makes a dual internal 
heat exchanger tank!), SuperStor, and Tam from Canada.

I'm planning to use the dual heat exchnager tank in my new house for an 
interconnected solar DHW and radiant heat system. Any ideas on boilers 
or water heaters for propane backup? The efficient boilers are way 
expensive and too big for my super insulated house.

Brad Bassett


matthew tritt wrote:
> Jay and Brad,
> 
> Yup, I've sold a couple of systems using the Heliodyne chrome panels. 
> They
> are indeed top quality, as is the entire system. My pref. is the 
> PV-direct
> powered closed loop system with external heat exchanger at the tank. No
> freezing problems, no controllers to go South, no internal exchangers to
> crap out. Very nice systems.
> 
> Matt
> 



Brad Bassett
Schott Applied Power 
Tumwater, WA office
bsbassett at earthlink.net

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