[Greenbuilding] Baxi Luna question

[Carmine Vasile]

Before you spend a few grand for a solar heater, may I suggest that you 
visit http://gfxtechnology.com/NEU-Solar.pdf. It summarizes a decade old 
case study of a solar water heater to which a GFX Power Booster was added 
and proves a DHR system offers comparable savings for a much lower 
investment.
     For over a decade, I've been trying to convince solar water heater 
installers to include DHR to maximize savings; to no avail because rebates 
don't cover the cost of DHR.

>From: Ward Edwards <ward at buildgreen.ca>
>To: Linda Lloyd <greenshelter at madriver.com>
>CC: Greenbuilding <greenbuilding at listserv.repp.org>
>Subject: Re: [Greenbuilding] Baxi Luna question
>Date: Tue, 12 Jun 2007 20:05:31 -0400
>
>I have a similar problem with the Takagi, but it only takes about 30
>seconds to get hot water.  I have found that you only have to turn it on
>full to get the system started and then can turn down the flow while
>waiting for it to get to temperature (12 seconds according to the
>manual).  You have to figure out what the minimum flow rate is before
>the heater shuts off, which just takes a bit of practice.
>
>I intend to solve the problem by adding an active solar hot water system
>in front of the tankless heater and just use it to top up the heat when
>required.  You could also use one of those very small hot water heaters
>(about 10 gallons) as the preheat for the tankless, as it should be up
>to temp by the time the small tank is depleted.  You could add an
>insulation blanked to minimize the heat loss, and since it is so small,
>it shouldn't use much extra power.  Not a perfect solution, but would
>minimize water waste.
>
>Ward Edwards
>ward at buildgreen.ca
>
>
>Linda Lloyd wrote:
> > I have been in my new hosue about 2 weeks - installed a Baxi Luna due to 
>energy efficiency
> >
> > I am a bit distressed that in order to get hot water, I need to turn the 
>water on full blast then wait 3-4 minutes wasting lots of water for it to 
>make it the 5 feet to my workshop sink (kitchen sink at other end of house 
>not yet hooked up)
> >
> > if I start with cold water, then turn lever over to hot, will not get 
>hot, or if I try to turn down the flow, the hot stops
> >
> > any suggestions ??? seems a little crazy to save propane but waste all 
>that water
> > Thanks
> > Linda Lloyd
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