[Greenbuilding] Baxi Luna question

[Carmine Vasile]

Linda: There are many schemes & systems designed to conserve water wasted 
while waiting for hot water to arrive at a fixture. The best save both 
energy & water. Utilities, especially electric utilities, usually don't 
recommend such systems and have lobbied DOE to deny them EnergyStar labels 
for obvious reasons.

For example, I have a 15 kW tankless electric --with no Energy Star label -- 
that is equivalent to an 80%-efficient tankless gas heater having an input 
of 64,000 Btu/hr. My DHR system uses a Model G3-60 GFX that recycles about 
60% of the heat wasted down a shower drain by preheating all incoming water 
as illustrated @ http://www.gfxtechnology.com/Ins-Video.html.

This reduces the amount of hot water supplied by the water heater and speeds 
its response time by requiring less power to heat it in the first place --- 
thereby saving both water, power & energy.

A few such systems are discussed in "Dampers, Reclaimers, and Pumps--Oh My!" 
@ http://homeenergy.org/archive/hem.dis.anl.gov/eehem/97/970714.html.

Others may be found by searching: "hot water consumption", "recirculation 
loops", "water conservation" @ 
http://homeenergy.org/archive/hem.dis.anl.gov/eehem/feat_cats.html.


>From: "Linda Lloyd" <greenshelter at madriver.com>
>To: "Greenbuilding" <greenbuilding at listserv.repp.org>
>Subject: [Greenbuilding] Baxi Luna question
>Date: Tue, 12 Jun 2007 19:48:00 -0400
>
>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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