[Greenbuilding] Baxi Luna Question

[steve at slorevo.com]

Thomas:

We have a Baxi Luna providing DHW and radiant heating for (currently)
450 SF, to be expanded to 900 SF later this year. We don't have a
holding tank or expansion tank. It works great. Although I'm not a
plumber, as far as I know, the Baxi Luna has an expansion tank
internally. 

I would agree with George that your plumber underbid the job--the retail
price on just the Baxi is $3000+ USD, wholesale would be about $2000 I
suspect. Seems to me you need to find a new plumber.

Regards,
Steve Mann

> -------- Original Message --------
> Subject: Re: [Greenbuilding] Baxi Luna Question
> From: "George J. Nesbitt" <geoedb at idiom.com>
> Date: Mon, July 10, 2006 9:09 pm
> To: greenbuilding at listserv.repp.org
> 
> Yes your HVAC contractor is partly right. But it doesn't cost $4000 to 
> add an *expansion* (buffer) tank (needs to be installed anyway) and a 
> *buffer* (holding) tank (a small electric water heater tank probably 
> less than 10 gallons in size). The plumber underbid the job and is 
> trying to make up for their lack of experience.
> 
> George J. Nesbitt
>
> #####

> Eggert, Thomas L wrote:
> 
> We were to put a Baxi Luna combined boiler into a new house that we
> are building.  It was to supply both the domestic hot water and a
> multi-floor radiant system.
> 
> The plumber that our builder found had no experience with the Baxi
> Luna system and gave us a bid for about $3000.  He now wants an additional
> $4000 because he is telling us that the system has too much capacity
> for our uses and that he would need to install both a buffer tank and a
> holding tank.  It would seem that he wants to convert a tankless
> system to a tanked system.  It does not make any sense.
 
> Tom Eggert