[Greenbuilding] boilers

[George J. Nesbitt]

Of course, its only money, and you can't take it with you, that is if 
you have the money.
But I don't think it should have to be twice as expensive.

The benefit to going to a high efficiency boiler is two fold. (90% or 
greater AFUE).
1st. The Environmental benefit is lower gas use, and lower greenhouse 
gases, and global warming.
2nd. Lower infiltration for makeup air, also holds it's efficiency at 
lower outdoor temperatures.

Does you current boiler heat only, or does it also supply your domestic 
hot water?
How is the heat distributed in your home? baseboard, radiators, fan 
coil, infloor?
How "efficient" is your house, heat load, infiltration?
Are you comfortable?

These questions will effect what might be the best solution, and the 
economics.

If your house is uninsulated and leaky, and you heat it comfortably, and 
the current system is inefficient, you spend lots of money, and can save 
lots of money by going to "high efficiency", you can save way more by 
first making the whole house efficient.

dee mahan wrote:

>We're thinking about getting a new gas boiler to replace our very old 
>HydroTherm that was here when we got the house 1 year ago. (operating 
>efficiencyestimated - depending on plumber who's doing the estimating - at 
>55 to 75% efficiency). We are getting quotes of about $5,000 to get & 
>install a new boiler rated at about 85% efficiency - for the high efficiency 
>boilers, we are getting quotes of about $10,000. Is the high efficiency 
>really worth the extra costs (from both financial and environmental 
>perspective)?
>
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