[Greenbuilding] Fresh air to boiler questions

[Peter Kidd]

There are many things to consider in ROI. With respect to energy cost,
approximately speaking the annual fuel utilization of your existing and
new device would determine the change in energy consumption, all else
remaining the same. AFUE includes flue loss, on and off cycle, Your
existing system is probably around about 60%, and a new one might be
around 90%. The fuel saving would be about a third of current
consumption (1 - existing efficiency/new efficiency).

On 2015-01-15 08:41 AM, Benjamin Pratt wrote:
> Norbert.
> There is no damper of any kind. I could add one, but there isn't much
> room beofre the brick chimney. Perhaps on the horizontal portion, if
> that is acceptable.
> However, I am still considering a new boiler. Does anyone have any
> input as to my original question--what would be the ROI on a newer
> more efficient direct vent boiler? I just found this link, but have no
> way to determine if it is accurate. 
> http://www.houseneeds.com/learning-center/hydronic-boilers-learning/boilers-heat-source-costs-example
> Thanks!
> Ben
>
>
>
>
> b e n j a m i n p r a t t
>
> professor art+design
> the university of wisconsin stout
>

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