Smith G-8 Question for Steamhead

Rod

Hi Steamhead-

I've been thinking about this since the discussion the other day on the Smith G-8 and after seeing your always excellent work on the "Snow Man" replacement.

 Boiler Pro's last article has really had me thinking. From a practical stand point, how far can you downfire a Smith G-8 ?  (or even a Slantfin ?)  If you sized your new boiler the normal way (attached EDR + Pickup Factor) could you then downfire a Smith G-8 (with a gas power burner) to explore the "lower limits" ?

As always, thanks for your input.

- Rod



. For those who haven't read Boiler Pro's article, it is very worthwhile reading and VERY thought provoking.

<a href="http://www.heatinghelp.com/article/11/Hot-Tech-Tips/1551/Taking-Another-Look-at-Steam-Boiler-Sizing-Methods-by-Dave-Boilerpro-Bunnell">http://www.heatinghelp.com/article/11/Hot-Tech-Tips/1551/Taking-Another-Look-at-Steam-Boiler-Sizing-Methods-by-Dave-Boilerpro-Bunnell</a>

The Steam Whisperer (Formerly Boilerpro)

On a Slantfin TR-40..

I have a modulating burner that currently bottoms out at about 75,000 input.  It is running alot of excess air with the firing efficiency at about 84% IIRC.   On a TR-70  I have a mod burner that I believe is getting down to about 100,000 input (the meter was so big for the 1,200,000 weil we replaced that I had a hard time clocking the meter). 

Steamhead

Possibly

We haven't really tried it- but then, ours are well matched to the systems we installed them in.



I would assume the usual precautions apply, such as maintaining a proper stack temp and not letting the excess air get out of hand.

Rod

Thanks

Gentlemen- Thanks for the input!  I always learn something from reading your posts!

- Rod