In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Note, I am editing this post to reflect changes to the EDR of the radiation.
For my Chapel project I need some recommendations for a wet-based gas boiler, for a stone chapel with a mostly intact Dunham 2-pipe system. The drum shaped trap is still on the return, but the old leaking boiler has been superceeded years ago by a badly installed furnace.
The ground floor has 757 ft of radiators, and 207 KBTU heat loss.
The basement has 162 ft of radiators, and 63 KBTU heat loss.
The total EDR is 919 ft, and the total heat loss is 270 KBTU.
As the Dunham system may have orifices installed (or could be installed), I wonder whether to get a boiler which matches the EDR, but which could be dialed back to the heat loss, if we get all the orifices in place.
How difficult is it to derate a gas burner 33%? Assuming the use of a combustion analyzer, is this a matter of adjustment, or changing of parts?
Another difficulty is the lack of local representation here in Nebraska of all the makes I see mentioned on this site. --NBC