BigJohn wrote:I did not get to do the heat loss calculation yet.
Before the coal stove, new windows, and insulation the oil boiler keep the heat with no problem.
The oil boiler is a New Yorker 122
I will be taking the oil boiler out. Don't want to build another chimney .
I would like to have a duel fuel option. Oil tank and line is here.
I would like to hear pro and cons of Keystoker Kaa-4-1 and Leisure Line WL 110
I'm learning here.
The New Yorker website says the IBR (net of pickup) output of the "122" oil-fired boiler (FR-122-W) is 115k btu/hr. That reflects a firing rate of 1.1 gph, which translates to about 153k btu/hr gross input and 132k gross output.
115k btu/hr translates to 767 s.f. of installed radiation. That's larger than the recommended load of a KA-6, but slightly smaller than its net theoretical capacity. It should be straightforward to determine whether the 122 has been sized to the s.f. of installed radiation (plus DHW load), or whether it has excess capacity that might permit comparable heating performance from a smaller boiler using the current installed radiation. If it does not have such excess capacity, heat loss analysis could indicate whether some portion of the installed radiation is not needed. Absent persuasive evidence that the boiler and/or the installed radiation are substantially oversized, I would not be optimistic about the ability of a small boiler to give satisfactory performance here. If anything, I believe a coal boiler should be sized with a capacity margin to compensate for the numerous factors that can cause it to operate at lower than its rated output.