Do they make a 95% efficient condensing steam boiler?

"m Ransley" wrote in message
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You boiler is probably 70-80% efficent on steady state running but
overall 60% efficient, there are 95% efficient condensing boilers out,
you could save 40% with a new unit, 10-25% with top line windows, and
depending on how much insulation you can shove in 5-40%. I heat 1800sq
ft zone 5 to -15f, last years yearly Ng was 465$, and everything is Ng.
You have alot of room to improve but it costs to do it.