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[Mr. Maple]

  Going through the farm paper this morning,saw an ad for Orlan Furnace,claiming 92-93% efficiency,now that’s pretty high!

[coolidge]

http://www.newhorizoncorp.com/products/wood-boilers/eko-line-boiler/

[E Yoder]

Probably using a different test method. You'd have to condense to get that using the test method the EPA uses. I don't think EN303.5 factors in moisture... I forget but it's different.  Not meaning anything negative, it's just confusing when there are several test methods in use.

[BIG AL]

the pricing is appealing

[mlappin]

It would be interesting to see what test method was used and who actually tested it, a claim of that high efficiency actually carries some weight if done by an independent lab, if that’s just the companies claim then all kinds of fuzzy math can be used to come up with that.

It’s been discussed before, I can’t remember where but even the best gasser is gonna but up against an hard upper limit unless it’s condensing like a gas furnace or boiler, I can’t see that working very well unless you can remove all the particulates and fly ash before the condensing part of it.

[RSI]

It is using the lower heating value.
http://articles.extension.org/pages/38753/what-is-the-difference-between-the-higher-heating-value-hhv-and-lower-heating-value-lhv-of-a-biomass