I noticed the Englander is rated at 63% as an EPA default percentage for secondary burn stoves. Would it be somewhat accurate to say its more like 70-75%?
Actual englander 30-ncp efficiency
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Correct, the 63% is standard EPA rating. Maybe Corie has done some actual efficiency testing?
What is impressive is how cleanly these stoves run. The 30-NC is rated at 1.63 grams/hr. That's super for any stove and especially good for a non-cat.
What is impressive is how cleanly these stoves run. The 30-NC is rated at 1.63 grams/hr. That's super for any stove and especially good for a non-cat.
I don't think it would be accurate to say that the average household burns a non-cat stove like that at 75% delivered efficiency......there is a reason for the default efficiency of EPA.
Real world is very different than EPA. I would guess that most non-cats come in at about 65% if you want to use a real-world value.....maybe lower. Cats might come in at the same, although higher initially (when new). So use 70 for cats and 65 for non-cats (maybe).
Remember to adjust wood for moisture content! It is common for folks to take the BTU content - maybe 8500 btu per pound, and then multiply it by the efficiency. Example: 65% efficiency=5500 BTU out per pound? No.....
The real figure is, at about 20% moisture, 7,000 BTU per pound. Taking that at 65, you have about 4500. That is honestly almost a best case scenario, as most people don't have wood at 20% constantly.
Real world is very different than EPA. I would guess that most non-cats come in at about 65% if you want to use a real-world value.....maybe lower. Cats might come in at the same, although higher initially (when new). So use 70 for cats and 65 for non-cats (maybe).
Remember to adjust wood for moisture content! It is common for folks to take the BTU content - maybe 8500 btu per pound, and then multiply it by the efficiency. Example: 65% efficiency=5500 BTU out per pound? No.....
The real figure is, at about 20% moisture, 7,000 BTU per pound. Taking that at 65, you have about 4500. That is honestly almost a best case scenario, as most people don't have wood at 20% constantly.
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