I just picked up a used "The Elm" stove made by Vermont Iron Works. They really intrigue me--I think they're gorgeous and I love the Pyrex pie plate for the window.......I'm looking forward to "restoring" it and getting it burning.
Anyway, I bought it from the original owner who still had the owner's manual, sales brochures, etc. In reading through the OM I came across this section: "Greenwood vs. Drywood" In part it states:
"It is not always true that the drier the fuel the less creosote will form in your chimney. In a report, 'Creosote and Wood Moisture Content' by Dr. Jay Shelton, it is shown that wood fuel with a moisture content below 15-20% will actually increase (in some cases) the amount of creosote accumulation. The reason for this is that since dry wood requires less air for combustion, people will turn down the air controls down and severely restrict the air flow. On the other hand, stove operators know green wood usually requires a substantial amount of air to burn so they open up the air controls. When air controls are opened up the incoming rush of air will do three things; 1. It will draw heat up the chimney thus creating a warmer flue, 2. It will dilute the smoke, 3. it will force the smoke to pass through the flue quickly. All three of these conditions will aid in preventing smoke from condensing on the inside of the flu."
I'm not sure of the date on the manual but my Elm stove was made in 1984, and they had catalytic models available then too, so it's not like the idea of stove efficiency was off the table..........still an interesting passage that may go a long way towards explaining why so many people stubbornly still believe that green wood is "better."
NP
Anyway, I bought it from the original owner who still had the owner's manual, sales brochures, etc. In reading through the OM I came across this section: "Greenwood vs. Drywood" In part it states:
"It is not always true that the drier the fuel the less creosote will form in your chimney. In a report, 'Creosote and Wood Moisture Content' by Dr. Jay Shelton, it is shown that wood fuel with a moisture content below 15-20% will actually increase (in some cases) the amount of creosote accumulation. The reason for this is that since dry wood requires less air for combustion, people will turn down the air controls down and severely restrict the air flow. On the other hand, stove operators know green wood usually requires a substantial amount of air to burn so they open up the air controls. When air controls are opened up the incoming rush of air will do three things; 1. It will draw heat up the chimney thus creating a warmer flue, 2. It will dilute the smoke, 3. it will force the smoke to pass through the flue quickly. All three of these conditions will aid in preventing smoke from condensing on the inside of the flu."
I'm not sure of the date on the manual but my Elm stove was made in 1984, and they had catalytic models available then too, so it's not like the idea of stove efficiency was off the table..........still an interesting passage that may go a long way towards explaining why so many people stubbornly still believe that green wood is "better."
NP