Evaporation Rate

[rob1640]

What evaporation rate should you be able to get out of a 2x4 pan and a preheater also over the fire?

[jtthibodeau]

My 2X4 will put out around 12 gallons per hour. More if the wood is kiln dry or close. I burn mostly pine with a little mixed hard wood. This year my wood isn't quite as dry as I'd like and I've seem my evaporation rate drop as low as 7 gph at times so, I'm splitting it smaller as I stoke the arch.

Hope this helps....

[StewieSugar]

If you ignore the 30-60 minutes for the thing to heat up, my homemade 2x4 is getting between 8 and 10 gph with wood (oak and ash) that is split fairly fine.

[Dill]

My 2x4 seems to be between 10-15 gph normally, its outside. My father in law got it to go through 140 gallons of sap in 6 hours yesterday. But he really got it hot, the front of the arch had white on it. Thats with old barn boards and a blower.
Mine has a 2x2 divided syrup pan a 2x2 raised flue pan and a preheater.

[Harken]

My 2x4 runs at 16-18 gal/hr (US) - flat pan, 3 compartment, pre heater pan on top burning plywood pallets.

[bobsklarz]

Boy, I must be doing something wrong. I have a half-pint and only evaporate about 5 - 7 gph.

[RileySugarbush]

Harken,

You are the champ at 2x4 flat pans. What is your secret!

Upon further review..... Dill's father in law has you beat.

[Dill]

He had that little rig working hard. Granted yesterday was 50 degrees with little to no wind. And it was all really old construction salvage lumber. And by old it was a minimum of 60 years, and probably hardwood.

[slammer3364]

We have a little 18x48 D@G Hobby evap I usally get 10to 12 gph. If I boil longer I can come close to 15gph. I have a blower and use seasoned oak and dry maple

[sugarin4fun]

I have a homemade 2-1/2x4 with a flat bottom pan and get between 8-12 gph. I really have to keep on it and use good dry wood to get the 10-12 gph evap rate. Next year I hope to add a preheater.

[michigansugarman]

We have a Leader WSE 2x4. The back pan is a 2x2 drop flue pan and the front is a 2x2, 3 channel flat pan. The stack is 10 " diameter and approximately 16' high. We use a blower.

Yesterday we put approx. 150 gal sap through in 7 hours using mixed hardwood that has been dried for several years and split to wrist/forearm size and firing every 10 minutes.

Up until this year we used a 1/2 Pint (the old style with a rounded bottom) and the best I could do was around 5-7 gal/per hour. The 2x4 with a blower is a huge improvement!

[325abn]

I am getting low to mid 20s with my oil fired 2 x 4 rig. Seems I was closer to thirty last year.