2x 4

I am toying with the idea of getting back into syrup making with my SIL. It will only be on a very small scale. If I were to set up a 2 x4 DF and oil fire it what would be the firing rate or how many gallons per hour would be good rate.`

With dry wood, split wrist size you should be able to get 15-18 GPH, if you add a preheater, hood and air under fire (AUF) maybe 20-22, and if you also add air over fire (AOF) maybe 25-28 GPH. These are all if you boil at 3/4-1" deep in the pans, if much deeper those numbers won't be achieved.

Then if you build or buy a 100 gph R.O you could process the sap from 200-250 taps.

Maple flats,

I have to disagree with your estimated gph on a 2x4 without flues. With 3/4-1 inch of sap with AUF and preheater and small dry wood we get 11-14 gph firing by a timer. Running it HARD and to its Limits we have been up to 17 gph. It no fun a this point! Im not sure how oil vs. Wood fire is going to effect it.
Ive heard from a lot of people that dont run 2x4 that you can get around 20 gph, but I haven't heard from anyone that does getting that gph.

Fred said oil fire it

I do believe that the "DF" in Fred's 2x4 DF means drop flue. I don't know why he is asking about firing rates when his post says "oil fire". Fred can you enlighten us?

Sorry for the confusing post. DF does mean a drop flue and if I am burning # 2 fuel oil how many gallons per hour would be required for a 2 x 4.

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Originally Posted by Fred Henderson

Sorry for the confusing post. DF does mean a drop flue and if I am burning # 2 fuel oil how many gallons per hour would be required for a 2 x 4.

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well we used carlin 101's and 201's and played with a variety of orifice sizes, on our 2x4 drop flue. I will look at the burner that was on it last and see which orifice Is in it. because I do not remember for sure. but I think was 3.8 gal/hr

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Originally Posted by prairietapper

well we used carlin 101's and 201's and played with a variety of orifice sizes, on our 2x4 drop flue. I will look at the burner that was on it last and see which orifice Is in it. because I do not remember for sure. but I think was 3.8 gal/hr

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If you happen to think of it would you see what the spray angle is and whether it is solid or hollow nozzle.

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Originally Posted by Fred Henderson

If you happen to think of it would you see what the spray angle is and whether it is solid or hollow nozzle.

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Gladly and I am heading up to the shack now