Experts please confirm Numbers prior to first cut.

[MattMuir]

Hello all. getting ready to cut into a tank and would love the experts to weigh in on the numbers I got from Feldons. I am building a Reverse Flow from what I was told was a 100 gal tank. Tank is 48" tall, 31" wide , with a circumference of 95". Top and bottom are rounded. Was told by client who was in the business this is a snowman tank.
Feldons said firebox should be 20x20x20, 5"inch stack 20 inches tall and half moon connection 12 inches. my question is the half moon shape 12 wide by 4 deep? and what size opening on the other end? Sorry for the nube questions, just want to cut once. I have seen daveomack nail these numbers and would love some conformation.

So far I have purged with bleach,dawn and water. Itching to get after it with the plasma cutter! I will post pics when I can figure out how.

Thanks, Matt

 

[kmmamm]

Hey Matt, before you start cutting, run your numbers on Dave’s calculator (you will find it on the sticky thread at the top of reverse flow. Feldon’s is a good start, but taken literally, it has some quirks that can cause real frustration down the road. Dave does a petty good job explaining his methodology and his numbers will get you squarely in the park.

 

[MattMuir]

Thanks for the reply. I have tried to use the sticky but may be missing something. It seems like complete Greek to me. Should this calculator look like Feldons? All I see are sq inch calculations? How doe yo calculate a half moon in sq inches :)

Thanks Matt

 

[pete mazz]

Tank calculates to 125g.

https://planetcalc.com/5155/

 

[MattMuir]

Thanks Pete, I am getting 140 with new measurements with that calculator. Its very cool with the rounded ends included. Guess I should not overthink this. Every one of these tells me something different.

 

[MattMuir]

Ok, from what I can see I have a 140 gal tank. I am thinking that a bigger FB of 24x24x24 may be better for a few reasons, especially less cutting on the sheet of metal. from what I see I need 110 sq in throat opening which give me a half moon of 24 width and a height of 6.5. Stack height of 35 with a 5 in diameter. Sound about right from those that have built before?

Thanks

 

[pete mazz]

Need to use inside dimensions . I got closer to 125.

 

[MattMuir]

Thanks pete.