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indirect with small footprint but high output?
Joseph_4
Member Posts: 293
I have a customer with an indirect 2nd in 7 years same manufacturer that is leaking. size is 20 in diameter and 58 high and with boiler of 180kbtu output at 90 degree rise to attain 140 starting from 50 degrees, it says it outputs 280 gallons first hour and 241 continuous.. only Tank that i see competes is a turbomax and its 2 inches wider. checked weil mclein, burnham, crown, all either physically much bigger or less performance for same size. He has no room in his boiler room for much bigger than 20 x58. anyone know of a small tank with big kick? Turbomax is twice the price of what he has now.
thanks
Joe
thanks
Joe
0
Comments
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TurboMax 23. Don't forget the mixing valve and T&P.
Pipe if full 1.25" with the correct circulator on priority. Price is relative to need.0 -
Triangle Tube Smart 50. 180* boiler water, 90* rise, 200gph continuous, 240 first hour (based on 150 MBH boiler output). 22" diameter, 57" tall.0
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If you have a 180K actual boiler output and you gave 50 degree incoming wanting 140F?
You could do the math snd size a flat plat heat exchanger. Then add whatever size tank you can find to fit. An external hx indirect👍🏻
sized generously you have a 180 tankless😉
What is the failure? Leaking tanks?
Check if the water quality matches the tank construction
High chloride levels can take out stainless tanks quickly, usually void the warranty alsoBob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
Does he really need that much output though? Just because that's what's in there doesn't mean it's the right size. Seems pretty crazy for anything short of a 4 bay car wash. The S20W series from NTI is a wall hung indirect which is only the size of a carry-on suitcase and puts out 212 GPH continuous or 229 first hour with a 180k output at 140 degrees. Plus they come with a mixing valve.1
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@Joseph_4 Amazing. On this topic. I have never installed or dealt with a turbomax. Just interested on the community's thoughts. In regards to performance, efficiency, longevity..... I just did a tiny bit of research and seems that some claim that they do not perform well with low output boilers. I am speaking from total ignorance. All thoughts are welcome. Thanks.0
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They have some reserve but kind of become a shell and tube hx with a sustained load.0
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I had one instance where the orifice plate at the cold water input scaled almost shut. So water volume dropped to almost nothing. It would barely flow a lav sink!STEAM DOCTOR said:@Joseph_4 Amazing. On this topic. I have never installed or dealt with a turbomax. Just interested on the community's thoughts. In regards to performance, efficiency, longevity..... I just did a tiny bit of research and seems that some claim that they do not perform well with low output boilers. I am speaking from total ignorance. All thoughts are welcome. Thanks.
Keep the boiler SWT as low as possible to get the job done. Their charts show output at various SWT, or trial and error. Lower boiler temperature also gets you higher efficiencies.
Scale precipitation is an issue in any tank, higher temperature= more mineral precip.Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
I just found out that NTI has a 20 gallon, wall-hung indirect. One or two might work for you?
https://ntiboilers.com/product/s20w8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0 -
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