Slant/Fin | High Efficiency Boilers and Baseboard

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Fin Tube / Bare Elements

Fin Tube / Bare Elements


  • Lengths: Precut standard lengths
  • S and C Series: 2' - 12' (C-340 is 2'-10')
  • E and H Series: 2' - 8'
  • Finish: Copper/Aluminum or Steel - natural finish

Instead of light-wall tubing, Slant/Fin uses only copper seamless-drawn tubing or Schedule 40 steel pipe. Many fin's have a tongue-and-groove collar which interlocks with the next fin for accurate and uniform spacing and prevents fins from twisting loose. Custom configurations available. For use in space heating and industrial heating applications.

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Product Features

  • Interlocking fins and tight fit to element creates high heat transfer
  • Plastic expansion cradles eliminate expansion  noise
  • 12 types of fin-tube which may be used with the various Slant/Fin enclosures
  • S-532 -1.25” steel pipe, 4.25 steel fin, 32 fins per ft
  • S-540 -1.25” steel pipe, 4.25 steel fin, 40 fins per ft
  • S-832 -2” steel pipe, 4.25 steel fin, 32 fins per ft
  • C-340 -.75” copper pipe, 4.25 alum. fin, 40 fins per ft
  • C-440 -1” copper pipe, 4.25 alum. fin, 40 fins per ft
  • C-540 -1.25” copper pipe, 4.25 alum. fin, 40 fins per ft
  • H-1-.75”copper pipe.  3”x 3.25” alum. Fin, 48 fins per ft
  • H-3-.75”copper pipe.  2.75”x 2.5” alum. Fin, 55 fins per ft
  • H-4-1”copper pipe.  3”x 2.5” alum. Fin, 48 fins per ft
  • H-5-1.25”copper pipe.  3”x 3.25” alum. Fin, 48 fins per ft
  • H-6-1.25”steel pipe.  3”x 3.25” alum. Steel Fin, 48 fins per ft
  • E-75-.75”copper pipe.  2.63”x 2.13” alum. Fin, 55 fins per ft

How It Works

Full wall thickness and strength of copper tubing and IPS steel pipe are maintained by forcing tubing through undersized fin holes under high hydraulic pressure. A force-fit mechanical bond is attained which maintains maximum heat transfer indefinitely. Compact models (E-75, H-3 and H-4) feature double bent aluminum fins, providing extra heating surface in a slimmer profile. Edges of each fin are wedged against the next. Fins reinforce each other - won’t be crushed, bent or twisted. End fins are of plated steel for extra ruggedness. Expanded copper tubing ends eliminate couplings, reduce soldering. Steel elements are factory threaded at both ends.

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