The Helix VLT Boiler by Dunkirk

Helix VLT Boiler by DunkirkThe Dunkirk Helix VLT “Vertical Laser Tube,” condensing boiler features a revolutionary, vertically mounted helical fin tube heat exchanger, made of 316L/444 stainless steel. This self-cleaning design features wide, smooth waterways that help remove hard water deposits and prevent scaling.

The Helix VLT offers more application flexibility with modulating capacities from 50 to 299 MBH and the H2O Series of Stainless Steel Indirect Waters Heaters are a perfect match!

Each Helix VLT boiler produced is subjected to a rigorous set of quality control checks before it leaves our factory. Dunkirk test fires each boiler and checks all of the electrical, plumbing, pressure vessel and combustion set up parameters – fine tuning the product’s performance prior to approving the unit for shipment. We even include the final computer generated results for your professional contractor to reference while completing your installation.

Key Features

  • Up to 95% AFUE

  • Built-in primary/secondary piping

  • Built-in low water cut off

  • 5:1 turn down ratio

  • Approved for PVC, CPVC and polypropylene venting

  • Innovative heat exchanger

  • Low maintenance, self-cleaning

  • Designed in the US, for the US

  • 150 psi MAWP

(617) 775-9272

71 Westech Drive
Tyngsboro, MA  01879


Rich Swatton
Master Plumber MA

Vice President

Stephanie Hoysradt

Monday-Friday, 9:00 am - 5:00 pm

Service Technicians

Bret Chisholm
Journeyman Plumber MA