DUNKIRK Helix VLT Boilers

Dunkirk Helix VLT Boiler Overview

The Dunkirk Helix VLT is a wall-hung modulating condensing gas boiler with an efficiency of 95% AFUE. The Helix VLT is an Energy Star Most Efficient 2016 product and is available in six models with capacities ranging from 50,000 to 299,0000 BTU/hr. The unit’s heat exchanger is constructed of 316L/444 stainless steel and has a vertically mounted helical fin tube design which helps remove water deposits and prevents scaling. The unit features built-in primary and secondary pipe, and a boiler control module which can stage fire up to 16 boilers. It has a factory-installed low water cut off with test feature and a user display interface with text display which allows easy programming.

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Consumer Reviews of Dunkirk Helix VLT


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #3 of 6 Dunkirk Boiler
  • 0% of customers recommended

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Dunkirk Helix VLT Boiler Reviews

"Not happy"

1.0 rating
Very Unsatisfied

We purchased the Dunkirk vlt in January 2014. The efficiency and money savings was great, but it didn't offset the later breakdown and inadequate warranty. 1.5 years later, the valve at the top leaked and the boiler filled with water. This happened at one of the coldest part of early 2016. I called the company, and guess what – not warrantied! The HVAC folks who installed fixed it but said we needed a new part. When they finally received the part, they installed it and told us that it will need this part and/or a tune up probably every year or two! Several hundred dollars a year in maintenance? Ridiculous!! The inside is still all rusty.

Colette M

St. Clair Shores, MI

"Unsatisfied with company and equipment"

1.0 rating
Very Unsatisfied

Bought this boiler system in 2013 in use for 3 winters had 3 electronic components fail and they claim it is not under warranty. Now I have a bill for $2000.00 to fix this system​. I have Never been this unsatisfied with any company I have ever used. No one should use this boiler because Dunkirk does not back their product.

Paul Sharkey

Manahawkin, NJ

Other Helix VLT Reviews

A homeowner on terrylove.com whose contractor suggested that he install a Helix VLT was told by a professional on the site that the VLT is not a convenient as an HTP unit because it isn’t a combi boiler. A homeowner on finehomebuilding.com asked for help choosing between 5 boilers, including the Helix VLT. He ended up going with a Weil McLain.

Helix VLT Warranty

Product registration is required within 60 days of installation for maximum warranty coverage. The warranty for the Dunkirk Helix VLT boiler is comprised of the following:

  • 15-year heat exchanger warranty, pro-rated after the 10th year
  • 2-year parts and labor warranty

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