DUNKIRK Helix VX Boilers

Dunkirk Helix VX Boiler Overview

The Dunkirk Helix VX is a gas-fired, wall-hung modulating condensing boiler with an efficiency of 95% AFUE. The Helix VX is an Energy Star 2016 Most Efficient product and is available in five sizes. It has a 5:1 turn down ratio and features a self-cleaning, vertically mounted helical fin tube heat exchanger constructed of 316L/444 stainless steel. The unit offers a variety of venting options and is approved for PVC, CPVC and Polypropylene venting. A top gas pipe connection with built-in drip leg makes installation easier, and the unit’s electrical wiring is easy access with a protective terminal strip. Other features include a control module with text display which manages up to 16 boilers, intermittent direct spark ignition, 30 PSI safety relief valve, boiler drain valve and condensate drain with built-in trap.

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Consumer Reviews of Dunkirk Helix VX


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

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Dunkirk Helix VX Boiler Reviews

"Do not travel from home in winter"

1.0 rating
Very Unsatisfied

Just had boiler installed last year and I travel often so need dependable heat for when I am away. Twice I came back to hear freezing temperatures in my home. Do not buy this boiler and risk major damage to your home when you take a trip during winter months.

D.. Palmisano

Buffalo, NY

Other Helix VX Reviews

Among the few online comments regarding the Helix VX is one on greenbuildingtalk.com from a professional who recommended that a homeowner looking for opinions on boilers for radiant heating look into the Helix VX.

Helix VX Warranty

Product registration is required within 60 days of installation for maximum warranty coverage. The warranty for the Dunkirk Helix VX 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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