Dunkirk Boilers · Series
Dunkirk Boilers DXL (cast iron, non-K)
The DXL page is Dunkirk's legacy non-K cast-iron gas boiler: seven capacities printed from 50 to 200 MBH (50–75–100–125–150–170–200) with the Fuel Smart Hydrostat control, up to 83.5% AFUE, and a page note that the 'DXL with recessed control available while supplies last' as the DXL 3200-PLUS with external control replaces the previous version. The page shows zero current documents.
Series facts
- Type
- non-condensing
- Efficiency
- 83.5% AFUE
- Fuel
- LP conversion kit printed on the product page.
- Venting
- Chimney vent with a factory-installed integral draft diverter (low profile, up to 30" shorter than external draft hood installations).
- Models documented
- 0
- Warranty
- Not verified
'Up to 83.5% AFUE' as printed on the DXL product page, with the Fuel Smart Hydrostat control.
About the DXL (cast iron, non-K)
The DXL page describes a gas-fired hot water boiler with a cast iron heat exchanger and cast iron push nipple connections, an integral draft diverter that lowers the profile by up to 30" compared with external draft hood installations, electronic ignition, a motorized vent damper and the advanced Fuel Smart Hydrostat control (temperature limit with digital display and diagnostics, LWCO and boiler reset). The page prints capacities of 50 – 75 – 100 – 125 – 150 – 170 – 200 MBH and rates the line up to 83.5% AFUE, with a 'Cast to Last' 20-year non-prorated warranty.
Status as printed: the page carries the note 'DXL with recessed control available while supplies last. DXL 3200-PLUS with external control is replacing the previous version' and shows zero current documents (all product documents archived), so Boilers.ca records the DXL (non-K) as a legacy hub with productStatus 'discontinued'. This is distinct from the current DXL-K series on the Hydrolevel w-4200 control, which is documented under the cast-iron hub.
Owners of an installed DXL can still download the archived IOM set from the product page. The ratings are the US-market figures Dunkirk prints; no Canadian listing was verified on the pages checked on September 9, 2026, so canadianStatus stays 'unknown'. Gas work belongs with a licensed contractor.
Highlights
- Legacy non-K cast-iron hub: page live with 0 current documents, checked 2026-09-09
- Seven capacities printed: 50–75–100–125–150–170–200 MBH; up to 83.5% AFUE with Fuel Smart Hydrostat
- Page note (verbatim): 'DXL with recessed control available while supplies last' — the DXL 3200-PLUS with external control replaces the previous version
- Distinct from the current DXL-K series (w-4200 control) documented under the Dunkirk cast-iron hub
Models
DXL (cast iron, non-K) models
One canonical page per model with input, output and efficiency kept separate.
Error codes and alerts
DXL (cast iron, non-K) alerts
No alerts documented for this series yet.
Manuals
Official documents
- DXL IOM Rev. D (240009041) — archived document on the product page · 240009041 Rev. D
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Services for Dunkirk Boilers boilers
Frequently asked questions
Is the DXL still sold by Dunkirk?
The DXL page stays live with zero current documents and prints the note that the 'DXL with recessed control available while supplies last' as the DXL 3200-PLUS with external control replaces the previous version — recorded as legacy (productStatus 'discontinued').
What is the difference between the DXL and the DXL-K?
The DXL-K is the current cast-iron series on the internal Hydrolevel w-4200 control with pull-out burner drawers; the legacy DXL (non-K) page covers the earlier Fuel Smart Hydrostat versions at 50–200 MBH.
Does the DXL produce a boiler fault-code display?
No — the Fuel Smart Hydrostat uses a temperature LED display with diagnostic indicator lights, not a discrete code list, so no error-code pages are published for the line.
Talk to a boiler technician
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
- Dunkirk — DXL product page (0 current documents; 'recessed control available while supplies last') · accessed September 9, 2026
- DXL IOM Rev. D (240009041) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.