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Miura · Series
The Miura LX Series is the company's low-NOx gas-fired industrial steam boiler — a once-through watertube design that reaches NOx as low as 5 ppm at 3% corrected O2, produces steam in under five minutes from a cold start, and is published in LX 50, 100, 150/200 and 250/300 groups from 1,730 to 10,350 lb/hr.
Series facts
The published LX table prints 85% efficiency for LX 50–200 and 87% for LX 250/300 at standard pressure; high-pressure LX 200–300 rows print 84%–86%.
Miura's official LX page describes the line as 'the high-efficiency, easy-to-use boiler' with 'unique design of the LX' ensuring 'safety, reliability and efficiency', reaching 'NOx regulations as low as 5 ppm NOx at 3% corrected O2'. The page states that 'while standard firetube boilers require hours to heat up, Miura's LX Series boilers produce fast steam in less than 5 minutes from a cold start-up', and that the compact design lets owners 'double your steam capacity in the same space or reduce space requirements by half for new construction'.
The published rating table prints four model groups with standard, low and high-pressure configurations: LX 50 (50 BHP, 1,730 lb/hr, 70–150 PSI, 85%), LX 100 (100 BHP, 3,450 lb/hr, 85%), LX 150/200 (150–200 BHP, 5,180–6,900 lb/hr, 85%; high pressure 200 BHP at 170–270 PSI, 84%) and LX 250/300 (250–300 BHP, 8,630–10,350 lb/hr, 87%; high pressure 170–270 PSI, 86%). Emissions are printed 'as low as 20 PPM NOx' on the LX 50, 'as low as 9 PPM NOx' on LX 100–200, 'as low as 5 PPM NOx' on the standard-pressure LX 250/300 and 'as low as 12 PPM NOx' on the high-pressure LX 250/300.
The Technical Resources page lists the exact build codes for each configuration, including LX-50SG-12, LX-100SG-12, LX-100SGN-12 (9 ppm ultra-low NOx), LX-150SG-07/SGN-07, LX-200SG-07/SGN-07, LX-250SG-C/SGN-16, LX-300SG-C/SGN-16 and LXN-300SG-A (5 ppm ultra-low NOx), plus the LXL low-pressure series (LXL-50SG-07 through LXL-200SGN-12). Miura markets the LX as part of its Multiple Installation (MI) system, where modular units stage on and off with demand and one small unit provides n+1 backup. No official Canadian-sales statement was found.
Highlights
Models
One canonical page per model with input, output and efficiency kept separate.
Miura
The Miura LX 50 is a low-NOx once-through watertube steam boiler rated 50 BHP with 1,730 LB/HR of steam output at 70-150 PSI standard pressure, 85% efficiency and As low as 20 PPM NOx in Miura's published rating table.
Miura
The Miura LX 100 is a low-NOx once-through watertube steam boiler rated 100 BHP with 3,450 LB/HR of steam output at 70-150 PSI standard pressure, 85% efficiency and As low as 9 PPM NOx in Miura's published rating table.
Miura
The Miura LX 150/200 is a low-NOx once-through watertube steam boiler rated 150-200 BHP with 5,180-6,900 LB/HR of steam output at 70-150 PSI standard pressure, 85% efficiency and As low as 9 PPM NOx in Miura's published rating table.
Miura
The Miura LX 250/300 is a low-NOx once-through watertube steam boiler rated 250-300 BHP with 8,630-10,350 LB/HR of steam output at 70-150 PSI standard pressure, 87% efficiency and As low as 5 PPM NOx (standard pressure) in Miura's published rating table.
| Specification | Miura LX 50 | Miura LX 100 | Miura LX 150/200 | Miura LX 250/300 |
|---|---|---|---|---|
| input-min | — | — | — | — |
| input-max | — | — | — | — |
| output-max | — | — | — | — |
| afue | — | — | — | — |
| turndown | — | — | — | — |
| vent-max-3 | — | — | — | — |
| vent-max-2 | — | — | — | — |
| weight | — | — | — | — |
Read the full comparison: Miura LX 50 vs LX 100 →
Read the full comparison: Miura LX 100 vs LX 150/200 →
Error codes and alerts
No alerts documented for this series yet.
Manuals
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 Miura boilers
Miura's published table prints LX 50, LX 100, LX 150/200 and LX 250/300 groups, covering 50 to 300 BHP and 1,730 to 10,350 lb/hr of steam.
The LX page prints emissions 'as low as 5 ppm NOx at 3% corrected O2' for the standard-pressure LX 250/300, with 9 ppm on LX 100–200 and 20 ppm on the LX 50; build codes with the 'SGN' suffix denote the 9 ppm versions.
No. Miura publishes fuel-to-steam efficiencies of 85%–87% for the LX, and the line is documented as a once-through watertube steam boiler rather than a condensing appliance.
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On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.