Gasmaster
Industries Ltd.
Canadian-designed and manufactured condensing boilers and water heaters since 1995. Patented technology achieving up to 99.8% efficiency across 25+ models from 100,000 to 12,000,000 BTU/hr.
GMI Series — Industrial Condensing Boilers
Gasmaster’s internationally patented and design award-winning flagship line. GMI boilers set the world record for the first 4M, 8M, and 12M BTU/hr condensing boilers. Available with dual fuel, dual gas, and biogas options.
The world’s first 4M, 8M, and 12M BTU/hr condensing boilers. The GMI 12M can heat up to 34,200 gallons per hour, making it ideal for large industrial and district heating applications.
- 12M BTU/hr flagship — 3,517 kW / 358.5 bhp
- Up to 99.8% thermal efficiency
- 316L stainless steel heat exchanger
- 20:1 turndown ratio (GMI Mesh burner)
- Natural Gas / LPG / Dual Fuel / Biogas
- SCAQMD Listed — CSA / UL 1738 / ULC S636
Award-winning hot water boilers scaled for commercial and mid-size industrial facilities. Compact footprint simplifies retrofit installations without removing existing equipment.
- Models: GMI 800/800L, 1M/1ML, 1.5M/1.5ML, 2M
- Up to 99.8% efficiency
- 316L stainless steel — thermal shock proof
- Variable speed modulation — minimized cycling
- Low NOx as low as 15 ppm
- LEED credits available
Specially configured GMI units for dual fuel (Natural Gas / Oil #2), dual gas (LPG / Natural Gas), or biogas operation — ideal for remote, industrial, and sustainability-focused projects.
- GMI 1M DF, 4M DF, 8M DF — Dual Fuel
- GMI 4M DG, 8M DG — Dual Gas (LPG/NG)
- Biogas-capable configurations available
- Burner options: Riello, Oilon, Industrial Combustion, Powerflame
- Siemens LMV37 / Honeywell Sola / Autoflame MK8 controls
- Suitable for oil & gas, remote sites, green energy
NX Series — Compact Vertical Boilers
Released in 2014, the NX series delivers high efficiency in a vertical footprint that fits through standard 36″ doorways. Color touchscreen controls and low CO operation make it ideal for institutional and commercial installs.
The core NX lineup with a small footprint designed to fit through standard doorways. Touchscreen color display with intuitive controls makes commissioning and monitoring straightforward.
- Fits through 36″ doorways — minimal disruption
- Up to 99.8% efficiency
- Color touchscreen display
- Low NOx, Low CO operation
- 316L stainless steel heat exchanger
- Natural Gas / LPG / Dual Fuel / Biogas options
High-capacity NX models for larger commercial and institutional heating plants where vertical installation space is limited but output requirements are demanding.
- Up to 4M BTU/hr in a vertical package
- Up to 99.8% efficiency
- Autoflame Mini MK9 control option
- 20:1 turndown ratio (GMI Mesh burner)
- SCAQMD Listed — CSA / UL certified
- 10-year heat exchanger warranty
HC Series — Stackable Condensing Boilers
Originally released in 2016 and redesigned in 2023 with an internal burner, the HC series offers a smaller footprint with stackable configuration — maximizing output per square foot in tight mechanical rooms.
Compact and stackable, the HC 600–1500 are ideal for retrofit projects with limited mechanical room space. Stackable design multiplies capacity without expanding footprint.
- Smallest HC footprint — stackable configuration
- Up to 99.8% efficiency
- 316L stainless steel heat exchanger
- Choice of burners for flexibility
- Natural Gas / LPG / Dual Fuel / Biogas options
- LEED credits eligible
Higher-output HC models for commercial and industrial applications. The 2023 redesign introduced an internal burner, expanding suitability for demanding industrial heating applications.
- HC 2000, HC 2500, HC 3000 models
- Internal burner (2023 redesign)
- Up to 99.8% efficiency
- Siemens LMV37 / Autoflame MK8 control options
- Low greenhouse gas emissions
- CSA Design Certified — UL 1738 / ULC S636
Mobile Units & Rental Solutions
Fully self-contained mobile boiler plants built to your exact specifications — available for purchase or short-term rental. Tested to multiple industrial standards before delivery.
Custom-designed mobile boiler plants for oil & gas, mining, temporary events, and remote applications. Standard containers or custom chassis — built to your project specs, stamped to 10 industrial standards.
- Up to 3 fully modulating condensing boilers per unit
- 12M BTU/hr fits in a standard 20ft container
- Air ride insulated steel chassis
- LED lighting, smoke/gas/CO detectors
- Remote monitoring capability
- Propane-fired generator — suitable for cold climates
Cost-effective rental and leasing options for planned shutdowns, emergency replacements, seasonal demand, or projects that require temporary heating capacity without capital investment.
- Indoor and outdoor units available
- 2M–16M BTU/hr rental fleet
- Custom configurations available
- Complete with trim and accessories
- Rapid deployment for emergency scenarios
- Expert support and training included
99.8% Peak Efficiency
Certified efficiency range of 92–99.8% (ANSI Z21.13b). Average 95.6% — 15–30% higher than conventional boilers — with significant fuel bill reductions.
316L Stainless Steel Construction
ASME-approved 316L stainless steel throughout the heat exchanger and boiler housing — thermally shock-proof, corrosion-resistant, and built to outlast conventional cast iron or copper units.
Low NOx — As Low as 4 ppm
NOx emissions as low as 4 ppm — far below California’s 30 ppm standard. SCAQMD listed. Every Gasmaster unit qualifies for LEED credits on eligible projects.
20:1 Turndown Ratio
GMI Mesh burner offers 20:1 modulation — nearly infinite capacity throttling that reduces on/off cycles by over 90%, extending equipment life and cutting fuel use at part-load.
No Return Water Temperature Limits
Gasmaster’s patented counter-flow heat exchanger design eliminates condensation damage at low firing rates — allowing any return water temperature without risk to the boiler.
World Firsts & Warranty
World’s first 4M, 8M, and 12M BTU/hr condensing boilers. Backed by a 10-year prorated heat exchanger warranty and a 20-year thermal shock warranty on all units.
Request a Gasmaster Quote
From commercial retrofit to custom mobile plants — Gasmaster’s team provides sizing support, energy savings estimates, and expert guidance for your next project.