In the quest for improved energy efficiency and reduced operating...
The Environmental Group Limited
Top Efficiency
99% Efficiency and zero combustion emissions.
Installation & Commission
Consultation, installation, commissioning and servicing your boilers.
National Support
Providing 24/7 maintenance and repair services.
Reliable
Australia's largest certified package boiler company (AS2593, AS3814, AS3788).
Peace of Mind
An ASX-listed company.
Behind every great business there is
Reliable ENERGY
Maxitherm Boilers, established in 1946, has evolved from a specialist in industrial boiler and pressure vessel design to a leader in mini-power plants and solid waste energy recovery solutions. With over 500 successful installations for industrial and municipal applications, Maxitherm combines decades of research and development to deliver cutting-edge combustion technology. The Environmental Group, together with Maxitherm is committed to meeting the energy demands of today and tomorrow, providing efficient, sustainable solutions for a cleaner, greener future.
Supporting our customers in their businesses by providing quality energy that they can rely on.
Our Product Range
1. Maxitherm Firetube Boilers
Our boilers feature a proven reverse flame combustion design, providing an efficient three-pass gas flow system. The large pressurised combustion chamber allows the first two gas passes to occur within the chamber itself. The reversing flame scrubs the gases, ensuring multiple re-entries into the high-temperature zone before the final pass through the smoke tubes. Dimples in the tubes slow gas passage, improving heat transfer efficiency.
This design optimises the balance between radiant and convection heating surfaces for maximum efficiency when using gas or oil. The pressurised combustion system means the boiler operates independently of chimney draught, allowing for reduced chimney sizes and lower installation costs.
The easy-to-clean design allows access to all heating surfaces via the burner door, enabling cleaning while the boiler remains hot and in operation—eliminating downtime and maintaining efficiency. Wet back construction with an insulated firing door ensures maximum heat retention and reduces condensation risks.
Additional features include a demountable casing system, a strengthened and braced top casing that serves as a walkway, and compliance with all relevant Australian standards.
Features
- Wet/Dry Back Construction
- Generous Heating Surface Area
- Front Hinged Door
- Dunphy Burner, Controls, and Valving
- Full Insulation of Heaters
- Complies with Australian Standards
- Standard Instrumentation Fittings
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Firetube Boiler (Liquid/Gas) Model DBS (Dry Back)
Fully automatic self contained for simple and reliable steam generation
This boiler has been specially designed for small boiler installation where simplicity and ease of operation are the primary requisite. This model has all features of the larger boiler and its construction and performance is unequalled by similar capacity boilers. The integrally designed combustion equipment is available for use with all type of gaseous light oil or combination fuels. Require only minimum maintenance and supervision to provide low cost steam. You pay for what you use and no more!
Features
- Three passes economic design.
- High heating surface.
- Conformity with Rules, Standards and Regulations.
- Constructed and factory tested under a total Quality Management System.
- High quality fittings and components.
- Full year warranty provided by qualified after sales service.
- Large shell diameter and water line to dry steam production and large reserve.
Firetube Boiler (Liquid/Gas) Model WBS (Wet Back)
For greater reliability & lower maintenance
The development of the wet back construction by Maxitherm’s Research and Development engineers resulted in a package boiler design which completely eliminates gas sealing or heat loss problems, lower maintenance, simplifies accessibility and makes your plant room cleaner and cooler
The complicated refractory system required by a dry back boiler are eliminated. Access to the gas reversal chamber is simple and fast via a small hinged manway.
The completely water cooled combustion chamber increases the proportion of radiant heating surface, lowering the gas temperature at the entrance to the first convection pass and increases the overall operating efficiency of the Maxitherm boilers. The result lower fuel cost!
Features
- Easier access and lower maintenance cost.
- Three passes economic design.
- High heating surface.
- Lower metal temperature effect lower heat losses and cooler boiler room.
- Eliminate refractories, insulator and baffles
- Increased radiant surface and bigger furnace diameter.
- Conformity with Rules, Standards and Regulations.
- Constructed and factory tested under a total Quality Management System.
- High quality fittings and components.
- Full year warranty provided by qualified after sales service.
Firetube Boiler (Biomass/Solid Fuel) Model EKW
Small capacity firetube boiler from waste wood chips or saw dust
Maxitherm has developed the design of wet back package steam boiler to be able to burn solid fuel. Maxitherm boiler model EKW has large furnace diameter, which could be installed with fix grate or small stoker for low ash fuels.
The wet back construction has many advantages as higher heating surface, lower metal temperature, less refractories, means less maintenance cost.
This boiler model is designed for use with wood chip, briquettes and low ash coals and is fitted with a pneumatic fuel feeding system and fixed high velocity grates.
Features
- Wet back construction.
- Large furnace diameter.
- Three passes design.
- High velocity louvre type grate bars.
- Pneumatic fuel feeding system provides high efficiency combustion.
Firetube Boiler (Biomass/Solid Fuel) Model C / UFM
Underfired multi tubular colonial boilers
The model C underfired multi tubular boiler is one of the traditional design in the Maxitherm range and has been field proven many times over. The simple rugged design is ideal for applications where simplicity of operation an low maintenance are of the paramount importance.
The model C maxitherm design is ideal for application to waste heat recovery.
Maxitherm’s underfired boilers can be equipped for the combustion of all type of fuel or combination of fuels. Conversion from one fuel to another is also possible to meet future fuel price and availability fluctuation.
Features
- One pass design.
- Burn any kind of fuel.
- Conformity with Rules, Standards and Regulations.
- Constructed under a total Quality Management System.
- Top quality welded construction.
- High quality fittings and components.
- Full year warranty provided by qualified after sales service.
2. Maxitherm Watertube Steam Boiler
Maxitherm water tube steam boilers range, from outputs of 1000 kW – 50 M.W. in both saturated and superheated steam delivery. The Maxitherm water tube boilers can utilise most types of Liquid and Gaseous fuels available, including process gas steams and combinations of fuels.
The safe and proven Maxitherm ‘D’ type design configuration delivers outstanding longevity and cost efficiency through the provision of high thermal efficiency, ease of maintenance and incorporation of quality based equipment, instrumentation, controls, and burners in a packaged boiler.
The fully engineered steam boiler package is designed for safe, fully automatic and unattended operation in accord with Australian Standards. The benefit of this is to enable operation without the need for skilled operators attending the boiler plant constantly.
The Maxitherm boiler range uses a ‘D’ type configuration for the arrangement for the steam and water drums and the water tube assemblies.
The overwhelming advantages of the Maxitherm design with it’s fast and positive circulatory system has resulted in being chosen by clients seeking delivery of achieved long term value all over Australia and the World.
Features
- Thermal output for 1 M.W. – 50 M.W
- Steam capacities from 1600 kg/hour – 80,000 kg/hour
- Steam design pressures of 10 – 70 BAR
- Saturated steam or superheated steam options available
- ‘D’ Type configuration
- Finned tube furnace and convection bank water walls providing low maintenance
- Large steam and water drums providing high steam purity, facilitation of fluctuating steam loads and ease of access during
- annual inspections
- Large combustion chamber providing long life and high thermal efficiency
- Large bore water tubes delivering high construction integrity and dependability
- Proven reliability
- Conservative heat transfer rates
- Complete accessibility for maintenance and inspection
- Responsible design and project delivery
Benefits
- Minimises refractory
- Decreases maintenance costs
- Accelerates heat up time
- Reduces thermal stress, ensuring longevity
- Protects the heater against external system defects
- Easy access for maintenance and cleaning
- Increases thermal efficiency.
- Cuts down on radiant losses
- Brings down fuel costs
- Lowers plant room temperature.
- Expedites approval by statutory authorities.
- Improves resistance to external corrosion.
- Eliminates the need for further costly investment.
Model Mini D/D
Model FDB / FDW
Model JDW
Model DLF
Model TDC
Maxitherm Watertube Boiler (Liquid/Gas)
Model Mini D/D
The Mini D is a two drum bent tube water tube boiler of the proven D type, and available from 1 MW to 50 MW. The Mini D is delivered complete factory assembled and tested with maximum safety, combustion controls, flame failure safeguards, dual water feeding equipment and water level control.
The Maxitherm design has a water-walled combustion chamber and a water-cooled convection bank casing of seal welded fin-tubes, together with a gas-tight outer casing suitable for either indoor or outdoor installation.
The unit is design to operate under a forced draft so that stack requirements can be eliminated to the needs of the local authorities.
Features
- Two or three passes design
- Two drums D type configuration for simplicity
- One size of tubes for ease maintenance and stock
- Finned tubes water walls
- Less refractories means lower maintenance cost
- Large steam and water drums for steam purity and good access
- Unheated downcomers for positive circulation
- Complete factory assembled and tested
Maxitherm Watertube Boilers (Biomass/Solid Fuel)
Model FDB/FDW
Energy from briquette combustion
Maxitherm model a FD watertube boiler is developed from the world wide proven D type construction to burn solid fuel as brown coal wood or agricultural waste fired.
Maxitherm boiler model FD is equipped with pneumatic fuel feeder and the combustion chamber shall operate under balanced draught to give maximum and high efficiency combustion. A fixed pinhole grate shall be fixed on the floor of watertubes. The water-cooled grate shall be suitable for low ash industrial brown coal briquette combustion.
Features
- Proven two drums D type configuration for simplicity
- Two pass design for ease maintenance
- Finned tubes water walls for low maintenance
- Large steam and water drums for steam purity and good access.
- Large combustion chamber for long life and high efficiency
- Large bore tubes for ruggedness and dependability
Maxitherm Watertube Boilers (Biomass/Solid Fuel) Model JDW
Energy from almost any fuel
One result of the global fuel prices increase has been the emergence of waste fuelled energy system for many process applications. The Maxitherm Multi-D can be fitted with combustion systems to suit almost any fuel.
High moisture fuel such as green sawdust, bark and woodchip can be utilised on the inclined water cooled grate, or a dumping grate where ash greater than 6% is present.
Pneumatic or mechanical spreader feeders, drum feeders, manual feeding as well as stepped grates can be utilized depending on fuel quality, sizing, etc.
Features
- Proven two drums D type configuration for simplicity.
- Finned tubes water walls for low maintenance.
- Large steam and water drums for steam purity and good access.
- Large combustion chamber for long life and high efficiency.
- Large bore tubes for ruggedness and dependability.
Maxitherm Watertube Boiler (Biomass/Solid Fuel)
Model DLF
Energy from agricultural waste
The Maxitherm BOILER MODEL DLF can be fitted with combustion systems to suit almost any fuel. High moisture fuel such as palm fibre or rice husk, can be utilized on the fixed inclined water-cooled grate.
Pneumatic spreader feeders can be utilized depending on fuel quality, sizing, etc.
Features
- Proven two drums D type configuration for simplicity.
- Finned tubes water walls for low maintenance.
- Large steam and water drums for steam purity and good access.
- Large combustion chamber for long life and high efficiency.
Maxitherm Watertube Boilers (Biomass/Solid Fuel) Model TDC
Energy from natural resources
Maxitherm coal fired boiler model TDC is operating with a wide range of fuels from the high volatile low ash coal in New Zealand to the high ash low volatile coals indigenous in China or Tasmania.
The Louvre traveling grate stoker manufactured by Maxitherm is capable to handling effectively, coals of all types, even in those with a high percentage of fines.
Features
- Proven two drums D type configuration for simplicity.
- Finned tubes water walls for low maintenance.
- Large steam and water drums for steam purity and good access.
- Large combustion chamber for long life and high efficiency.
- Large bore tubes for ruggedness and dependability.
3. Maxitherm Water Heaters
Maxitherm Water Heater (Liquid/Gas)
Model HWB (non pressurize)
Package storage water heater with build in calorifier for simple installation
The unique two-pass design employs a large capacity water heater of wetback design that can be fitted with an all copper calorifier for the delivery of consumable hot water. A wide range of calorifier sizes is available up to 100% of the heater capacity.
The Maxitherm hot water heater model HWB is ideal for a variety of industrial and commercial applications such as process heating, commercial building conditioning, amenity blocks, hotels, motels, or any application requiring a combination of heat load and consumption hot water requirements.
Consumption hot water is obtainable from the calorifier at a temperature of 60 deg C and at water pressure up to 150 psi. Supply of closed system hot water is available up to 98 deg C and at a normal maximum pressure head of 30 psi or 21.4 m static head.
Features
- Easier access and lower maintenance cost.
- Two passes economic design.
- Built in a corrosion free calorifier fitted internally.
- Increased radiant surface and bigger furnace.
- Wet back construction for long life operations.
- Large shell diameter to provide bigger hot water storage.
- Conformity with rules, Standards and Regulations.
Maxitherm Water Heater (Liquid/Gas)
Model H (perssurize)
Packaged high temperature water heaters
Maxitherm model H package high temperature water heater is designed for use in closed-water system such as in the air conditioning of the large buildings and industrial process heating with hot water.
This model is horizontal firetube water heater of wetback construction with hinged cover for easy access, and comes equipped for the combustion of any type or grade of light oil or gas. Units are designed for pressure heads equivalent to 1000 kPa.g or water temperature up to 180 deg C.
Features
- Easier access and lower maintenance cost.
- Two passes economic design.
- Increased radiant surface and bigger furnace.
- Wet back construction for long life operations.
- Lower metal temperature effect lower heat loss and cooler boiler room.
- Large shell diameter to provide bigger hot water storage.
- Conformity with rules, Standards and Regulations.
- Constructed and factory tested under a total quality Management System.
- Full year warranty provide with qualified after sales services.
Applications Across Diverse Industries
Process Manufacturing
Commercial & Industrial Facilities
Education
Military Bases & Government Facilities
Healthcare
Pharmaceutical Processing & Biotech
Agriculture
Utilities
Food & Beverage Processing
A century of service experience
Working with our customers to ensure highest combustion efficiency.
Our qualified and experienced service technicians ensuring safety, efficiency and reliability for all your installation and maintenance needs.
24/7 Services
- Emergency Gas Appliance repair, installation & service
- Boiler, Gas Burner Maintenance & Repair
- Boiler and burner breakdown service
- Emergency boiler repair
Gas
- Valve Repair Off-Site-Repair
- Gas burner repair, maintenance & upgrades
- Combustion efficiency analysis
- Installations/Commissioning
- Conversion of LGP & Natural Gas
Services Contracts
- Maintenance contracts
- Tailor-made service concepts
- Project management team
- Comprehensive engineering solutions
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