SZL Series

Ten Key Reasons Why You Should Choose A SZL Series Boiler. 

Superior design:

Our SZL series boilers offer innovative design, maximising efficiency. These boilers incorporate a large combustion chamber, giving flexibility to burn various coals. A refractory lining allows for the combustion chamber to heat soak providing ample reflective heat and heat reserve to dry incoming fuel, providing good stable combustion. Specialised chain grate stokers allow air to be distributed where it is required to ensure complete combustion of the fuel without high excess air. A heavy and robust grate design provides a reliable grate with low maintenance costs.

Quality manufacturing process:

The SZL range of boilers are designed and manufactured to an accepted standard in New Zealand under an ISO9000 quality management system. In addition, third party inspection by a Department of Labour approved body, is also carried out to independently verify quality during the manufacturing process.

Extraordinary performance:

Energy Plant Solutions' SZL series Steam and Hot Water boilers provide efficiency of >75% gross efficiency to minimise your fuel consumption. A large combustion space with increased surface area provides superior energy transfer from the combustion gas into the water. A long steam drum running the length of the boiler provides additional water volume and steam space, providing stable control even under high loads.

Superior insulation:

The superior insulation system on the SZL series boilers comprises a multilayer of fire bricks, refractory and ceramic fibre insulation, encapsulated in a steel casing, providing excellent containment of heat with very little radiant heat losses.


Each model of boiler is designed to incorporate a large steam space and steam scrubber, providing high quality steam even under varying loads. This high quality steam eliminates unnecessary condensate in the steam, ensuring superior heat exchange in the process equipment, reducing overall fuel consumption and scaling.

Easy maintenance:

A number of combustion chamber access points are installed, allowing easy access to the boiler for maintenance, inspection and cleaning. Steam drum, water drum and bottom headers are also fitted with manways and hand holes, allowing for servicing and inspection.

Environmentally friendly:

Optimal boiler efficiency and precise control provides superior boiler performance over our competitors' products, reducing the amount of fuel required to achieve the same boiler output. Flue gas economisers are available to further enhance the performance of our boilers, reducing fuel consumption, operating costs and CO2 emissions even more.

High quality ancillaries:

EPS use high quality European equipment on our package boilers. These include Spirax Sarco valving and control equipment, and multistage feedwater pumps. The quality of this equipment ensures superior control and ongoing reliability.

Advanced control system:

Our market leading PLC based solid fuel boiler control system provides excellent overall boiler control. Spirax Sarco equipment is utilised for low water level protection and TDS blow down control. A flue gas analysing probe mounted in the boiler's exhaust ducting constantly monitors the flue gas and adjusts the air fuel ratio to ensure precise combustion control. Variable frequency drives are used on all the fans and feed pumps to ensure accurate control maximising boiler efficiency and minimising electrical consumption. A full SCADA (Supervisory Control and Data Acquisition) provides an animated operator interface to indicate current boiler control status, boiler fault descriptions, trending and testing functions. A cellular modem provides the ability to contact responsible persons assigned to the boiler via cell phone or pager, with a description of the actual fault should it occur.

Premium service:

The quality of our installations is second to none. Commissioning is carried out to a high standard with an emphasis on precise control and superior efficiency. Boiler training is provided to ensure those responsible for the ongoing supervision of the boiler are trained to protect your investment and ensure it is operated safely and efficiently. EPS follow this up with market leading after sales technical and service support to our customers.