HEM SL Gas Fired Heat Exchanger Module

The HEM SL range of heat exchanger module is based upon similar technology of our standard NVx range of suspended unit heaters. HEM-SL units have been adapted to suit the needs of OEM’s by the provision of its slot-in casing arrangement. It has been specifically designed with Air Handling Manufactures in mind. It’s low resistance to airflow and ability to have combination units make it flexible for both selection and usage.

  • KW OUTPUT30-180

The heat exchanger assembly has a ten year time related warranty

  • Benefits


    • Customisable configuration
    • Capacity range from 30kW to 180kW
    • Reduced air stratification
    • Replacement unit matching from other suppliers
    • Proven durability and long operational life
    • Only the best high-grade stainless-steel materials
  • Features

    Proven durability & quality design

    The HEM gas-fired heat exchange module benefits from an impressive four pass tubular heat exchanger assembly manufactured from aluminised steel formed, swaged and expanded without recourse to stress-inducing welding. AISI T 409 grade stainless steel option is standard with T316 an additional upgrade option.

  • Features

    Air handling & rooftop applications

    Each Powrmatic HEM unit is custom made with a wide range of kW and size configuration and have been adapted to suit the needs of the OEM and AHU industry by the provision of its slot-in casing arrangement for heating and heat integration within air handling units and rooftops.

  • Features

    External & Plant-room enclosures

    The HEM SL is available for weatherproofed external and internal plant room applications. Fully galvanised steel construction in either self finish or durable epoxy powder coated paint finish to BS 10-A-05 as standard. Other colours are available priced upon application.

  • Features

    Compact design & construction

    The compact design and flexible configuration of Powrmatic HEM SL gas fired heat exchange modules combine to provide designers with efficient and cost-effective solutions for a wide variety of air heating and drying applications including new and re-furbished air handling units and duct heaters.


All of Powrmatic’s documents are available as PDFs. Simply click on the links below to download them.

Installation Manuals and Technical Bulletins are available for Gas Safe registered engineers via our Trade Club here


How to Buy

In order to purchase our products, we only sell directly via Gas Safe Registered installers and distribution partners throughout the UK. Depending on your requirements, simply select the most appropriate option below.

Need product advice?

Contact The Team

Our OEM team can offer product selection and application advice for your project. The team can recommend the best size and type of heater you will require and provide you GA drawings to assist you with your project.

Contact Us

Need a full turnkey solution?

Design & Installation

As manufacturers of OEM equipment, we work in partnership with the UK’s leading AHU specialists in the design, supply, installation and maintenance of air handling systems offering the complete package for your project.

Contact Partner