Heat Interface Units

Altecnic manufactures a diverse range of ‘intelligent’ heat interface units (HIUs) that offer a number of features and functions. Designed with all stakeholders in mind from specifiers, installers and landlords, right up to the end-user. 

  • Industry Expertise

    Our Specification Team is home to a number of the industries most experienced minds.

  • SmartSat

    Altecnic SmartSat electronic heat interface units (HIU) are the UK's most efficient HIU offering a number of market-leading features including floor drying setting, integral pre-payment and digital commissioning.

  • Drive to Decarbonise

    The Altecnic Heat Network range provides a reliable and efficient way of producing hot water.

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6 products found

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  1. SATK32 INDIRECT HEAT INTERFACE UNIT WITH NETWORK PROTECTION AND INTEGRAL ROOM CONTROLLER

    The SATK32 heat interface unit with advanced electronic functions is the latest ‘intelligent’ range of HIU from Altecnic. It is also the complete solution for instantaneous hot water production and space heating control.

    ● Electronic control
    ● Up to 15kW heating output
    ● Primary return temperature limitation
    ● Primary flow rate limitation
    ● User configurable preheat
    ● Modbus output
    ● Full clamshell insulation
    ● 600 kPa differential pressure capability
    ● Pump anti-clog feature

  2. SATK22 DIRECT

    The SATK22 heat interface unit with advanced electronic functions is the latest ‘intelligent’ range of HIU from Altecnic, with models available for low, medium and high-temperature systems.

    The SATK22 HIU allows independent control of heat regulation and domestic hot water production within centralised heating systems or systems served by district heating networks. This heat interface unit features exceptional flexibility of installation and remote controllable smart electronic functions, designed to enhance efficiency of the system.

    Find technical details on each model in the table below. Alternatively, download the Data Sheet and Installation, Operation & Maintenance Instructions under the Technical Downloads section. 

  3. SATK30 INDIRECT HEAT INTERFACE UNIT

    The SATK30 heat interface unit is the latest ‘intelligent’ range of HIU from Altecnic, offering the complete solution for instantaneous hot water production and space heating control.

    The twin plate design hydraulically separates both domestic and space heating from the central primary supply, while the internal electronic control unit ensures maximum efficiency and
    control. 

    Specifications:

    • Electronic control
    • Up to 50 or 75kW DHW output
    • Up to 15 kW heating output
    • Radiator or UFH temperatures

    Find the full list of technical specifications for this heat interface unit in the data sheet linked under Technical Downloads below, as well as Installation, Operation & Maintenance instructions

  4. SATK102

    ● Wall-mounted
    ● Electronic control
    ● Up to 40 / 70 / 80 kW DHW output
    ● Optional primary support pump
    ● 2-way primary modulating valve
    ● Settable DHW temperature
    ● Includes cover
    ● Can be grouped for higher DHW outputs, using the cascade controller
    ● Dimensions (H x W x D) 330 x 420 x 235mm

  5. SATK40 INDIRECT

    ● Electronically controlled heat interface unit
    ● Indirect heating, up to 15kW
    ● Suitable for connection to an indirect hot water cylinder
    ● Up to 50kW DHW capacity (configurable

  6. SATK20 DIRECT

    ● Electronic control
    ● Up to 50 kW DHW output
    ● Up to 15 kW heating output
    ● Modulating or fixed heating flow temperatures
    ● Suitable for UFH without additional mixing circuit (SATK20103)
    ● Low, medium and high temperature models available
    ● Includes pump bypass in case of complete TRV shutdown
    ● Optional heating pump
    ● Lockable, insulated cover with meter window. Metal, powder coated insulated cover also available
    ● Stainless steel pipework
    ● Integral heating circuit DPCV
    ● Dimensions (H x W x D) 550 x 450 x 265mm

6 products found

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About our Heat Interface Units

Altecnic SmartSat electronic heat interface units (HIU) are the UK's most efficient HIU offering a number of market-leading features including floor drying setting, integral pre-payment and digital commissioning. Altecnic is a preferred HIU supplier to the charitable housing association L&Q which currently houses around 250,000 people in more than 95,000 homes.

HIU FAQs

What is a heat network?

A heat network, sometimes referred to as district heating, is a system that uses a centralised heat source (usually located in a plant/mechanical/boiler room) to distribute hot water through a network of insulated pipes. This system is generally used to fulfil heating and hot water requirements in residential buildings such as apartment complexes but is also used in educational and commercial buildings. HIUs are used to transfer heat from this centralised source to each individual dwelling.

What is an HIU?

Heat Interface Units (HIUs) are similar in appearance to a standard boiler and are typically used in the heat networks explained above. They act as a bridge between the central boiler and the hot water outlets in each apartment such as radiators, showers, kitchen taps, etc. This removes the need to install individual boilers in each dwelling, creating both money-saving and energy-saving opportunities amongst many other benefits.

How does an HIU work?

HIUs are installed into each property in the building as a boiler would be. The unit is connected to one central boiler through a network of pipes. HIUs like the ones manufactured by Altecnic incorporate one or two-plate heat exchangers to transfer the heat from the central system into instantaneous heating and hot water as and when it is required.

Altecnic HIUs incorporate an internal electronic control unit that ensures maximum efficiency, improved reaction time and control, but also incorporates other additional features. Modulating valves control the supply of hot water to both the space heating and domestic hot water within the apartment. The thermally insulated casings also minimise heat loss from the unit.

Benefits of using Heat Interface Units

When compared to traditional individual heating systems, HIUs present greater benefits to both landlords and tenants. When used with centralised heating systems, heat interface units can have the following advantages:

Minimised installation and maintenance

As maintenance and repair are focussed on the central plant room opposed to individual boilers in each dwelling, long-term cost savings can be achieved.

Installing boilers in each property would be costly, labour-intensive and time-consuming. Installing heat interface units is much more cost-effective.

Maintenance of an HIU is more straightforward compared to a gas boiler, with all components located inside the box for the engineer.

Compliance with low-carbon and renewable energy requirements

Although central gas boilers are used, heat networks also present a great opportunity to use renewable energy sources such as CHP, biomass, solar or heat pumps.

As the system delivers hot water on demand, no energy is wasted from heat building up or dissipation after use.

*Maximum energy savings from the HIUs can only be achieved if the system is designed, installed, and commissioned correctly, and HIUs are selected and sized correctly.

Space-saving

HIUs take up much less space than a boiler, meaning available floorspace is optimised in each property.

Benefits for the consumer

HIUs are very responsive, providing instant supply on-demand.

Energy bills should be decreased as communal heating is all about improving energy efficiency, CO2 reduction and saving on running costs.

Eliminating the gas supply alleviates any worries about carbon monoxide emissions.

Occupants have good visibility of energy consumption which promotes energy saving.

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