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ModuSat® XR is Independently Tested to the New BESA UK Standard for Heat Interface Units



BESA Test Standard for HIUs

HIU performance has a major impact on the overall performance of heat networks, both with respect to return temperatures and network sizing.

Monitoring and trials have revealed that some heat networks have failed to achieve their intended efficiency targets. The new BESA (British Engineering Services Association) UK Standard for Heat Interface Units was launched in late 2016, having been developed by industry experts.

The new standard is regarded as an important step towards improving the overall performance of British district heating schemes and its key objective is to enable the performance of different HIUs to be evaluated within the context of typical UK operating conditions, thereby enabling heat network developers to consider the performance of specific HIUs against design requirements.

Under the test regime, HIU performance is independently tested and verified against a set of tests which replicate “typical” UK operating conditions. The key output of the test is the calculation of the annual Volume Weighted Average Return Temperature (VWART), with this being a composite of estimations of the annual VWARTs for domestic hot water, space heating and keep-warm functions.

Volume Weighted Average Return Temperature (VWART)

The VWART is an estimation of the annual volume weighted average return temperatures for domestic hot water, space heating and keep warm function.

The results reflect the expectedimpact of the HIU in differentoperating modes, mimicking the demands they might expect toexperience across a year in a typical new build development.  

A lower overall VWART represents a lower average annual return temperature from the HIU to the primary network and therefore a better performing HIU.

VWART Efficiency IMAGE

Want to Find Out More?  Book our CPD Seminar – Understanding the BESA Test Standard for HIUs (VWARTS and All)


Full BESA Report

High Temperature Results / Low Temperature Results

For further information about the official test results for the Evinox ModuSat XR download the brochure using the form below

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Heat Interface Units

Our range of ModuSat® eco-efficient heat interface units (HIUs) have been designed to provide apartments and communal housing developments with independent fast recovery hot water and high efficiency heating.

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Communal & District Heating

A communal or district heating system supplies heat to a number of dwellings from a common heat source. It may comprise of, for example, a system heating a block of apartments or a larger scale system heating many buildings.

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Solutions for M&E Consultants

Our products and design principles meet the energy efficiency requirements to support modern heat networks. We work closely with consultants to provide advice and support when selecting equipment, and ensure successful project delivery.

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