The YGHP Heat Interface Units ( HIU ) offer stable high performance at an affordable price.

YGHP HIU’s offer the very best in terms performance, longevity and price. The YGHP HIU offering is the ultimate package for designer, installer and consumer.

A standard 5 year warranty which is extended to 7 when YGHP commission. When tested to the UK HIU regime it was found to be best in class for DHW response times along with a very impressive 29 VWART. However when individually tested to site specific requirements an indirect model delivered even greater results.

HIU’s from YGHP are the efficient high performing range in the UK with over 150,000 supplied and working throughout Europe.

  • BESA tested model available with an impressive 29 vwart and quickest DHW response time of any HIU.

  • WRAS approved components.

  • Dual differential pressure control valve that offers stable and continuous supply of heating and hot water.

  • Latest SWEP plate heat exchanger offering exceptional performance.

  • Water arrestor to avoid noise, vibration and water hammer in the system.

  • EPP thermal casing to ensure minimum heat losses and maximum heat efficiency.

  • DHW thermostatic control valves offer the most accurate and effective temperature control. The sensor is within the PHE, making this an instant response product. The thermostatic valves are optimised for minimal idle consumption.

  • Heating thermostatic control valves ensures an accurate temperature across all heating circuits or underfloor heating manifolds.

YGHP HIU Data Sheet

The YGHP Heating Interface Unit ( HIU ) product family is designed to satisfy a range of consumer demands in terms of direct, bespoke or indirect heating and domestic hot water (DHW).

Our BESA approved specific HIU model provides complete solutions for apartments and houses to make radiator heating or underfloor heating and instantaneous DHW preparation with  thermostatic control.

The Indirect HIU is specifically designed for either radiator or floor heating and instantaneous DHW preparation with thermostatic control. It has all the necessary components  (e.g. valves, heat exchangers (DHW heat exchanger and heating circuit heat exchanger), pump, expansion vessel, pipes, fitting and connections) to deliver convenient and efficient DHW and heating.

Optional components such as the re-circulation component enables the HIU to deliver instantaneous DHW, the hot water priority component switches the HIU to prioritizing the DHW supply, and the thermostatic actuator enables the HIU floor to open or close the heating circuit remotely.

The Indirect HIU has 3 types based on the number of plates of its DHW heat exchanger: 30, 40, or 70 plates. To connect the Indirect HIU with the piping system of apartments or houses, mounting plates with 8 ball valve isolations are used. The flushing by-pass component enables flushing and venting the system before commissioning. The HIU is covered with high quality EPP Covers.

The YGHP HIU is comprised of 14 main components. These components are secured on a galvanized steel plate.

Each HIU has a DHW brazed plate heat exchanger (fully insulated), thermostatic control valve, differential pressure control valve, heating component, air vent,
water hammer, spacer for heat meter. The 18 mm diameter pipes of the HIU are made from AIS 316L stainless steel.

Modern construction is being driven by energy efficiency, energy billing and comfort. The YGHP HIU is the perfect solution.

Thermostatic Control Valve

The DHW thermostatic control valve (Figure below) is a simple yet reliable device for accurate temperature control that works without power supply and active control. These valves can ensure virtually constant temperatures. The thermostatic control valves are optimized for minimal idle consumption.

Brazed Plate Heat Exchanger

Each HIU is equipped with a DHW brazed plate heat exchanger (Figure below) to transfer heat from the heating supply to the HIU for DHW preparation. In the YGHP HIU the DHW heat exchanger has optimized asymmetric plate geometries that combine extraordinary thermal efficiency with a low pressure drop and low return temperatures.

Differential Pressure Control Valve

Each YGHP Indirect HIU is equipped with a differential pressure control valve (Figure below) which balances the system to react to pressure variations in variable flow systems. In hydronic heating systems with a HIU, the differential pressure control valve prevents high pressure difference on the HIU by providing the necessary conditions to achieve the desired flow distribution in the system. The differential pressure control valve balances all components of the HIU system. In the HIU, differential pressure control valve with size of DN20, Kvs of 2.5 m3/h, ∆P Setting Range of 20-65 kPa, and Nominal Pipe Size of ¾” is used.

Combined Temperature & Pressure Gauge.

The combined thermometer/pressure gauge (Figure below) enables the operator to observe the heating circuit temperature and system pressure in a single gauge at a single measuring point. It has a bimetal measuring system for temperature measurement and a bourdon tube measuring system for simultaneous pressure measurement. Both values are measured and displayed by a single gauge. A self-closing mounting valve enables the gauge to be replaced without the need to drain the system.

Expansion Vessel

The HIU is equipped with an expansion vessel (Figure below) to maintain constant pressure in the heating circuit. The expansion vessel is made from rubber diaphragm fixed membrane and according to the standards established by PED 2014/68/UE and DIN EN 13831 regulations.

First Fix , Isolation Ball Valve Kit & Flushing By-Pass

To connect the HIU and the piping system of apartment, mounting plates are used. These plates have 8 ball valves and a flushing by-pass.

Each secured on a galvanized steel plate, ball valves are connected with G ¾” male thread connections.

Flushing by-pass enables the flushing and venting of the system before commissioning the HIU.

Optional pre-pay valve

Prevents use of the HIU using a normally closed actuator. End users must be pre-pay for energy use before the actuator will allow flow from the primary circuit to pass to the unit.