La certificazione parte terza

Scope of the programme

The present certification scheme covers Heat Interface Units, defined as a packaged unit including at least one Domestic Hot Water heat exchanger and control elements.

The HIU may contain:

• An additional heat exchanger for heating
• Balancing elements
• 1 heating pump
• Metering possibilities

The HIU covered by the scheme are 3 pipes configurations. HIU with DHW capacity level above 70 kW are not covered by the certification scope. Only units for single family dwellings use are covered.

The covered technologies are:

• Domestic Hot Water technology only: HIU/DHW

• DHW and direct heating technology: HIU/DHW/DH 

• DHW and direct heating mixed technology: HIU/DHW/DHM

• DHW and indirect heating application: HIU/DHW/IH 

Symbol	Signification
	Pump
	Heat Exchanger
	Mixing valve

Definitions

Heat Interface Unit

Packaged unit including one or more heat exchangers, control elements transferring heat from a primary to a secondary system. The primary system may be a district or communal heating scheme. The secondary system is the space heating or domestic hot water system within the dwelling of other space.

Direct Heating

Primary system and secondary system for space heating are directly connected through the HIU without any heat exchanger. Primary and secondary system are supplied with the same water and pressure. Space heating temperature flow isn’t controlled by mixing loop.

Direct Heating Mixed

Primary system and secondary system for space heating are directly connected through the HIU without any heat exchanger. Primary and secondary system are supplied with the same water and pressure. Space heating temperature flow is controlled by a mixing loop.

Indirect Heating

Primary system and secondary system for space heating are indirectly connected through the HIU with a heat exchanger separating both systems. Primary and secondary system are not supplied with the same water and pressure.

Certified performances

The following performance data declared by the applicant/participant are verified by tests: