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NF414 - Nf heat pumps
Certification manual
Certification Manual NF
Documents
Certification reference standard

Scope of the programme

The products covered by the certification standard are heat pumps (HP), with a heating capacity less than or equal to 100 kW, and with a heating and/or cooling function belonging to the following categories:

  • Electrically driven HPs for space heating
  • Electrically driven HPs for heating swimming pool water
  • Electrically driven HPs for domestic hot water (DHW); with a stored volume of water less than or equal to 2 000 liters:
    • Dual-mode HPs, i.e. designed for space heating and DHW production; with a simultaneous or alternating operating function
    • HPs exclusively used for a collective DHW production; for a stored volume of water strictly greater than 400 liters
  • Gas absorption HPs
  • Gas internal combustion engine-driven (ICE) HPs
  • Gas external combustion engine-driven (ECE) HPs

In the case of HP with separate components (split or multi-split), the assembly of such components is deemed to be an inseparable system for determining the certified performance.

The HP concerned by the certification have one of the following exchange types:

  • “outdoor air / recycled air”
  • “exhaust air / fresh air”
  • “outdoor air / water”
  • "exhaust air / water”
  • “(ground) water / recycled air”
  • “water (loop) / recycled air”
  • “brine water / water”
  • “brine water / brine water on geothermal collector”
  • “brine water / water on solar collector”
  • “(ground) water / water”
  • “ground / ground”
  • “ground / water”
  • “water / ground”
  • “outdoor air/ground”

Certified performance

  • The energy performance:
    • coefficient of performance (COP or GUEh)
    • heating capacity (Ph or QNh)
    • electric input power (Peh)
    • cooling efficiency (EER or GUEc)
    • cooling capacity (Pc or QNc)
    • electric input power (Pec)
  • Sound power level (Lw)
  • Share of electrical power for the auxiliaries (Taux)
  • Seasonal performance levels for electrically driven HPs (only for air/air, air/water, water/water and brine water/water) :
    • seasonal performance coefficient (SCOP ou SEER)
    • net seasonal performance coefficient (SCOPnet)
    • seasonal energy efficiency (ηsh ou ηsc)
  • Seasonal performance levels for gas HPs :
    • The reference seasonal gas utilisation efficiency (SGUEh ou SGUEc)
    • The reference seasonal primary energy efficiency (SPERh ou SPERc)
    • Seasonal energy efficiency (ηsh ou ηsc)
  • For variable power regulation HPs :
    • minimum load rate in continuous operation (LRcontmin),
    • COP (ou GUEh) at LRcontmin,
    • performance correction coefficient at LRcontmin (CcpLRcontmin).
  • For DHW :
    • The heating-up time (th)
    • The spare capacity (Pes)
    • The reference hot water temperature (q’WH)
    • The volume of mixed water at 40°C (V40)
    • Daily consumption for the draw-off cycle in question (Qelec)
    • Annual consumption (AEC)
    • The global performance coefficient for a given tapping cycle (COPglobal)
    • The performance coefficient in DHW production mode (COPDHW)
    • energy efficiency for water heating (ηWH)
    • The reheating time (tR)
    • The proportion of renewable energy

Definitions

Electrically driven HP

A heat pump range comprises products with the same components, namely:

  • Same refrigeration process
  • same refrigerant
  • same compressor type
  • same expansion valve type
  • same evaporator type
  • same condenser type
  • same defrosting principle
  • same power regulation principle

Dual-mode HP

A simultaneous operation dual-mode heat pump is a system composed of:

  • a heat pump
  • a storage tank
  • a control system
  • accessories

An alternating operation dual-mode HP is a system composed of:

  • a heat pump,
  • a storage tank,
  • a control system,
  • a hydraulic circuit switching component
  • one or more circulation pump(s)
  • an intermediate exchanger
  • accessories

Gas absorption HP

A gas absorption heat pump system consists of the following components:

  • a boiler (generator)
  • a gas burner and the components required to supply the combustion air and discharge the combustion products
  • a refrigeration circuit
  • a condenser
  • an expansion device
  • an evaporator
  • an absorber
  • a solution pump
  • a control system
  • exchanger(s)

An absorption heat pump range comprises products with the same components:

  • same refrigeration process
  • same refrigerant
  • same boiler (generator) type
  • same expansion valve type
  • same evaporator type
  • same absorber type
  • same solution pump type
  • same condenser type
  • same defrosting principle
  • same power regulation principle
  • same exchanger type

Gas ICE HP

An IC engine-driven gas heat pump system consists of the following components:

  • a gas heat engine
  • a heat sink
  • one or more compressor(s)
  • a refrigeration circuit
  • a condenser
  • an expansion device
  • an evaporator
  • a control system

An IC engine-driven gas heat pump range comprises products with the same components:

  • same refrigeration process
  • same refrigerant
  • same heat engine type
  • same compressor type
  • same expansion valve type
  • same heat recovery unit type
  • same evaporator type
  • same condenser type
  • same defrosting principle
  • same power regulation principle
  • same heat recovery regulation principle

Gas ECE HP

An external combustion compressor-driven gas heat pump system consists of the following components:

  • a regenerative compressor
  • a gas cooler
  • a refrigeration circuit
  • an expansion device
  • an evaporator
  • a control system
  • a heating element with burners and the components required to supply the combustion air and discharge the combustion products
  • a condenser exchanger for combustion products including auxiliary gas

An external combustion compressor-driven gas heat pump range comprises products with the same components:

  • same refrigeration process
  • same refrigerant
  • same regenerative compressor type
  • same gas cooler type
  • same expansion valve type
  • same evaporator type
  • same defrosting principle
  • same power regulation principle