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Heat pumps · IE

NIBE S1157-13 EM 1X230V

The NIBE S1157-13 EM 1X230V is a heat pump with SCOP (35 °C) 5.43 and refrigerant R290.1,2

Last updated: Technical specificationsRules in Ireland⇄ Compare this model
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SCOP (35 °C)
5.432

Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.

Refrigerant
R2901
Official source
Type (source)
Ground source1
Official source
Rated output 35 °C
12kW2
Official source
Rated output 55 °C
12kW2
Official source
IE

Rules in Ireland

SEAI Heat Pump System Grant

Check conditions

€14,5003Maximum for a house, incl. €2,000 boiler scrappage

Up to €14,500 for a house (€11,500 for an apartment), including a €2,000 boiler scrappage grant when an oil, gas, solid-fuel or storage-heater system is removed. Homes built before 2007 need a technical assessment (€200 grant) unless the BER shows a Heat Loss Indicator of 2.3 or less. Installation is charged at 9% VAT.4

  • The heat pump must be listed on SEAI's Home Appliance Register of Performance (HARP) and installed by an SEAI-registered contractor.
  • Home built and occupied before 2021, with an MPRN; grant approval before any work starts and a BER assessment afterwards.

Heat pumps: grants and rules in Ireland →

Technical specifications

General
Type (source)Ground source1
Performance
Rated output 35 °C12 kW2
Rated output 55 °C12 kW2
Efficiency
SCOP (35 °C)5.432
SCOP (55 °C)4.12
Seasonal efficiency ηs 35 °C214 %2
Seasonal efficiency ηs 55 °C161 %2
Energy label 35 °CA+++2
Energy label 55 °CA+++2
Noise
Indoor unit sound power43 dB(A)2
Refrigerant
RefrigerantR2901
Refrigerant GWP31
Refrigerant charge0.54 kg1

How it ranks

SCOP (35 °C): better than 69% of comparable models in our database (Heat pumps · Ground source · 10–14 kW; n = 46).

Rank 15 of 47

Compared with every model on VersusIndex in the same group with a known value; equal values do not count as better. This says nothing about price, installation or reliability.

Variants

This model is registered in 17 combinations (for example with a different indoor unit or cylinder) with exactly the same performance. All figures on this page apply to each of these types. The part of the type number that differs is in bold; small differences (e.g. cylinder volume or anode) are listed after it:

  • S1157-13 EM 1X230V
  • S1157-13 EM 3X230V
  • S1157-13 EM 3X400V
  • S1157-13 PC EM 1X230V
  • S1157-13 PC EM 3X400V
  • S1157-13 T EM 3X400V
  • S1257-13 CU EM 3X400V
  • S1257-13 CU PC EM 3X400V
  • S1257-13 E EM 3X400V
  • S1257-13 E PC EM 3X400V
  • S1257-13 E T EM 3X400V
  • S1257-13 R EM 1X230V
  • S1257-13 R EM 1X230V UK
  • S1257-13 R EM 3X230V
  • S1257-13 R EM 3X400V
  • S1257-13 R PC EM 1X230V
  • S1257-13 R PC EM 3X400V

Similar models

Other brands, same type and a comparable size.

More from NIBE

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How we collect and check this data →

Frequently asked questions

What is the SCOP (35 °C) of the NIBE S1157-13 EM 1X230V?

The SCOP (35 °C) of the NIBE S1157-13 EM 1X230V is 5.43.1,2

Which refrigerant does the NIBE S1157-13 EM 1X230V use?

The refrigerant of the NIBE S1157-13 EM 1X230V is R290.1,2

How much SEAI grant can you get for the NIBE S1157-13 EM 1X230V?

Up to €14,500 with the SEAI Heat Pump System Grant, including €2,000 boiler scrappage when an oil, gas, solid-fuel or storage-heater system is removed (€11,500 for an apartment). The home must be built and occupied before 2021, the heat pump must be on SEAI's HARP register and you need grant approval before work starts.1,2

Sources

  1. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 18 Oct 2026
  2. European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed 15 Oct 2026
  3. Heat Pump System Grants — SEAI · accessed 4 Oct 2026
  4. Heat pump heating system (VAT) — Revenue · accessed 4 Oct 2026