Heat pumps · Compare

OUTES AHb08VR9HP vs STIEBEL ELTRON LWZ 07.1 Premium HKL 230

SCOP (35 °C): OUTES AHb08VR9HP 4.98, STIEBEL ELTRON LWZ 07.1 Premium HKL 230 4.2. The OUTES AHb08VR9HP is better on 8 of 14 comparable points.

Who wins where

  • OUTES AHb08VR9HP
  • STIEBEL ELTRON LWZ 07.1 Premium HKL 230
PerformanceEfficiencyNoiseRefrigerantConnectivity & smartGrants & market
Performance: OUTES AHb08VR9HP 26, STIEBEL ELTRON LWZ 07.1 Premium HKL 230 28; Efficiency: OUTES AHb08VR9HP 64, STIEBEL ELTRON LWZ 07.1 Premium HKL 230 24; Noise: OUTES AHb08VR9HP 26, STIEBEL ELTRON LWZ 07.1 Premium HKL 230 43; Refrigerant: OUTES AHb08VR9HP 84, STIEBEL ELTRON LWZ 07.1 Premium HKL 230 75; Connectivity & smart: OUTES AHb08VR9HP 50, STIEBEL ELTRON LWZ 07.1 Premium HKL 230 50; Grants & market: OUTES AHb08VR9HP 17, STIEBEL ELTRON LWZ 07.1 Premium HKL 230 13

Biggest differences

FactAHb08VR9HPLWZ 07.1 Premium HKL 230
Refrigerant charge0.9 kg1.24 kg
COP A2/W354.753.97
Seasonal efficiency ηs 35 °C196 %165 %
SCOP (35 °C)4.984.2
Seasonal efficiency ηs 55 °C149 %128 %
SCOP (55 °C)3.83.28
All specifications ↓

Score per area = position (0–100) relative to all 1350 models in this category; higher is better.

Technical specifications OUTESAHb08VR9HP STIEBEL ELTRONLWZ 07.1 Premium HKL 230
Grants & market
SEAI Heat Pump System Grant €14,500€14,500
General
Type (source) Air-to-water 1 Air-to-water 1
Performance
Heating capacity (A7/W35) – 2.71 kW 2
Rated output 35 °C 7.22 kW 1 7.23 kW ✓ 1
Rated output 55 °C 6.94 kW 1 7.27 kW ✓ 1
Efficiency
SCOP (35 °C) 4.98 ✓ 1 4.2 1
SCOP (55 °C) 3.8 ✓ 1 3.28 1
Seasonal efficiency ηs 35 °C 196 % ✓ 1 165 % 1
Seasonal efficiency ηs 55 °C 149 % ✓ 1 128 % 1
Energy label 35 °C – A, , 2
Energy label 55 °C – A, , 2
COP A7/W35 5 1 5.77 ✓ 1
COP A2/W35 4.75 ✓ 1 3.97 1
COP A-7/W35 3.01 ✓ 1 2.71 1
Noise
Outdoor unit sound power 60 dB(A) 1 56 dB(A) ✓ 1
Indoor unit sound power – 53 dB(A) 1
Refrigerant
Refrigerant R290 1 R290 1
Refrigerant GWP 3 3 3 2
Refrigerant charge 0.9 kg ✓ 1 1.24 kg 1
Electrical
Max. power input 3.5 kW 1 12.55 kW 1
Connectivity & smart
SG Ready Yes 1 Yes 1
Grants & market
ISDE grant (NL) 2,575 € ✓ 3 2,375 € 3

Sources

  1. List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026
  2. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
  3. ISDE heat pump notification code list — Rijksdienst voor Ondernemend Nederland (RVO) · accessed 28 Sept 2026