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Inventor ATS14T/HU160T9 vs Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002

SCOP (35 °C): Inventor ATS14T/HU160T9 4.72, Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002 4.85. The Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002 is better on 11 of 16 comparable points.

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Who wins where

  • Inventor ATS14T/HU160T9
  • Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002
PerformanceEfficiencyNoiseRefrigerantConnectivity & smart

Biggest differences

FactATS14T/HU160T9Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002
Refrigerant GWP6753
Heating capacity (A7/W35)14.5 kW8.5 kW
Outdoor unit sound power65 dB(A)48 dB(A)
COP A7/W354.76.2
Seasonal efficiency ηs 55 °C136 %153 %
SCOP (55 °C)3.483.9
All specifications ↓

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

InventorATS14T/HU160T9ViessmannVitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002
Grants & market
SEAI Heat Pump System Grant€14,500–
General
Type (source)Air-to-water1Air-to-water1
System–Hybrid (with gas boiler)1
Performance
Heating capacity (A7/W35)14.5 kW✓28.5 kW3
Rated output 35 °C13.73 kW✓113.29 kW1
Rated output 55 °C12.08 kW112.09 kW✓1
Min. outdoor temperature-22 °C✓2-20 °C3
Efficiency
SCOP (35 °C)4.7214.85✓1
SCOP (55 °C)3.4813.9✓1
Seasonal efficiency ηs 35 °C186 %1190 %✓1
Seasonal efficiency ηs 55 °C136 %1153 %✓1
Energy label 35 °CA+++2A+++3
Energy label 55 °CA++2A+++3
COP A7/W354.716.2✓1
COP A2/W354.5215✓1
COP A-7/W352.7912.8✓1
Noise
Outdoor unit sound power65 dB(A)148 dB(A)✓1
Indoor unit sound power43 dB(A)140 dB(A)✓1
Refrigerant
RefrigerantR321R2901
Refrigerant GWP67523✓3
Refrigerant charge1.84 kg✓12 kg1
Electrical
Max. power input3.15 kW11.6 kW1
Connectivity & smart
SG ReadyYes1Yes1

Frequently asked questions

Which is better: the Inventor ATS14T/HU160T9 or the Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002?

SCOP (35 °C): Inventor ATS14T/HU160T9 4.72, Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002 4.85. The Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002 is better on 11 of 16 comparable points.

What is the SCOP (35 °C) of the Inventor ATS14T/HU160T9 and the Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002?

Inventor ATS14T/HU160T9: 4.72. Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002: 4.85.

Which is better on refrigerant GWP: the Inventor ATS14T/HU160T9 or the Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002?

Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002: 3. Inventor ATS14T/HU160T9: 675.

Which is better on heating capacity (A7/W35): the Inventor ATS14T/HU160T9 or the Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002?

Inventor ATS14T/HU160T9: 14.5 kW. Viessmann Vitocal 250-A IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.16-400-V002: 8.5 kW.

How we collect and check this data →

Sources

  1. List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 28 Sept 2026
  2. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
  3. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026