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4 monitors side by side.

6 h a day
  • Electricity at €0.2832 per kWh (household price with taxes, Eurostat 2026-S1).
  • 210 g CO₂e per kWh generated in 2023 (European Environment Agency). Counts use only, not manufacturing.
  • Qian

    QMF-TNF21-01
    B 21″Full HDLCD / LED

    €13.02 per year

    +€7.01 a year

  • Iggual

    IGG319840 - MTL21CP
    E 21″Full HDLCD / LED

    €9.30 per year

    +€3.29 a year

  • Cheapest to run

    Zeuslap

    Z21Lite
    C 21″Full HDLCD / LED100 Hz

    €6.02 per year

  • Planar

    PVE22F
    D 21″Full HDLCD / LED120 Hz

    €7.57 per year

    +€1.55 a year

Yearly running cost

Bars in proportion to the energy each model uses.

  • Qian QMF-TNF21-01 €13.02
  • Iggual IGG319840 - MTL21CP €9.30
  • Zeuslap Z21Lite €6.02
  • Planar PVE22F €7.57
Model Qian QMF-TNF21-01 Iggual IGG319840 - MTL21CP Zeuslap Z21Lite Planar PVE22F
Running cost
Running cost (per year) €13.02 €9.30 €6.02 €7.57
over 10 years €130 +€70 over 10 years €93 +€33 over 10 years €60 €76 +€16 over 10 years
kWh per year 46 32.9 21.2 26.7
kg CO₂e per year from electricity use 9.7 6.9 4.5 5.6
Specifications
Brand Qian Iggual Zeuslap Planar
Model QMF-TNF21-01 IGG319840 - MTL21CP Z21Lite PVE22F
Energy class B E C D
Screen size 21″ (54.6 cm) 21″ (54.6 cm) 21″ (54.6 cm) 21″ (54.5 cm)
Power in on mode (SDR) 21 W 15 W 9.7 W 12.2 W
Standby 0.5 W 0.1 W 0.4 W 0.3 W
Networked standby 0.5 W – 0 W –
Off mode 0.5 W – 0.3 W 0.3 W
Resolution 1920 × 1080 1920 × 1080 1920 × 1080 1920 × 1080
Aspect ratio 16:9 16:9 16:9 16:9
Panel LED LCD LCD LCD LCD
Refresh rate 75 Hz 75 Hz 100 Hz 120 Hz
Power supply External External External Internal
Guaranteed support 3 years 8 years 1 year 10 years
Software updates 3 years 8 years 1 year 10 years
Spare parts available 5 years 8 years 1 year 10 years
On the market since September 1, 2026 May 1, 2025 April 14, 2026 September 1, 2026
EPREL registration number 2836734 2320742 2692426 2817043
Energy class (HDR) – F – –
Power in on mode (HDR) – 16 W – –

Rows where the models differ are highlighted.