Heat pump water heaters · Compare

Nuova WPB275AG-MB vs WEBER X 300-1W

Water heating efficiency ηwh: Nuova WPB275AG-MB 144 %, WEBER X 300-1W 117 %. The Nuova WPB275AG-MB is better on 8 of 9 comparable points.

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Both models in detail

Who wins where

  • Nuova WPB275AG-MB
  • WEBER X 300-1W
EfficiencyNoiseConnectivity & smart
Efficiency: Nuova WPB275AG-MB 61, WEBER X 300-1W 27; Noise: Nuova WPB275AG-MB 52, WEBER X 300-1W 37; Connectivity & smart: Nuova WPB275AG-MB 59, WEBER X 300-1W 59

Biggest differences

FactWPB275AG-MB300-1W
Annual electricity use (average climate)278 kWh1,389 kWh
Water heating efficiency ηwh144 %117 %
Annual electricity use, colder climate1,276 kWh1,467 kWh
Annual electricity use, warmer climate1,073 kWh1,205 kWh
ηwh, colder climate131 %117 %
ηwh, warmer climate156 %140 %
All specifications ↓

Score per area = position (0–100) relative to all 450 models in this category; higher is better.

Technical specificationsNuovaWPB275AG-MBWEBER X300-1W
General
Load profileXL1XL2
Efficiency
Water heating efficiency ηwh144 %✓1117 %2
ηwh, colder climate131 %✓1117 %2
ηwh, warmer climate156 %✓1140 %2
Energy labelA+1A+2
Annual electricity use (average climate)278 kWh✓11,389 kWh2
Annual electricity use, colder climate1,276 kWh✓11,467 kWh2
Annual electricity use, warmer climate1,073 kWh✓11,205 kWh2
Noise
Indoor sound power51 dB(A)✓155 dB(A)2
Outdoor sound power54 dB(A)✓155 dB(A)2
Connectivity & smart
Smart controlYes1Yes2

Frequently asked questions

Which is better: the Nuova WPB275AG-MB or the WEBER X 300-1W?

Water heating efficiency ηwh: Nuova WPB275AG-MB 144 %, WEBER X 300-1W 117 %. The Nuova WPB275AG-MB is better on 8 of 9 comparable points.

What is the water heating efficiency ηwh of the Nuova WPB275AG-MB and the WEBER X 300-1W?

Nuova WPB275AG-MB: 144 %. WEBER X 300-1W: 117 %.

Which is better on annual electricity use (average climate): the Nuova WPB275AG-MB or the WEBER X 300-1W?

Nuova WPB275AG-MB: 278 kWh. WEBER X 300-1W: 1,389 kWh.

Which is better on annual electricity use, colder climate: the Nuova WPB275AG-MB or the WEBER X 300-1W?

Nuova WPB275AG-MB: 1,276 kWh. WEBER X 300-1W: 1,467 kWh.

How we collect and check this data →

Sources

  1. European Product Registry for Energy Labelling (EPREL) – water heaters — Europese Commissie · accessed Oct 13, 2026
  2. European Product Registry for Energy Labelling (EPREL) – water heaters — Europese Commissie · accessed Oct 13, 2026