Heat pumps · MT

STIEBEL ELTRON WPE-I 33 H 400 Premium

The STIEBEL ELTRON WPE-I 33 H 400 Premium is a heat pump with SCOP (35 °C) 5.43 and refrigerant R410A.^1,2

Last updated: 18 October 2026Technical specifications Rules in Malta ⇄ Compare this model

SCOP (35 °C): 5.43²
Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.
Refrigerant: R410A¹
Official source
Type (source): Ground source¹
Official source
Rated output 35 °C: 33kW²
Official source
Rated output 55 °C: 31kW²
Official source

Rules in Malta

Water Heater Scheme (heat pump water heaters)

Unknown

REWS runs a national grant scheme for energy-efficient water heaters in homes; heat pump water heaters are eligible (alongside solar water heaters). The scheme has been extended to 31 December 2026, and part A of the application must be submitted before you buy and install the equipment. Grant amounts: see the REWS page (not verified by us).

Technical specifications

General
Type (source)	Ground source¹
Compressors	1¹
Capacity control	drehzahlregelung¹
Performance
Rated output 35 °C	33 kW²
Rated output 55 °C	31 kW²
Efficiency
SCOP (35 °C)	5.43²
SCOP (55 °C)	4.05²
Seasonal efficiency ηs 35 °C	214 %²
Seasonal efficiency ηs 55 °C	159 %²
Energy label 35 °C	A+++²
Energy label 55 °C	A+++²
Noise
Indoor unit sound power	47 dB(A)²
Refrigerant
Refrigerant	R410A¹
Refrigerant charge	3.9 kg¹
Electrical
Max. power input	16.6 kW¹
Connectivity & smart
SG Ready	Yes¹

How it ranks

SCOP (35 °C): better than 75% of comparable models in our database (Heat pumps · Ground source · ≥ 14 kW; n = 123).

Rank 30 of 124

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.

Similar models

Other brands, same type and a comparable size.

Frequently asked questions

What is the SCOP (35 °C) of the STIEBEL ELTRON WPE-I 33 H 400 Premium?

The SCOP (35 °C) of the STIEBEL ELTRON WPE-I 33 H 400 Premium is 5.43.^1,2

Which refrigerant does the STIEBEL ELTRON WPE-I 33 H 400 Premium use?

The refrigerant of the STIEBEL ELTRON WPE-I 33 H 400 Premium is R410A.^1,2

Sources

List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 18 Oct 2026
European Product Registry for Energy Labelling (EPREL) – heat pumps — Europese Commissie · accessed 15 Oct 2026
Water Heater Scheme (heat pump water heaters) — Regulator for Energy and Water Services (REWS)

Key figures