De'Longhi Pinguino vs Midea PortaSplit: The European AC Showdown

The De'Longhi Pinguino and the Midea PortaSplit are the two portable AC models most frequently compared by European buyers searching for a cooling solution that requires no permanent installation. They sit at opposite ends of the portable AC architecture spectrum: the Pinguino is a single-hose monoblock (a self-contained unit that houses both the evaporator and condenser in one cabinet and exhausts condenser heat through a flexible hose), while the PortaSplit is a true portable split system that separates the indoor evaporator head from the outdoor condenser across a window sill. That architectural difference is not a footnote — it is the defining variable in every performance comparison between the two.

What are the fundamental differences between the De'Longhi Pinguino and Midea PortaSplit?

The De'Longhi Pinguino is a monoblock portable AC: the entire refrigeration circuit — compressor, condenser coil, evaporator coil, and both fans — lives inside a single wheeled cabinet. It exhausts hot condenser air through a window hose, creating negative pressure in the room that draws warm outdoor air back in through door gaps and window seals. The Midea PortaSplit separates its condenser unit outside the window on a sill hanger bracket, connected to an indoor head via refrigerant lines. No room air is exhausted, so no make-up air infiltrates, and close to 100% of the rated cooling capacity reaches the room as useful cooling.

Both units share an important characteristic: neither requires drilling through walls or calling a refrigerant engineer, because the PortaSplit uses a pre-charged line set with push-connect fittings that the homeowner connects themselves. Setup time for the Pinguino is approximately 10 minutes; the PortaSplit requires 20–30 minutes to fit the sill bracket, seat the outdoor condenser, and thread the line set and power cable through the window panel. Both units are genuinely portable in the sense that they can be removed and reinstalled in a new property without permanent modification.

How do the De'Longhi Pinguino and Midea PortaSplit compare on specifications?

Comparing headline specifications directly is misleading unless the infiltration penalty is applied to the Pinguino's rated figures. The EER (Energy Efficiency Ratio — instantaneous cooling output in watts divided by electrical input in watts at a standardised test point) and SEER on the EU energy label for both units are measured under controlled laboratory conditions that do not capture the make-up air infiltration a single-hose unit causes in a real room. Applying the measured real-world infiltration correction of 20–35% to the Pinguino's effective cooling capacity produces a more honest comparison.

How much does the infiltration penalty actually cost the De'Longhi Pinguino?

The infiltration penalty is the Pinguino's defining limitation, and it is most severe on the days when you need cooling most. The Pinguino exhausts approximately 100–150 litres of conditioned room air per second through its exhaust hose. Every cubic metre of room air expelled must be replaced by outdoor air entering through gaps in the building envelope — and on a 35°C day, that make-up air is at 35°C rather than the 24°C set-point the compressor is working to achieve. published manufacturer specifications and EU EPREL entries testing consistently measures effective Pinguino cooling capacity at 60–80% of nameplate on hot days with a realistic door/window sealing standard.

The penalty shrinks on mild days (25°C outdoor temperature) where the make-up air is only a few degrees above set-point, which is why Pinguino owners often report satisfactory performance for most of the summer and then find the unit 'suddenly stops working' in a July heat spike. The machine has not changed — the outdoor temperature has moved past the point where infiltration heat gain exceeds the compressor's capacity to compensate. On those critical days, the PortaSplit's near-zero infiltration loss is the difference between reaching set-point and not.

Edge case: Pinguino performance in a very well-sealed modern flat versus a draughty Victorian terrace

In a highly airtight modern flat — typical of post-2015 Nordic or German construction with triple glazing and mechanical ventilation — the Pinguino's infiltration problem manifests differently. Make-up air cannot enter easily, so the room pressure drops, the exhaust hose struggles against back-pressure, and the condenser fan works harder, consuming more electricity and generating more noise. The unit may even trigger a high-temperature cutout because the condenser cannot reject heat efficiently. In a draughty Victorian terrace, the opposite applies: make-up air enters freely and the unit runs more smoothly, but you are effectively cooling the street. Neither scenario produces good results — the fundamental architecture is the problem, not the specific building type.

Which unit is easier to install and move between rooms?

The Pinguino wins unambiguously on installation simplicity: roll it to the window, fit the window adapter panel, connect the exhaust hose, and plug it in. The entire process takes under 15 minutes. Moving it between rooms requires unplugging, removing the hose and panel, wheeling to the new location, and reassembling the window kit — approximately 10 minutes each way. It genuinely lives up to the portable label. The PortaSplit is portable in a different, slower sense: each installation requires refitting the sill bracket and reconnecting the pre-charged refrigerant lines, which takes 20–40 minutes and requires a second person for condenser placement above ground level. It suits buyers who install it once per season and leave it in one window throughout summer.

Which unit costs more to run over a full European cooling season?

Running cost comparison must account for both rated SEER and real-world effective capacity. If you size both units at 9,000 BTU/h rated capacity for a 20 m² room, the PortaSplit delivers that cooling efficiently while the Pinguino delivers only 60–80% of it and may need to run longer — or may never reach set-point at all on the hottest days. Comparing pure electricity costs at their respective SEER ratings, using 500 equivalent full-load hours and the EU average domestic electricity price of €0.28/kWh (Eurostat 2023 data), shows a substantial operating cost gap over a full season.

How do indoor noise levels compare between the Pinguino and PortaSplit?

The De'Longhi Pinguino houses its compressor inside the room alongside the evaporator fan. Compressor mechanical noise — the piston or scroll mechanism, refrigerant flow, and vibration — radiates directly into the living space. Manufacturer spec sheets rate the Pinguino at 44–52 dB(A) at full load, measured at 1 metre from the unit. In a quiet bedroom at night, even the lower end of this range — equivalent to a moderately busy office — is intrusive, and many owners report running the unit on its lowest fan speed setting to reduce noise, which further reduces its already-penalised effective cooling.

The PortaSplit places the compressor and condenser fan outside the window. The indoor head contains only the evaporator fan — a relatively quiet blower motor with no mechanical compression noise. Indoor ratings of 40–46 dB(A) at medium speed and 28–36 dB(A) on the lowest inverter step are standard across the PortaSplit-class range, according to manufacturer spec sheets and published manufacturer specifications and EU EPREL entries testing. The compressor noise is audible outdoors, but for an occupant inside the room it is masked by the gentle hum of the indoor fan — a significant quality-of-life advantage, particularly for bedrooms and home offices.

Had a Pinguino for two summers. It was effective enough but the compressor vibration through the floor drove me mad at night. The portable split with the condenser outside is barely louder than a white-noise machine indoors. Completely different experience.

Who should buy the De'Longhi Pinguino and who should buy the Midea PortaSplit?

Neither unit is universally superior — the right choice depends on how you will use it, where you will install it, and how much you value installation flexibility versus cooling efficiency. Understanding where each product's strengths actually apply prevents the most common mistake: buying the Pinguino for convenience and being disappointed by its performance on the days that matter most.

• Buy the De'Longhi Pinguino if: you need to move the unit between multiple rooms regularly, your windows cannot support a sill bracket, you rent a property where any external bracket installation is prohibited, or your cooling season is short and mild (below 28°C peak outdoor temperatures) where infiltration is a minor issue.
• Buy the Midea PortaSplit if: you have a fixed primary room to cool (bedroom, home office, living room), your outdoor temperatures exceed 32°C during heatwave periods, you use the AC for more than 60 hours per month during summer, or indoor noise level matters — particularly for sleep or focused work.
• The Pinguino is the right choice for short-term use and maximum flexibility; the PortaSplit is the right choice for sustained comfort and long-term efficiency.
• For buyers who want both: some European households use a PortaSplit as the primary bedroom unit and a Pinguino as a roving supplement for the living room or kitchen — combining the efficiency of the split where it matters most with the flexibility of the monoblock elsewhere.

The Midea PortaSplit consistently sells out faster than the De'Longhi Pinguino when heatwave warnings are issued across Europe — its efficiency advantage is well known, and buyers who have previously owned a Pinguino are frequently looking to upgrade.