Prices in euros from Amazon.de, as of 11 June 2026. Prices and availability may differ on Amazon.co.uk.
No drilling, no outdoor unit, no asking the landlord: we compared six portable monoblock air conditioners that get by with an exhaust hose through the tilted window, from the cheap 7,000 BTU bedroom unit through the app-controlled Comfee to the A+++ De’Longhi for large rooms. Sorted by cooling capacity (BTU), room size, energy class, noise and smart features. All listed on Amazon.de, from €250.
Reasoning and all data in the table below
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Editorial rating based on manufacturer specs and Amazon catalogue data. We do not trial products ourselves. How we rate
| Model | Position | Cooling capacity | Room size | Energy class | Noise level | Smart/app | Price | Rating | Recommendation |
|---|---|---|---|---|---|---|---|---|---|
 01 · De’Longhi Pinguino PAC EX105★ A+++ · 10,000 BTU |
Our recommendation | 10,000 BTU | up to 40 m² | A+++ | quiet (Eco) | no | from €480 | 8,8 |
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 02 · Comfee Easy Cool 2.0App + Alexa |
Smart pick | 7,000 BTU | up to 25 m² | A | Sleep mode | App + Alexa | from €270 | 8,0 |
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 03 · Comfee Klimagerät ProA+ · R290 |
Energy-efficient | 10,000 BTU | up to 32 m² | A+ | Sleep mode | no | from €330 | 8,0 |
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 04 · De’Longhi Pinguino PAC N82 ECONight mode |
Quiet pick | about 8,000 BTU | up to about 32 m² | A | quiet (night mode) | no | from €350 | 8,2 |
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 05 · Comfee MPPH-09CRN79,000 BTU · 29 cm slim |
Compact mid-range | 9,000 BTU | up to 33 m² | A | medium | no | from €300 | 7,8 |
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 06 · Comfee MPPH-07CRN7cheapest monoblock |
Budget pick | 7,000 BTU | up to 25 m² | A | medium | no | from €250 | 7,4 |
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Which portable air conditioner suits your room, your budget and your need for quiet.
The most powerful and most economical appliance in the comparison: 10,000 BTU for rooms up to 40 m² and the only one with energy efficiency class A+++. EcoRealFeel technology regulates temperature and humidity together, so it feels cool at a higher setting, which saves power and keeps operation quieter. 24 h timer, dehumidifier. The premium pick for the living room.
One of the cheapest portable air conditioners with full smart features: control via app, Alexa, Google Home and IFTTT, for example pre-cooling before you come home. 7,000 BTU for rooms up to 25 m², 3-in-1 with sleep mode. Ideal for the bedroom and home office when remote control and automation matter.
The efficient all-rounder between entry-level and premium: 10,000 BTU for rooms up to 32 m², energy class A+ and the environmentally friendly R290 refrigerant. Cools, dehumidifies and ventilates, with sleep mode and 24 h timer. Lots of power and good efficiency at a mid price, for anyone who wants more than 7,000 BTU without paying for A+++.
Portable air conditioners are considered loud; the De’Longhi PAC N82 ECO is one of the more pleasant exceptions and has a night mode that turns down output and noise. Cools rooms up to about 32 m², dehumidifies and ventilates. Solid brand technology at a mid price when quiet in the bedroom is the priority.
More cooling power in a slim housing: 9,000 BTU for rooms up to 33 m² and, at only 29 cm width and depth, one of the most space-saving units. Cooling, dehumidifying, ventilating, wheels for moving around. The balanced mid-range all-rounder without an app premium.
If the air conditioner should simply cool reliably, without an app: 7,000 BTU for rooms up to 25 m², 3-in-1 with timer and wheels, often for around €250. Proven Comfee technology as the cheapest genuine monoblock in the comparison, ideal for the first hot summer in a rented flat.
For the rented flat, monoblock units are suitable because they need no fixed installation or outdoor unit: the exhaust hose is led through the tilted window. All six models here are monoblocks. A good window seal (fabric sail) is important so that no warm air flows back, which clearly increases cooling capacity.
Rule of thumb: about 1,000 BTU per 4 m² of well-insulated room. 7,000 BTU is enough for about 25 m² (bedroom), for example the Comfee MPPH-07CRN7. 9,000 BTU for about 33 m² (Comfee MPPH-09CRN7), 10,000 BTU for about 40 m² (De’Longhi EX105). In a loft flat or with a lot of sun, better go one size up.
Only units with an exhaust hose (monoblock) really cool a room, because they carry the waste heat outside. Units "without a hose" are pure air coolers/evaporators: they humidify and cool the air only minimally by a few degrees directly in front and otherwise even raise the humidity. For genuine cooling there is no way around the exhaust hose.
Portable monoblocks are never whisper-quiet, because the compressor sits inside the unit. The De’Longhi PAC N82 ECO is considered one of the quieter ones and has a night mode. Tip: pre-cool the bedroom during the day and switch to night/eco mode at night; that reduces noise and power consumption.
Portable air conditioners are power guzzlers: a 7,000 BTU unit (2.0 kW cooling capacity) draws about 0.8 kWh per hour, around 28 cents at 35 ct/kWh (the German electricity price). It is worth paying attention to the energy class: the De’Longhi EX105 with A+++ is much more economical than the A entry-level models. Timer and eco mode prevent unnecessary continuous running.
Against mould and damp air: compressor and mini dehumidifiers for cellar, bathroom and bedroom.
View comparison → Comparison · 6 modelsThe cheap alternative on moderately hot days: quiet tower, pedestal and table fans for the bedroom.
View comparison → Comparison · 6 modelsClean air against pollen and dust: quiet HEPA air purifiers from Levoit, Philips and others.
View comparison → CategoryAir conditioners, air purifiers, dehumidifiers, fans, thermostats: the whole category.
Open category →6 additional portable air conditioners from the current Amazon catalogue, with data sheet values and an editorial assessment.
Torn between two specific models? Here is the direct comparison: