Samsung WindFree wall units spread air through a micro-hole panel so the draught feels softer once the room is near setpoint. Mitsubishi MSZ-AY is a conventional louvre indoor with very low fan sound and a deeper UK bedroom install base. Compare the same nominal cooling kW. WindFree mode is a comfort feature, not extra kilowatts, and full-power cooling still throws air. Both need an outdoor unit and an F-gas install.
Someone sitting under the indoor on a high fan
In the gentle mode, supply air leaves through the perforated panel rather than as a hard jet from the louvre. Fast cool still uses a normal throw, so anyone sitting under the unit on high fan will feel it. The nameplate capacity is the hard-working mode.
AY does not pretend to be still air. It moves air quietly, with a very low bottom fan speed, which is why bedrooms specify it. If you hate any sensation of air on the sofa, WindFree is the demo to sit through. If you hate compressor noise at night, start with outdoor position, then AY's sound sheet.
Gentle airflow, then the hard-working mode
SmartThings and MELCloud are different apps. Confirm the interface is included.
- WindFree: softer airflow after the room has been pulled down.
- AY: conventional discharge, very quiet low fan, common UK bedroom spec.
- Same cooling kW before brand loyalty.
A living-room jet and a shut bedroom
A living room where people sit in the discharge path is where WindFree earns its keep. A shut bedroom is where AY's low fan speed is the usual winner, provided the condenser is not on that same wall. Either can be wrong if the kW is short for the glass.
Samsung's UK installer base is real and thinner than Mitsubishi's in many towns. That is a service fact. It is not a claim that WindFree hardware is fragile. Prefer a firm that fits Samsung often if you choose it. Mitsubishi Electric's domestic base is why AY is the common bedroom comparison.
Filter panels, sound sheets and the 2026 band
As a 2026 illustration, both sit in the ordinary single-split installed band, high hundreds to a few thousand pounds including VAT for a straightforward house. WindFree is not the cheapest wall unit in the market, and AY is not the dearest Mitsubishi. Distributor deals move the gap around.
Ask for sound data and efficiency on the exact size. A SEER from another capacity, or from a cassette, does not belong on this comparison. Filter cleaning on a WindFree panel is a fair question next to AY's simpler fascia. Energy Saving Trust describes the air-to-air heat pump both products are when they heat as well as cool. GOV.UK F-gas rules apply to either outdoor unit.
Stop if the gentle mode is how you sized the room
Do not size the room on the gentle setting. State the room, whether people sit under the indoor, and whether night sound is the priority. Ask for one cooling kW, one outdoor position and one drain. Then the choice is draught feel versus bedroom fan sound and local support. AY is the safer assumption for lowest indoor fan sound, but check the sheets for your kW. The outdoor unit can still be the louder machine. Isolate it and keep it off bedroom windows.
Frequently asked questions
Does WindFree cool with no airflow at all?
No. It still moves air, more gently in that mode. Boost and recovery settings feel like a normal split. Do not size the room as if the gentle mode were the full capacity.
Can I put a WindFree indoor on a Mitsubishi outdoor?
No. Matched systems only. Mixing brands is how warranties and refrigerant control disappear.
Core buying guides
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How this guide was prepared
This guide was written by the Local AC Installers Editorial Team. We compare official guidance, legislation and established consumer information, separate general information from project-specific advice, and show publication dates and sources. We do not accept installer accreditation claims at face value.