Best air con for old houses and cottages in 2026

Old houses were built to breathe. Modern air conditioning was designed for tighter, insulated homes. Making the two work together needs the right unit, the right install approach, and a good installer.

What “old house” actually means for air con

Three specific challenges:

1. Solid brick walls. Modern cavity walls have an easy path for the refrigerant pipes. Solid Victorian brick means longer core drills, potentially through structural masonry.
2. Uneven wall temperatures. Old plaster on stone or brick heats and cools unevenly. Sensors calibrated for modern homes over-cycle in a stone cottage.
3. Character conservation. Listed status or personal preference often rules out white plastic wall units in a period room.

None of these are dealbreakers. All of them shape which unit and install approach fits.

The three best units for period homes in 2026

Fujitsu LU25 - the discreet wall-mount

The Fujitsu LU series comes in a matt off-white finish that vanishes against traditional cream or magnolia walls. Slim depth (17 cm) sits close to plaster without dominating the room. The unit itself is competent rather than best-in-class, but the aesthetic makes it the right choice for cottages and Victorian terraces.

Fitted, £1,900 to £2,400 for a single indoor head.

Daikin Emura FTXJ25-A - the design piece

The Emura is Daikin’s design range. Slim glass front, matt silver, more of a piece of interior furniture than a functional appliance. Runs quiet (19 dB), heats to minus 15 degrees outside, and hides in a modern refurbishment of an older property.

Fitted, £2,700 to £3,300 for a single indoor head.

Mitsubishi Electric MSZ-EF - the wood-effect

The MSZ-EF is available in “wood” and “silver” finishes as well as white. Not a real wood veneer but a printed matt effect that reads warm rather than plastic in a period room. Same underlying kit as the standard MSZ range.

Fitted, £2,200 to £2,700 for a single indoor head.

When wall mounts do not work

Some period rooms cannot take a wall unit at all. Two alternatives:

Floor-mounted consoles. Sit at skirting board height and blow across the room from below. Look like a modern radiator, easier to hide behind furniture. Daikin and Mitsubishi Electric both make console units at similar prices to wall-mounts.

Ceiling cassettes. Sit flush in the ceiling, only the grille shows. Best for rooms with a suspended ceiling or a big enough loft void above. Expensive to fit into a plaster-and-lath ceiling but discreet.

For a listed drawing room, a floor console is often the answer no one considers first.

The install challenges you should know about

Solid brick core drilling costs more than modern cavity work. Budget £200 to £400 extra for a period property install to cover longer drilling and more delicate finishing work around old plaster.

Old wiring needs checking. Air con condensers need their own fused spur. A house with 1950s wiring may need a small consumer unit upgrade before the install can proceed. That is a £150 to £400 addition, and worth catching at the survey stage.

Listed buildings need Listed Building Consent for any external unit visible from public view. The outdoor condenser cannot go on the front elevation without consent, which is rarely granted. Rear elevations and gardens are usually fine. Check with your council before booking.

Two mistakes we see in period property quotes

1. Installers quoting the same day rate as a modern semi. A cottage or Victorian terrace takes longer. If the quote does not reflect that, expect a variation on install day.
2. Installers proposing to route pipes through the loft on a 1900s cottage with lime plaster. The heat expansion in an unheated loft eventually cracks the pipe union. Better to route externally where possible.

Get three quotes for a period property

Tell us “listed” or “period” or “cottage” in the comments on the quote form. We will match you with installers who work on older properties routinely - the wrong installer for a period home makes what should be a good job into a two-week saga.

Three fixed quotes back within 24 hours.