The UK's most popular AC unit — quiet, efficient, and suitable for almost any room. Installed in Northampton with a free on-site survey and 5-year Bosch guarantee.
Wall mounted air conditioners are the unit we install over 90% of the time — and for good reason. They're the easiest to fit, the most cost-effective to buy and run, and the quietest type of air conditioning available. Mounted high on the wall, they cool or heat a room quickly and evenly without the strong gusts or operational noise of ceiling cassettes and industrial units.
All wall mounted units we supply are heat pumps — meaning they heat as efficiently as they cool. This makes them genuinely useful year-round: keeping bedrooms cool in summer and warm in winter, making conservatories comfortable in every season, and replacing or supplementing existing heating at a fraction of the running cost.
Most units also double up as a dehumidifier, actively removing excess moisture from the air — particularly useful in caravans, bedrooms and rooms prone to condensation.
The numbers behind why this is the right choice for most Northampton homes and businesses.
Most wall mounted units operate at around 19–25dB on their lowest setting — quieter than a whisper, and far below the threshold where you'd notice it. Portable units typically run at 50–65dB. The difference is enormous.
Because they're air-to-air heat pumps, wall mounted units are one of the most energy-efficient ways to heat a room in winter — producing 3–4 units of heat for every 1 unit of electricity consumed, beating standard electric heaters comprehensively.
Modern Bosch wall mounted units are up to A+++ rated. Over a 12-year lifespan, a properly sized and maintained unit will typically pay for itself twice over in energy savings compared to portable coolers and electric heaters.
All wall mounted units include a dehumidifier mode, removing excess moisture from the air independently of heating or cooling. Particularly effective in caravans, garden rooms and rooms with condensation problems.
Wall mounted units filter the air as they circulate it — capturing dust, pollen and particles that would otherwise stay airborne. A meaningful difference for allergy sufferers and households with pets.
With annual servicing, wall mounted units routinely last 10–12 years. THS engineers are still maintaining units from over a decade ago that run as well as the day they were installed. The investment holds its value.
When a customer asks what type of unit they should get, the answer is almost always a wall mounted system. They're the most affordable to install, the cheapest to run, and the least disruptive to fit. For everything from a single bedroom to a full office floor, a wall mounted unit gets the job done.
The only exceptions are large open-plan spaces or rooms where wall mounting isn't structurally possible — in which case ceiling cassettes or ducted systems are the alternative. Our surveyor will tell you which on the free visit.
Not sure which type of unit is right for your space? Here's how they compare across the things that matter most.
| Wall Mounted | Ceiling Cassette | Portable Unit | |
|---|---|---|---|
| Installation cost | ✓ Lowest | Mid-range | ✓ None |
| Running cost | ✓ Very low (A+++) | ✓ Very low | ✗ High |
| Noise level | ✓ ~20dB (whisper) | ~30dB | ✗ 55–65dB |
| Heat pump function | ✓ Yes | ✓ Yes | ✗ Usually no |
| Suitable for bedrooms | ✓ Yes | Sometimes | ✗ Too loud |
| Dehumidifier mode | ✓ Yes | ✓ Yes | Sometimes |
| Lifespan | ✓ 10–12 years | ✓ 10–12 years | ✗ 3–5 years |
| Best for large open spaces | Sometimes | ✓ Yes | ✗ Struggles |
Wall mounted units are suitable for almost every room type — here are the four most common installations we carry out.
Also commonly installed in: Bedrooms · Conservatories · Garden rooms · Garages · Dental and GP practices · Schools · Restaurants · Retail units · Server rooms — if you're not sure whether a wall mounted unit is right for your space, our surveyor will confirm on the free visit.
We visit your property, assess the room, check wall suitability, plan the pipe route to the outdoor unit, and give you a fixed-price quote on the day. No obligation.
Room dimensions, ceiling height, sun exposure and usage all affect which unit size is right. Getting this wrong means an undersized unit that struggles or an oversized one that short-cycles. We get it right.
Most single-unit installs complete in half a day. We protect your walls and floors throughout, make a small core hole for the pipework, and tidy up completely before leaving.
We walk you through the controls, set up the app if applicable, and issue your 5-year Bosch guarantee. Annual servicing keeps your warranty valid and your unit running at peak performance.
All our wall mounted installations use Worcester Bosch air conditioning systems — A+++ energy rated, exceptionally quiet, and built to last. Every unit we install comes with a 5-year guarantee on parts and labour, and Bosch's reputation for reliability means the units keep performing long after the guarantee period ends. We've been installing and maintaining Bosch systems for years and the consistency of the product is why we stick with it.
"We had Kirk out from THS to fit our new Bosch air conditioner. They did a fantastic job and so pleased with the installation. I highly recommended using THS and have recommended them to all my family and friends."
"Kirk fitted 3 AC units and done a fantastic job. They protected my walls and floors, cleaned up afterwards and left perfectly. I would highly recommend THS and their crew. Thanks again for the brilliant job!"
"Air conditioning — it's a no brainer! It's a lot less expensive than you think & with Kirk fitting it no redecoration is necessary. Definitely get yours ASAP — trust Kirk to source a great unit and do an excellent job."
THS Refrigeration & Air Conditioning
55 Booth Meadow Court
Northampton
NN3 8AZ
THS Refrigeration & Air Conditioning
55 Booth Meadow Court
Northampton
NN3 8AZ
