Fitted properly.
Serviced for life.
Chillston installs discreet air conditioning for homes across Beaconsfield, Marlow, Amersham and the surrounding villages. It heats as well as it cools, and we look after it every year so you never have to think about it.
It starts with a 15-minute call with Samuel.
One room, or the whole house
Every system we fit both cools and heats efficiently, so the bedroom that's comfortable in July is cheap to warm in January.
Single-room comfort
One indoor unit for a bedroom, home office or sitting room. Installed and commissioned in a day.
Whole-home multi-split
Two to five rooms from one quiet outdoor unit. Positions, pipe runs and controls planned before we drill a single hole.
Servicing & repair
For systems we fitted and ones we didn't. Coil and blower wheel cleaned, condensate flushed, pressures and electrics checked. Written report every visit.
Fixed price, agreed in writing before anything is ordered — no day rates, no variations invented on the day. A deposit covers the equipment; the balance is due only once the system is running as it should. Every installation carries our two-year workmanship guarantee, extended to five years while you’re a Chillston Care member.
You will see it every day for fifteen years
Most quotes name a model without ever asking what the room looks like.
Daikin Perfera
White, softly rounded, and the one most people picture when they picture air conditioning. In a bedroom or a study it sits quietly as part of the room, and it is the most efficient of the three.
- White
Daikin Stylish
189 mm deep, the slimmest of the three and one of the slimmest made. It sits closest to the wall, which helps above a bed, in a narrow room or under a sloping ceiling. Eight finishes, including wood-, fabric- and leather-effect fronts.
- White
- Silver
- Black
- Wood
- Fabric
- Leather
Daikin Emura
Curved front and back panels and, at 90 cm, the widest of the three. It is designed to be looked at, for a sitting room or a kitchen where hiding it was never going to work.
- Matt white
- Silver
- Matt black
How they compare. In the sizes most rooms need, up to 3.5 kW, all three carry the top A+++ energy label for cooling and for heating, and all three go down to 19 dB(A). Within that label, the Perfera is the most efficient. For cooling it uses 6–8% less electricity than the other two, about £2 a year on Daikin’s figures. For heating, which is where most of the electricity goes if you use it through the winter, the three are within 1% of each other. On a one-room system the Perfera’s outdoor unit is also a little larger: 92 cm wide against 84. In the larger sizes, for big rooms, all three drop to A++.
One outdoor unit can also run several rooms, with any mix of the three: the plain one where nobody looks, the wood or the black one where everybody does. The efficiency then depends on the combination, and your quote states it.
The unit outside, and the pipe to it
- Out of sight where the house allows. A side or rear wall, or on the ground behind a hedge or a garden wall, and away from your neighbours’ windows.
- Pipework indoors where it can go. Through a loft, a cupboard or under a floor. Where it has to run outside, it is boxed in neat trunking.
- Agreed before anything is ordered. Both positions and the pipe route are settled with you at the survey and written into your quote.
“The person who surveys your home is the person who installs your system, and the person who answers if you call next summer.”
No call centres, no rotating subcontractors, no van that never comes back. We take on the number of installations we can do properly, and look after every one for as long as you own it.
Samuel — Founder & EngineerChillston · the Chilterns
Five things most quotes skip
Every cut corner in this trade is invisible on the day and expensive three years later.
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Heat load
Every room measured — volume, glazing, which way it faces, what sits above it.
Guesswork oversizes the unit — cold but clammy, expensive to run, and short cycles shorten its life.
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Sound
Worked out at your neighbour’s nearest window — and the figure is on your quote.
The limit is 37 dB(A) (MCS 020, mandatory since 2025) and many skip it. Skipped, one complaint moves the unit at your cost — and you still have the neighbour.
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Planning
Your address checked against the national register while we are still in the house.
Conservation areas and Article 4 directions change where a unit may go. Better found before the quote than after.
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Warranty
Registered with Daikin and the commissioning documents uploaded, so the cover is live from the day we leave.
Many extended warranties depend on documented annual servicing, and may ask for proof at claim.
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Electrics
Carried out and certified by a registered electrician, notified under Part P.
The certificate comes in their name, not ours. The system is pressure-tested and commissioned, and you get the readings.
The same five things, every single time
This is our process, written down and the same on every job — one bedroom or a whole house.
- Every wall scanned before it is drilled. Cables and pipes found first, never discovered.
- Overshoes from the front door. On and off every time we come in, all day.
- Dust sheets the whole way — hall, stairs, landing, room. Not just under the ladder.
- Core dust caught at the wall as it is drilled, rather than swept off your carpet afterwards.
- Everything leaves with us — packaging, offcuts, and the old unit if there is one.
If we mark anything, we put it right at our cost.
How the day goes
Six drawings, from the dust sheets going down to the handover. Tap through them, or swipe.
A room usually takes a day, a whole house two or three. We confirm the day in writing beforehand, with a short list of what helps: clear space where each unit goes, and access to your fuse box and, if the pipes go through it, your loft.
- A 15-minute callWith Samuel, at a time you choose
- Free survey30–45 minutes, at your home
- Fixed quoteWritten and itemised, within 24 hours
- Install & handoverA room in a day, a house over two or three
- Looked afterWe book the Health Check, not you
You won’t have to remember
Air conditioning should be serviced once a year. That’s the manufacturers’ recommendation, not ours, and their extended warranties often depend on it.
- We contact you when your Health Check is due, never the other way round
- When we’re busiest, members come first
- One call-out a year, no charge to attend
- 15% off repairs, and a five-year workmanship guarantee on installations we’ve carried out
- Your system record, kept for warranty claims and house sales
For one indoor unit. £3 a month for each additional unit.
Cancel any time
Our first 50 members keep this price for as long as they’re members.
A one-off Health Check is £175 for one unit, plus £50 for each additional unit on the same visit. Members pay about a fifth less, with a call-out included, because we service each town in one go.
Book a free survey Already have air conditioning? It starts with a Health Check →Before you ask
What does it cost to run?
For cooling, Daikin rate a 2.5 kW Perfera at about 90 units of electricity a year, and a Stylish or Emura of the same size at about 100: around £24 to £26 a year at 26p a unit. For heating, every unit of electricity gives three to four units of warmth, so it costs a quarter to a third as much as a plug-in electric heater, and about the same as gas central heating. What it costs you depends on how you use it, so take these as a guide rather than a promise.
Is the electrical work included?
Yes. Every installation includes a dedicated circuit, installed and certified by a registered electrician and notified under Part P — the certificate comes to you in their name. The one thing that can change the price is your consumer unit. If there's a spare way, it's covered by the quoted price. If it's full, or old enough to need replacing, that is typically £400–£800 on top — and we tell you at the survey, not on install day.
Do I need planning permission?
Usually not. The rules changed on 29 May 2025 and most domestic air conditioning is now permitted development — the outdoor unit size limit went up, the one-metre boundary rule went, and systems that heat as well as cool were brought inside the rules. The main things that still change the answer are a cooling-only system and a listed building. We check your address as part of the free survey, before anything is ordered. Read the full guide →
Tell us about the room
We measure up, talk through unit positions and options with you, and follow with a fixed written quote inside 24 hours.
No obligation. You will get the quote and the time to think about it.
Prefer to talk? Call 01494 312303 — or email a photo of the room to samuel@chillston.com.
Samuel rings from 01494 312303. Need to move it? Reply to the confirmation email.
Booked
A confirmation is on its way to your inbox. If it would help, have a think about which rooms you are considering before we speak.
The Chilterns and surrounding villages
Choose your town for local detail — or get in touch wherever you are in the Chilterns.