Comfort, forged to last.

Air conditioning installation, servicing and repair across Sussex & Surrey — fitted with the same care we bring to systems that simply can't fail.

REFCOM Registered F-Gas Certified Fully Insured
A calm, softly-lit bedroom with discreet air conditioning
Cool in summer, warm in winterLoft bedroom install, West Sussex
What we do

Installation. Servicing. Repair.

Whether it's a cooler bedroom for summer or comfortable air through a busy premises, we help you find the right system, fit it beautifully, and make sure it's working perfectly before we leave — with honest advice at every step.

Installation

New systems for homes, garden rooms, shops, salons, offices and server rooms — sized and specified for the space.

  • Discreet wall-mounted splits & multi-splits
  • Heating and cooling, all year round
  • Neat pipework, tested and commissioned
More on installation →

Servicing

Annual servicing and maintenance plans keep your system efficient, healthy and under warranty — and head off breakdowns before they start.

  • Filter clean & coil sanitisation
  • Refrigerant & leak checks
  • Full performance & safety inspection
More on servicing →

Repair

Fault-finding done properly — diagnosed, explained and fixed, never guessed at. Rapid response on all major manufacturers.

  • Leaks, sensors and electrical faults
  • Honest advice on repair vs replace
  • Priority call-outs for contract clients
More on repairs →
For business

Planned maintenance for the places that can't afford to overheat

Shops, pubs, salons, offices and server rooms — a planned maintenance contract keeps your cooling reliable and off your mind. Scheduled visits, priority response, tailored from a single unit to a full estate.

Ask about a contract
Systems we fit

The right system for the space

Every property is different. We recommend the system that genuinely suits the room, the building and the budget — and explain exactly why.

01

Wall-Mounted Splits

The go-to for bedrooms, living rooms and home offices. Discreet, whisper-quiet, and heats as beautifully as it cools.

02

Multi-Splits

One outdoor unit running several rooms — ideal where outdoor space is limited or you're conditioning the whole home.

03

Ceiling Cassettes

Flush-mounted units that sit neatly into the ceiling — the standard choice for shops, salons and open-plan spaces.

04

Ducted Systems

Fully concealed air conditioning with just a slim grille on show. For high-end homes and spaces where looks matter.

05

Server & Comms Rooms

Dedicated cooling for IT and comms spaces — sized for the heat load and built to keep sensitive equipment at a safe, steady temperature.

06

VRF / VRV

Larger commercial systems serving multiple zones from one condenser — for offices, hospitality and bigger premises.

Who we serve

Homes & businesses, alike

The same manufacturer-spec workmanship, whether it's a single bedroom or a whole premises.

Homes & Bedrooms Garden Rooms Home Offices Shops & Retail Pubs & Restaurants Hair & Beauty Salons Offices Server Rooms
A warm home office with air conditioning integrated into the space
Why Coolsmith

Done properly. Every time.

Behind Coolsmith is years of hands-on experience across every kind of air conditioning job — from a single bedroom split to full commercial systems. Clean installs, correct refrigerant handling, everything tested before we leave: the same careful standard comes with us into every home and business we work in.

REFCOM F-Gas Registered

Legally certified to handle refrigerants — required for any AC work.

Years of Experience

From domestic splits to larger commercial systems — we've worked on it all.

Manufacturer-Spec Installs

Correct cable, correct pipework, correct commissioning. No shortcuts.

Local & Accountable

A Sussex business you can still get hold of long after the install.

Service area

Sussex & Surrey

Based near Billingshurst, West Sussex — covering homes and businesses across both counties. Not sure if we reach you? Just ask.

HorshamBillingshurstCrawley GuildfordWorthingChichester Haywards HeathDorkingRedhill BrightonCranleighPetworth
Get a quote

Let's talk

Free, no-obligation quotes. Send a photo of the room or unit and we'll usually price it the same day.

Call or message us
07542 792033

Installation, servicing, repairs and maintenance contracts — one number for everything.

← Back to home Our services

Air Conditioning Installation

Expertly fitted air conditioning across Sussex & Surrey — for homes, garden rooms, shops, salons, offices and server rooms. Whatever the size of the project, you get the same manufacturer-spec workmanship from first survey to final handover.

How an installation works

1

Free survey & quote

We visit (or work from your photos), size the system properly for the space, and give you a clear written quote — no vague estimates, no pressure.

2

Installation day

Neat pipework, correct cabling, tidy containment and genuine respect for your property. Most single-room installs are completed in a day.

3

Testing & commissioning

Every system is pressure-tested, vacuumed, commissioned to manufacturer spec and run-tested in both heating and cooling before we sign it off.

4

Handover & aftercare

We walk you through the controls, register your warranty, and stay on the end of the phone. We don't disappear once we're paid.

What's included

  • On-site consultation and correct system sizing
  • Premium Japanese equipment — Daikin, Mitsubishi Electric, Toshiba, Fujitsu
  • Heating and cooling from one system, all year round
  • Energy-efficient units to keep running costs low
  • Full testing, commissioning and an operational walkthrough
  • Manufacturer warranty, registered for you

Homes and businesses

From a single bedroom split or garden room to multi-room systems, ceiling cassettes for shops and salons, and dedicated cooling for server and comms rooms — we install systems sized and specified for the space, and we'll always explain the reasoning behind what we recommend.

← Back to home Our services

Servicing & Maintenance

Regular maintenance is the difference between a system that quietly does its job for fifteen years and one that fails in the first heatwave. We service all major brands across Sussex & Surrey.

Why regular servicing matters

  • Prevent avoidable breakdowns — most failures we attend began as small, cheap-to-fix issues that were never caught.
  • Protect your warranty — manufacturers require annual servicing by a certified engineer to keep it valid.
  • Lower running costs — clean coils and filters noticeably cut energy use; a struggling system costs more every hour it runs.
  • Healthier air — coil sanitisation and filter cleaning keep the air you're breathing fresh.
  • Longer system life — well-maintained systems simply last years longer.

What a Coolsmith service includes

  • Filter clean and coil sanitisation, indoor and outdoor
  • Refrigerant checks and leak inspection
  • Electrical connections and terminal inspection
  • Condensate drain check and clean
  • Full performance test in heating and cooling
  • A straightforward report of anything worth keeping an eye on

Maintenance contracts for business

If cooling matters to your trade — shops, pubs, salons, offices, server rooms — a planned maintenance contract keeps it reliable and off your mind: scheduled visits, priority response when something does go wrong, and one less thing to think about. Tailored to your premises and budget, from a single unit to a full estate.

← Back to home Our services

Repairs & Callouts

Fault-finding done properly — diagnosed, explained and fixed, not guessed at. Rapid-response repairs for homes and businesses across Sussex & Surrey, on all major manufacturers.

Signs your system needs attention

  • Not cooling or heating like it used to, or weak airflow
  • Unusual noises, rattles or vibration
  • Water dripping from the indoor unit
  • Bad or musty smells when running
  • Error codes or flashing lights on the unit
  • Tripping electrics or frequent shutdowns

Caught early, most of these are quick, inexpensive fixes. Left alone, they tend to become compressor or circuit-board failures — the expensive end of the scale. If you spot any of the above, it's worth a call sooner rather than later.

How we handle repairs

1

Diagnose

Proper fault-finding with the right test equipment — we find the cause, not just the symptom.

2

Explain

A plain-English explanation of what's wrong and a clear price before any work begins.

3

Fix

Repaired with correct parts and correct refrigerant handling — we're REFCOM F-Gas registered, as the law requires.

Honest advice on repair vs replace

Sometimes a repair isn't the right answer. If a system is old, inefficient and on its third fault, we'll tell you straight and price both options so you can decide. What we won't do is keep patching something that's costing you money.

Business & priority callouts

For commercial customers, a breakdown costs trade. Our maintenance-contract clients get priority response when something goes wrong — if cooling matters to your business, ask us about a contract.

← Back to home Who we serve

Domestic Air Conditioning

Your home should feel comfortable all year round — cool in a heatwave, warm on a cold morning, and quiet the rest of the time. We design and fit systems that suit the room, the house and the way you actually live in it.

Bedrooms

The most popular install we do, for good reason: a properly sized, quiet wall-mounted unit turns sticky summer nights into proper sleep. Modern units run at a whisper on night mode, and warm the room in winter too.

Living areas

Open-plan spaces and lounges need a little more thought — unit position, airflow and sizing matter more in bigger rooms. We'll recommend a discreet setup that keeps the whole space comfortable without blasting one sofa.

Home offices

If you work from home, you know a stuffy box room kills concentration. A small split holds your office at a steady temperature all day for pennies an hour — heating in January, cooling in July.

Garden rooms & outbuildings

Garden offices, gyms and studios heat up fast in summer and freeze in winter. Air conditioning is the single upgrade that makes them genuinely usable all year — and because they're detached, installation is usually straightforward.

Whole-home & multi-room

Conditioning several rooms? A multi-split runs multiple indoor units from one outdoor unit — tidier outside, and each room keeps its own control. We design the layout around your house rather than forcing a one-size-fits-all package.

← Back to home Who we serve

Commercial Air Conditioning

When cooling matters to your trade, it needs to be reliable, efficient and properly looked after. We install and maintain systems for businesses across Sussex & Surrey — with maintenance contracts that keep them running.

Shops & retail

Customers don't linger in a hot shop. Ceiling cassettes or discreet wall units keep the sales floor comfortable without getting in the way of your layout or your stock.

Pubs, restaurants & cafés

Busy service, kitchen heat and a full room add up fast. The right system keeps guests comfortable and staff working — and heats the space efficiently through winter trade too.

Hair & beauty salons

Dryers, tools and back-to-back clients make salons some of the hottest rooms we visit. Quiet, effective cooling keeps clients relaxed in the chair and your team comfortable through a full column of bookings.

Offices

Productivity drops when the temperature's wrong — it's the most common complaint in any workplace. We fit systems sized for real occupancy, with sensible controls your team won't fight over.

Server & comms rooms

IT equipment fails when it overheats, and it rarely fails quietly. We design server and comms room cooling with reliability in mind — sized for the heat load and specified to keep your equipment running at a safe, steady temperature.

Maintenance contracts

Every commercial customer is offered a planned maintenance contract: scheduled servicing, priority response when something goes wrong, and one less thing on your list. Tailored to your premises, from a single unit to a full estate.