Comfort thatstaysCOOLall year round.
Trusted heating and cooling specialists serving homes and businesses across London. Same-day service, upfront pricing, no surprises.
18°
How It Works
From free quote to reliable cooling,done right every time.
No overbooked crews, no guesswork. Here's exactly what happens between requesting AC installation or maintenance and enjoying a cooling system that actually works when you need it.
Give Us a Call
Tell us what's going on, we'll get you on the schedule.
We're On Our Way
We'll text you when we're headed out.
We Get It Done
Install or tune-up, handled in one visit.
We Stand By It
Parts and labor covered, no fine print.
Our Services
Complete AC solutions for every building.
From new installations and urgent repairs to wholesale supply and building-wide AC pipework, we provide dependable service, high-quality materials, and competitive prices.
AC Installation
Professional air conditioning installation for homes, offices, shops, and commercial buildings.
AC Repair
Fast and reliable repairs for faulty, leaking, noisy, or underperforming air conditioning systems.
AC Wholesale
High-quality air conditioning units, components, and materials supplied at competitive prices.
AC Pipework
Reliable refrigerant pipework design and installation for residential, commercial, and large buildings.
Need help choosing the right AC service?
Our team can recommend the best solution for your building and budget.
Brands We Work With
Trusted air conditioning brands,installed and serviced with care.
We install, repair and maintain systems from every major manufacturer — so whatever's already on your wall, we know how to look after it.
Systems We Install & Service
Every configuration, covered.
Whatever Brand, Whatever System
Get your free quote today
From single splits to full VRF setups, our engineers know every major brand and system inside out. Fast, upfront pricing, no surprises.
Why Choose Us
The team homeowners trustfor reliable, honest HVAC work.
Four simple reasons customers keep calling One Call HVAC, year after year.
Licensed & Insured
Fully certified techs you can trust in your home.
Fast Response
Same-day service, no waiting around all week.
Upfront Pricing
You know the cost before we start, no surprises.
5-Star Service
Hundreds of happy customers, every job done right.
Our Work
Real jobs, done right,all across London.
A look at recent installs, repairs, and pipework projects completed by our team. Drag to browse, tap any photo to see it up close.
FAQs
Air conditioning and heating,answered by London engineers.
F-Gas & Gas Safe certified engineers
Cooling and heating installs across Greater London
Most single-room split system installs in London range from £1,200 to £2,500 fully fitted, depending on unit brand, room size, and pipe run length. Multi-room and multi-split systems typically start from £3,000. We survey your property first and give you a fixed, no-surprises quote before any work begins.
A standard single split system is usually installed in 4 to 6 hours by our two-person team. Larger multi-split or ducted systems across several rooms can take 1 to 2 days. We always confirm timing on-site during your survey so you know exactly what to expect.
For most domestic properties, external condenser units fall under permitted development and don't need planning permission. Flats, listed buildings, and conservation areas in boroughs like Westminster, Camden, and Kensington & Chelsea sometimes have extra restrictions. We check this for you as part of every survey.
Yes. Modern reversible heat pump split systems cool your home in summer and heat it efficiently in winter, often at a lower running cost than gas central heating for a single room or extension. If you're weighing up options, we'll walk you through heating-only, cooling-only, and reversible systems so you get the right fit for your home.
We recommend a full service once a year, ideally in spring before the summer season starts. Regular servicing, filter cleans, refrigerant checks, and coil cleaning keeps units running efficiently, protects your manufacturer warranty, and typically extends the system's lifespan by several years.
Yes. All our engineers hold F-Gas certification for refrigerant handling, and our heating engineers are Gas Safe registered where gas-related work is involved. Every installation is fully compliant with UK building regulations and comes with a workmanship guarantee.
We install, maintain, and repair air conditioning and heating systems across Greater London, including North, South, East, and West London and the surrounding M25 boroughs. Same-week booking is usually available, with priority slots for breakdowns.