Air-con that just works.
Installed properly.
Local F-Gas registered installers covering Durham, Newcastle, Sunderland and the North East.
Takes around 60 seconds. No pressure. Final price confirmed before any work starts.
A straightforward path to comfort.
Answer a few quick questions
Tell us about the room, wall type, outdoor unit location and pipe run.
See your installed price
We'll recommend suitable units and show what's included in the standard installation.
Confirm with photos or a free survey
Before installation, we check the details and confirm the final fixed price.
Installation & aftercare
We install, commission the system, complete the paperwork and explain how everything works.
One fixed price. Everything covered.
No surprise extras, no add-ons mid-job. Your quote includes the full install, materials, commissioning paperwork and warranty registration — so you're comfortable from day one.
- Indoor wall-mounted unit (or cassette)
- External condenser unit
- All copper pipework and electrical wiring
- Wireless remote and smart control
- Full commissioning & F-Gas paperwork
- Warranty registration
Complete climate comfort, expertly installed.
From single-room split systems to full commercial fit-outs — we deliver tidy installs, proper paperwork, and friendly aftercare.
Air Conditioning Installation
Wall, ceiling cassette, and multi-split systems for homes and offices.
Heating & Heat Pumps
Year-round comfort with energy-saving heat pump technology.
Servicing & F-Gas
Annual servicing, leak checks, and regulated F-Gas refrigerant work.
Domestic Projects
Single-room comfort to whole-home climate control.
Commercial Fit-outs
Offices, shops, salons and server rooms across the North East.
Manufacturer Warranties
Up to 10-year warranties on accredited installations.
Sleek units that fit your home.
Modern wall-mounted systems are compact, quiet and unobtrusive — designed to blend into any room.
Get a quote in 60 seconds
Tell us about your space and we'll show you an estimated installation cost — no email required until you're ready.
Finance options available.
We've partnered with Phoenix Finance to offer a range of flexible payment plans, making it easier than ever to get your perfect climate control system installed.
- Competitive interest rates
- Quick & easy application
- Flexible repayment terms
- Instant decision in most cases
Finance subject to status and eligibility. T&Cs apply. 18+ UK residents only.
Your home's climate, finally under your control.
Cools in summer
Sleep, work and relax through every heatwave.
Heats in winter
Heat pump tech — up to 4× more efficient than electric heating.
Cleaner air
Built-in filters trap dust, pollen and allergens.
Lower bills
Inverter technology slashes running costs vs. radiators.
Whisper-quiet
Modern units run from just 19 dB(A) — quieter than a whisper.
Year-round comfort
One smart system for every season.
Trusted across the North East.
"Onflo installed a Mitsubishi system across our home — tidy, professional and finished in two days. The temperature is perfect every room."
"Fantastic from quote to install. Honest advice on which brand suited our budget, no pushy upsells. Office is finally comfortable."
"Booked a survey on Monday, installed by Friday. Quiet, sleek, and the heating mode has cut our winter bills. Highly recommend."
Tell us about your space.
Fill in the form and we'll be in touch within one working day to arrange a free, no-obligation survey across Durham, Newcastle, Sunderland, Gateshead, Northumberland and the wider North East.
Everything you wanted to ask.
Serving the whole North East.
Based in Durham, we travel across Tyne & Wear, County Durham, Northumberland and Teesside — from city centres to coastal towns and rural villages.